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index of /ds/fa/ name last modified size description parent directory fan1084.pdf 22-dec-99 00:03 45k fan1086.pdf 27-jan-00 00:00 45k fan1581.pdf 02-feb-00 00:00 63k fan1582.pdf 11-feb-00 00:00 66k fan4040.pdf 02-feb-00 00:00 14k fan4050.pdf 27-jan-00 00:00 38k fan5061.pdf 14-sep-99 00:00 149k fan5201.pdf 28-jan-00 00:00 122k fan8024d.pdf 10-jan-00 17:01 193k FAN8026D.pdf 10-jan-00 17:01 343k fan8037.pdf 10-jan-00 17:01 396k fan8038.pdf 10-jan-00 17:01 178k fan8725.pdf 10-jan-00 17:01 264k fan8800.pdf 10-jan-00 17:01 99k
preliminary information preliminary specification describes products that are not in full production at the time of printing. specifications are based on design goals and limited characterization. they may change without notice. contact fairchild semiconductor for current information. www.fairchildsemi.com features ? fast transient response ? low dropout voltage at up to 4.5a ? load regulation: 0.5% typical ? on-chip thermal limiting ? standard to-220 and to-263 center cut packages applications ? desktop pcs, risc and embedded processors supply ? gtl, sstl logic reference bus supply ? low voltage v cc logic supply ? battery-powered circuitry ? post regulator for switching supply ? cable and adsl modems dsp core supply ? set top boxes and web boxes modules supply description the fan1084 and fan1084-1.5 are low dropout three-ter- minal regulators with 4.5a output current capability. these devices have been optimized for low voltage applications including v tt bus termination, where transient response and minimum input voltage are critical. the fan1084 is ideal for low voltage microprocessor applications requiring a regu- lated output from 1.5v to 3.6a with an input supply of 5v or less. the fan1084-1.5 offers ?xed 1.5v with 4.5a current capabilities for gtl+ bus v tt termination. on-chip thermal limiting provides protection against any combination of overload and ambient temperature that would create excessive junction temperatures. the fan1084 series regulators are available in the industry- standard to-220 and to-263 center cut power packages. block diagram 10 f 22 f 124 124 v in = 5v 2.5v at 4.5a + + v in adj v out fan1084 10 f 22 f v in = 3.3v 1.5v at 4.5a + + v in gnd v out fan1084-1.5 fan1084 4.5a adjustable/fixed low dropout linear regulator rev. 0.8.1
fan1084 product specification 2 preliminary information pin assignments absolute maximum ratings parameter min. max. unit v in 7v operating junction temperature range 0 125 c storage temperature range C65 150 c lead temperature (soldering, 10 seconds) 300 c gnd out front view 3-lead plastic to-220 q jc =3 c/w* 3-lead plastic to-263 q jc =10 c/w* *with package soldered to 0.5 square inch copper area over backside ground plane or internal power plane, q ja can vary from 30 c/w to more than 40 c/w. other mounting techniques may provide better power dissipation than 30 c/w. fan1084m-1.5 in 12 3 adj out front view in 12 3 gnd tab is out. front view in 12 3 fan1084m fan1084t fan1084t-1.5 adj front view in 12 3
product specification fan1084 3 preliminary information electrical characteristics operating conditions: 4.75 v in < 5.25v, t j = 25c unless otherwise speci?ed. notes: 1. see thermal regulation specifications for changes in output voltage due to heating effects. load and line regulation are measured at a constant junction temperature by low duty cycle pulse testing. 2. line and load regulation are guaranteed up to the maximum power dissipation. power dissipation is determined by input/ output differential and the output currrent. guaranteed maximum output power will not be available over the full input/output voltage range. 3. fan1084 only. 4. guaranteed by design. 5. fan1084-1.5 only. parameter conditions min. typ. max units reference voltage 3 adj connected to ground, i out = 10ma 1.23 1.250 1.27 v output voltage 5 i out = 10ma 1.475 1.5 1.525 v line regulation 1, 2 i out = 10ma 0.5 2 % load regulation 1, 2 10ma i out 4.5a 0.5 2.5 % dropout voltage d v ref = 2%, i out = 4.5a 1.5 v current limit (v in C v out ) = 2v 5.5 a adjust pin current 3 35 100 a mimimum load current 4 1.5v (v in C v out ) 5.75v 10 ma quiescent current 4 v in = 5v 4 ma thermal resistance, junction to case to-220 3 c/w to-263 10 c/w thermal shutdown 4 150 c typical performance characteristics figure 1. maximum power dissipation 20 15 10 5 0 25 45 65 85 105 125 power (w) case temperature to-220 to-263
fan1084 product specification 4 preliminary information applications information general the fan1084 and fan1084-1.5 are three-terminal regula- tors optimized for gtl+ v tt termination and logic applica- tions. these devices are short-circuit protected, and offer thermal shutdown to turn off the regulator when the junction temperature exceeds about 150c. the fan1084 series pro- vides low dropout voltage and fast transient response. fre- quency compensation uses capacitors with low esr while still maintaining stability. this is critical in addressing the needs of low voltage high speed microprocessor buses like gtl+. stability the fan1084 series requires an output capacitor as a part of the frequency compensation. it is recommended to use a 22f solid tantalum or a 100f aluminum electrolytic on the output to ensure stability. the frequency compensation of these devices optimizes the frequency response with low esr capacitors. in general, it is suggested to use capacitors with an esr of <1 w . it is also recommended to use bypass capacitors such as a 22f tantalum or a 100f aluminum on the adjust pin of the fan1084 for low ripple and fast transient response. when these bypassing capacitors are not used at the adjust pin, smaller values of output capacitors provide equally good results. protection diodes in normal operation, the fan1084 series does not require any protection diodes. for the fan1084, internal resistors limit internal current paths on the adjust pin. therefore, even with bypass capacitors on the adjust pin, no protection diode is needed to ensure device safety under short-circuit condi- tions. a protection diode between the input and output pins is usu- ally not needed. an internal diode between the input and the output pins on the fan1084 series can handle microsecond surge currents of 50a to 100a. even with large value output capacitors it is dif?cult to obtain those values of surge cur- rents in normal operation. only with large values of output capacitance, such as 1000 m f to 5000 m f, and with the input pin instantaneously shorted to ground can damage occur. a crowbar circuit at the input can generate those levels of cur- rent; a diode from output to input is then recommended, as shown in figure 2. usually, normal power supply cycling or system hot plugging and unplugging will not generate cur- rent large enough to do any damage. the adjust pin can be driven on a transient basis 7v with respect to the ouput, without any device degradation. as with any ic regulator, exceeding the maximum input-to-output voltage differential causes the internal transistors to break down and none of the protection circuitry is then functional. figure 2. optional protection ripple rejection in applications that require improved ripple rejection, a bypass capacitor from the adjust pin of the fan1084 to ground reduces the output ripple by the ratio of v out /1.25v. the impedance of the adjust pin capacitor at the ripple frequency should be less than the value of r1 (typically in the range of 100 w to 120 w ) in the feedback divider network in figure 2. therefore, the value of the required adjust pin capacitor is a function of the input ripple frequency. for example, if r1 equals 100 w and the ripple frequency equals 120hz, the adjust pin capacitor should be 22f. at 10khz, only 0.22f is needed. output voltage the fan1084 regulator develops a 1.25v reference voltage between the ouput pin and the adjust pin (see figure 3). placing a resistor r1 between these two terminals causes a constant current to ?ow through r1 and down through r2 to set the overall output voltage. normally, this current is the speci?ed minimum load current of 10ma. fan1084 adj c2 22 f v out + c1 10 f + + in out d1 1n4002 (optional) v in fan1084-1.5 gnd c2 22 f v out + c1 10 f + in out d1 1n4002 (optional) v in r1 r2 c adj
product specification fan1084 5 preliminary information the current out of the adjust pin adds to the current from r1. its output voltage contribution is small and only needs consid- eration when a very precise output voltage setting is required. figure 3. basic regulation circuit load regulation it is not possible to provide true remote load sensing because the fan1084 series are three-terminal devices. load regula- tion is limited by the resistance of the wire connecting the reg- ulator to the load. load regulation per the data sheet speci?cation is measured at the bottom of the package. for ?xed voltage devices, negative side sensing is a true kelvin connection with the ground pin of the device returned to the negative side of the load. this is illustrated in figure 4. figure 4. connection for best load regulation for adjustable voltage devices, negative side sensing is a true kelvin connection with the bottom of the output divider returned to the negative side of the load. the best load regula- tion is obtained when the top of the resistor divider r1 connects directly to the regulator output and not to the load. figure 5 illustrates this point. if r1 connects to the load, then the effective resistance between the regulator and the load would be: r p x (1 + r2/r1), r p = parasitic line resistance the connection shown in figure 5 does not multiply r p by the divider ration. as an example, r p is about four milliohms per foot with 16-gauge wire. this translates to 4mv per foot at 1a load current. at higher load currents, this drop represents a signi?cant percentage of the overall regulation. it is important to keep the positive lead between the regulator and the load as short as possible and to use large wire or pc board traces. figure 5. connection for best load regulation thermal conditions the fan1084 series protect themselves under overload con- ditions with internal power and thermal limiting circuitry. however, for normal continuous load conditions, do not exceed maximum junction temperature ratings. it is impor- tant to consider all sources of thermal resistance from junc- tion-to-ambient. these sources include the junction-to-case resistance, the case-to-heatsink interface resistance, and the heat sink resistance. thermal resistance speci?cations have been developed to more accurately re?ect device tempera- ture and ensure safe operating temperatures. the electrical characteristics section provides a separate thermal resistance and maximum junction temperature for both the control cir- cuitry and the power transistor. calculate the maximum junc- tion temperature for both sections to ensure that both thermal limits are met. for example, look at using an fan1084t to generate 4.5a @ 1.5v from a 3.3v source (3.2v to 3.6v). assumptions ?v in = 3.6v worst case ?v out = 1.475v worst case ?i out = 4.5a continuous ?t a = 60 c ? q case-to-ambient = 5 c/w (assuming both a heatsink and a thermally conductive material) the power dissipation in this application is: p d = (v in C v out ) * (i out ) = (3.6 C 1.475) * (4.5) = 9.6w from the speci?cation table: t j = t a + (p d ) * ( q case-to-ambient + q jc ) = 60 + (9.6) * (5 + 3) = 137 c the junction temperature is below the maximum thermal limit. fan1084 adj c2 22 f v out + c1 10 f i adj 35 a + in out v in v out = v ref (1 + r2/r1) + i adj (r2) r1 r2 v ref fan1084-1.5 gnd r l r p parasitic line resistance in out v in fan1084 adj r l r1* r2* *connect r1 to case connect r2 to load r p parasitic line resistance in out v in
fan1084 product specification 6 preliminary information junction-to-case thermal resistance is speci?ed from the ic junction to the bottom of the case directly below the die. this is the lowest resistance path for heat ?ow. proper mounting ensures the best thermal ?ow from this area of the package to the heat sink. use of a thermally conductive material at the case-to-heat sink interface is recommended. use a thermally conductive spacer if the case of the device must be electri- cally isolated and include its contribution to the total thermal resistance. the cases of the fan1084 series are directly con- nected to the output of the device. figure 6. application circuit table 1. bill of materials for application circuit for the fan1084 figure 7. application circuit (fan1084-1.5) table 2. bill of materials for application circuit for the fan1084-1.5 item quantity manufacturer part number description c1 1 xicon l10v10 10f, 10v aluminum c2, c3 2 xicon l10v100 100f, 10v aluminum r1, r2 2 generic 124 w , 1% u1 1 fairchild fan1084t 4.5a regulator item quantity manufacturer part number description c1 1 xicon l10v10 10f, 10v aluminum c2 1 xicon l10v100 100f, 10v aluminum u1 1 fairchild fan1084t-1.5 4.5a regulator fan1084 adj c3 100 f c2 100 f v out 2.5v + c1 10 f + + v in v out u1 r1 124 r2 124 v in = 3.3v fan1084-1.5 u1 gnd c2 100 f v out 1.5v + c1 10 f + v in v out v in = 3.3v
fan1084 product specification 7 preliminary information mechanical dimensions 3-lead to-263 center cut package a .160 .190 4.06 4.83 symbol inches min. max. min. max. millimeters notes b .020 .039 0.51 0.99 .051 1.30 b2 .049 1.25 c2 .045 .055 1.14 1.40 d .340 .380 8.64 9.65 e .380 .405 9.65 10.29 .100 bsc 2.54 bsc .575 .625 14.61 15.88 e l l1 .090 .110 2.29 2.79 .055 1.40 .017 .019 0.43 0.48 a l2 r 0 8 0 8 e @pkg/ @heatsink d l2 a -c- l c2 l1 r (2 plcs) -a- -b- e-pin b2 b e notes: 1. 2. 3. 4. 5. dimensions are exclusive of mold flash and metal burrs. standoff-height is measured from lead tip with ref. to datum -b-. foot length ismeasured with ref. to datum -a- with lead surface (at inner r). dimension exclusive of dambar protrusion or intrusion. formed leads to be planar with respect to one another at seating place -c-.
fan1084 product specification 8 preliminary information mechanical dimensions (continued) 3-lead to-220 package a .140 .190 3.56 4.83 symbol inches min. max. min. max. millimeters notes b .015 .040 .38 1.02 .070 1.78 b1 .045 1.14 c1 .014 .022 .36 .56 ? .139 .161 3.53 4.09 d .560 .650 14.22 16.51 .380 .420 9.65 10.67 .090 .110 2.29 2.79 e e e1 .190 .210 4.83 5.33 .045 1.14 .020 .055 .51 1.40 a e3 f h1 .230 .270 5.94 6.87 .060 .115 2.04 2.92 .500 .580 12.70 14.73 j1 l 6.35 bsc .250 bsc l1 1.00 1.35 2.54 3.43 3 7 3 7 q b1 b e3 l1 l h1 q e e e1 e-pin ? c1 j1 d f a (5x) a notes: 1. dimension c1 apply for lead finish.
fan1084 product specification preliminary information 8/6/99 0.0m 003 stock#ds30001584 1998 fairchild semiconductor corporation life support policy fairchilds products are not authorized for use as critical components in life support devices or systems without the express written approval of the president of fairchild semiconductor corporation. as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2. a critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com ordering information product number package fan1084mc to-263 fan1084t to-220 fan1084mc-1.5 to-263 fan1084t-1.5 to-220
www.fairchildsemi.com target specification describes products that are in the definition stage. specifications may rev. 0.0.2 change in any manner without notice. contact fairchild semiconductor for current information. target speci?cation features ? low dropout voltage ? load regulation: 0.05% typical ? trimmed current limit ? on-chip thermal limiting ? standard sot-223 and to-263 packages ? three-terminal adjustable or ?xed 2.5v, 2.85v, 3.3v, 5v applications ? active scsi terminators ? high ef?ciency linear regulators ? post regulators for switching supplies ? battery chargers ? 5v to 3.3v linear regulators ? motherboard clock supplies description the fan1086 and fan1086-2.5, -2.85, -3.3 and -5 are low dropout three-terminal regulators with 1.5a output current capability. these devices have been optimized for low voltage where transient response and minimum input voltage are critical. the 2.85v version is designed speci?cally to be used in active terminators for scsi bus. current limit is trimmed to ensure speci?ed output current and controlled short-circuit current. on-chip thermal limiting provides protection against any combination of overload and ambient temperatures that would create excessive junction temperatures. unlike pnp type regulators where up to 10% of the output current is wasted as quiescent current, the quiescent current of the fan1086 ?ows into the load, increasing ef?ciency. the fan1086 series regulators are available in the industry- standard sot-223 and to-263 power packages. typical applications v in = 3.3v v in v out adj 1.5v at 1.5a fan1086 10 f22 f 124 24.9 v in = 5v v in v out gnd 2.85v at 1.5a fan1086-2.85 10 f ++ + + 22 f fan1086 1.5a adjustable/fixed low dropout linear regulator
target specification fan1086 2 rev. 0.0.2 11/23/99 target speci?cation pin assignments *with package soldered to 0.5 square inch copper area over backside ground plane or internal power plane., q ja can vary from 30c/w to more than 50c/w. other mounting techniques may provide better thermal resistance than 30c/w. absolute maximum ratings parameter min. max. unit v in 7.5 v operating junction temperature range 0 125 c storage temperature range -65 150 c lead temperature (soldering, 10 sec.) 300 c front view 4-lead plastic sot-223 q jc = 15 c/w* 3-lead plastic to-263 q jc = 10 c/w* tab is v out tab is v out 1 adj/ gnd out in 23 3 2 1 in out adj/gnd
fan1086 target specification rev. 0.0.2 11/23/99 3 target speci?cation electrical characteristics operating conditions: v in 7v, t j = 25c unless otherwise speci?ed. the denotes speci?cations which apply over the speci?ed operating temperature range. notes: 1. see thermal regulation specifications for changes in output voltage due to heating effects. load and line regulation are measured at a constant junction temperature by low duty cycle pulse testing. 2. line and load regulation are guaranteed up to the maximum power dissipation (18w). power dissipation is determined by input/output differential and the output current. guaranteed maximum output power will not be available over the full input/ output voltage range. 3. fan1086 only. parameter conditions min. typ. max. units reference voltage 3 1.5v (v in - v out ) 5.75v, 10ma i out 1a 1.225 (-2%) 1.250 1.275 (+2%) v output voltage 10ma i out 1a fan1086-2.5, 4v v in 7v fan1086-2.85, 4.35v v in 7v fan1086-3.3, 4.8v v in 7v fan1086-5, 6.5v v in 7v 2.450 2.793 3.234 4.900 2.5 2.85 3.3 5.0 2.550 2.907 3.366 5.100 v v v v line regulation 1,2 (v out + 1.5v) v in 7v, i out = 10ma 0.005 0.2 % load regulation 1,2 (v in C v out ) = 2v, 10ma i out 1a 0.05 0.5 % dropout voltage d v ref = 1%, i out = 1.5a 1.300 1.500 v current limit (v in C v out ) = 2v 1.6 2.0 a adjust pin current 3 35 120 m a adjust pin current change 3 1.5v (v in C v out ) 5.75, 10ma i out 1a 0.2 5 m a minimum load current 1.5v (v in C v out ) 5.75 10 ma quiescent current v in = v out + 1.25v 413ma ripple rejection f = 120hz, c out = 22 m f tantalum, (v in C v out ) = 3v, i out = 1.5a 60 72 db thermal regulation t a = 25 c, 30ms pulse 0.004 0.02 %/w temperature stability 0.5 % long-term stability t a = 125 c, 1000hrs. 0.03 1.0 % rms output noise (% of v out ) t a = 25 c, 10hz f 10khz 0.003 % thermal resistance, juncation to case sot-223 15 c/w to-263 10 c/w thermal shutdown junction temperature 155 c thermal shutdown hysteresis 10 c
target specification fan1086 4 rev. 0.0.2 11/23/99 target speci?cation typical performance characteristics 1.5 0.10 0.05 0 -0.05 -0.10 -0.15 -0.20 1.4 1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5 1.250 1.245 1.240 1.235 1.230 1.225 1.220 1.215 1.210 1.205 1.200 0 0 0.9 1.2 0.6 0.3 output current (a) junction temperature ( c) junction temperature ( c) junction temperature ( c) dropout voltage (v) reference voltage (v) 3.70 3.65 3.60 3.55 3.50 3.45 3.40 3.35 3.30 3.25 3.20 reference voltage (v) 100 90 80 70 60 50 40 30 20 10 0 adjust pin current ( a) 5 4 3 2 1 0 minimum load current (ma) dropout voltage deviation (%) 1.5 -75 -50 -25 0 25 50 75 100 125 150 175 -75 -50 -25 0 25 50 75 100 125 150 175 -75 -50 -25 0 25 50 75 100 125 150 175 junction temperature ( c) -75 -50 -25 0 25 50 75 100 125 150 175 junction temperature ( c) -75 -50 -25 0 25 50 75 100 125 150 175 d i = 1a v out = 3.6v 1 v out set with 1% resistors v out = 3.3v note: 1. fan1086 only note: 1. fan1086 only figure 1. dropout voltage vs. output current figure 2. load regulation vs. temperature figure 3. reference voltage vs. temperature figure 4. output voltage vs. temperature figure 5. minimum load current vs. temperature figure 6. adjust pin current vs. temperature
fan1086 target specification rev. 0.0.2 11/23/99 5 target speci?cation typical performance characteristics (continued) figure 7. short-circuit current vs. temperature figure 8. ripple rejection vs. frequency figure 9. maximum power dissipation 2.0 1.75 1.5 1.25 1.0 short-circuit current (a) junction temperature ( c) -75 -50 -25 0 25 50 75 100 125 150 175 10 7.5 5 2.5 0 power (w) case temperature ( c) 25 45 65 85 105 125 to-263 sot-223 90 80 70 60 50 40 30 20 10 0 ripple rejection (db) frequency (hz) 10 100 1k 10k 100k (v in - v out ) = 3v 0.5 < v ripple < 2v i out = 1a
target specification fan1086 6 rev. 0.0.2 11/23/99 target speci?cation mechanical dimensions 3-lead to-263 package a .160 .190 4.06 4.83 symbol inches min. max. min. max. millimeters notes b .020 .039 0.51 0.99 .051 1.30 b2 .049 1.25 c2 .045 .055 1.14 1.40 d .340 .380 8.64 9.65 e .380 .405 9.65 10.29 .100 bsc 2.54 bsc .575 .625 14.61 10.88 e l l1 .090 .100 2.29 2.79 .055 1.40 .017 .019 0.43 0.48 a l2 r 0 8 0 8 e @pkg/ @heatsink d l2 a -c- l c2 l1 r (2 plcs) -a- -b- e-pin b2 b e notes: 1. 2. 3. 4. 5. dimensions are exclusive of mold flash and metal burrs. stand off-height is measured from lead tip with ref. to datum -b-. foot length is measured with ref. to datum -a- with lead surface (at inner r). dimension exclusive of dambar protrusion or intrusion. formed leads to be planar with respect to one another at seating place -c-.
fan1086 target specification rev. 0.0.2 11/23/99 7 target speci?cation mechanical dimensions 4-lead sot-223 package a .071 symbol inches min. max. min. max. millimeters notes a1 .181 .033 b .025 c .090 e .130 .148 e h .264 .287 .115 .124 .033 .041 ?0 f f i j d .248 .264 1.80 4.80 .840 .640 2.29 3.30 3.71 6.71 7.29 .012 .310 2.95 3.15 .840 1.04 ?0 10 16 k 10 16 .0008 .0040 l .0203 .1018 10 16 m 10 16 .010 .014 n .250 .360 6.30 6.71 a d e e c h a1 b i j k l m n
target specification fan1086 target speci?cation life support policy fairchilds products are not authorized for use as critical components in life support devices or systems without the express written approval of the president of fairchild semiconductor corporation. as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2. a critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com 11/23/99 0.0m 004 stock#ds30001117 1998 fairchild semiconductor corporation ordering information product number package fan1086m to-263 fan1086s sot-223 fan1086m-2.5 to-263 fan1086s-2.5 sot-223 fan1086m-2.85 to-263 fan1086s-2.85 sot-223 fan1086m-3.3 to-263 fan1086s-3.3 sot-223 fan1086m-5 to-263 fan1086s-5 sot-223
trademarks acex? coolfet? crossvolt? e 2 cmos tm fact? fact quiet series? fast ? fastr? gto? hisec? the following are registered and unregistered trademarks fairchild semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks. life support policy fairchild?s products are not authorized for use as critical components in life support devices or systems without the express written approval of fairchild semiconductor corporation. as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, or (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user. 2. a critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. product status definitions definition of terms datasheet identification product status definition advance information preliminary no identification needed obsolete this datasheet contains the design specifications for product development. specifications may change in any manner without notice. this datasheet contains preliminary data, and supplementary data will be published at a later date. fairchild semiconductor reserves the right to make changes at any time without notice in order to improve design. this datasheet contains final specifications. fairchild semiconductor reserves the right to make changes at any time without notice in order to improve design. this datasheet contains specifications on a product that has been discontinued by fairchild semiconductor. the datasheet is printed for reference information only. formative or in design first production full production not in production disclaimer fairchild semiconductor reserves the right to make changes without further notice to any products herein to improve reliability, function or design. fairchild does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights, nor the rights of others. syncfet? tinylogic? uhc? vcx? isoplanar? microwire? pop? powertrench qfet? qs? quiet series? supersot?-3 supersot?-6 supersot?-8 ? rev. d
preliminary speci?cation preliminary specification describes products that are not in full production at time of printing. specifications are based on design goals and limited characterization. in the process of final production release, specifications may change. contact fairchild semiconducto r for current information. www.fairchildsemi.com rev. 0.8.0 pentium is a registered trademark of intel corporation. powerpc is a trademark of ibm corporation. features ? ultra low dropout voltage, 0.4v typical at 5a ? remote sense operation ? fast transient response ? load regulation: 0.05% typical ? 0.5% initial accuracy ? on-chip thermal limiting ? 5 pin standard to-220 and to-263 packages applications ? pentium ? processors ? powerpc ? , amd k5 and k6 processors ? pentium support of gtl+ bus supply ? low voltage logic supply ? embedded processor supplies ? split plane regulator ? new 2.5v and 1.8v logic families description the fan1581, fan1581-1.5, and fan1581-2.5 are ultra-low dropout regulators with 5a output current capability. these devices have been optimized for low voltage applications including v tt bus termination, where transient response and minimum input voltage are critical. the fan1581 is ideal for low voltage microprocessor applications requiring a reg- ulated output from 1.3v to 5.7v with a power input supply of 1.75v to 6.5v. the fan1581-1.5 offers ?xed 1.5v with 5a current capabilities for gtl+ bus v tt termination. the fan1581-2.5 offers ?xed 2.5v with 5a current capability for logic ic operation and processors while minimizing the overall power dissipation. current limit ensures controlled short-circuit current. on-chip thermal limiting provides protection against any combination of overload and ambient temperature that would create exces- sive junction temperatures. the fan1581 series regulators are available in the industry- standard 5-pin to-220 and to-263 power packages. typical applications 22 f v cntl = 5v 2.1v at 5a 10 f v in = 3.3v + + v in v sense v cntl adj v out fan1581 22 f v cntl = 3.3v 2.5v at 5a 10 f v in = 3.0v + 1 f + + v in v sense v cntl gnd v out fan1581?.5 86.6 124 22 f v cntl = 12v 5v at 5a 10 f v in = 5.75v + + v in v sense v cntl adj v out fan1581 374 124 fan1581 5a adjustable/fixed ultra low dropout linear regulator
fan1581 product specification 2 preliminary speci?cation pin assignments pin de?nitions internal block diagram pin number pin name pin function descrition 1 vsense remote voltage sense . connect this pin to the load to permit true remote sensing and avoid trace drops. 2 adj/gnd adjust or ground. on the fan1581, this pin forms the feedback to determine the output voltage. on the fan1581-1.5 and -2.5, connect this pin to ground. 3 vout output voltage. this pin and the tab are output. 4 vcntl control voltage. this pin draws small-signal power to control the fan1581 circuitry. connect to a voltage higher than vin, as shown in the applications circuits. 5 vin input voltage. front view 12 3 4 5 gnd cntl out s front view in 123 4 5 adj cntl out s front view in adj cntl out sin 123 4 5 fan1581m-1.5, -2.5 fan1581m fan1581t front view 12 3 4 5 gnd cntl out sin fan1581t-1.5, -2.5 5-lead plastic to-263 q jc =3 c/w* 5-lead plastic to-220 q jc =3 c/w* *with package soldered to 0.5 square inch copper area over backside ground plane or internal power plane. q ja can vary fom 20 c/w to >40 c/w with other mounting techniques. current limit thermal shutdown vref vin, power output sense adj v cntl , control 2 1 3 5 4 voltage loop amplifier
product specification fan1581 3 preliminary speci?cation absolute maximum ratings electrical characteristics t j =25c, v out = v s , v adj = 0v unless otherwise speci?ed. the ? denotes speci?cations which apply over the speci?ed operating temperature range. notes: 1. see thermal regulation specifications for changes in output voltage due to heating effects. load and line regulation are measured at a constant junction temperature by low duty cycle pulse testing. 2. line and load regulation are guaranteed up to the maximum power dissipation (18w). power dissipation is determined by input/output differential and the output current. guaranteed maximum output power will not be available over the full input/ output voltage range. 3. fan1581 only. 4. fan1581-1.5 only. 5. fan1581-2.5 only. parameter min. max. unit v in 7v v cntl 13.2 v operating junction temperature range 0 125 c lead temperature (soldering, 10 sec.) 300 c storage temperature range -65 150 c parameter conditions min. typ. max. units reference voltage 3 v in = 2.0v, v cntl = 2.75v, i out = 10ma 1.243 1.250 1.257 v reference voltage 3 2.05v v in 5.5v, 2.7v v cntl 12v, 10ma i out 5a ? 1.237 1.250 1.263 v adjustable output voltage 3v v in 7v (function of vout), 10ma i out 5a ? vref 1.5 5.7 v output voltage 4 3v v in 7v, 10ma i out 5a ? 1.47 1.5 1.53 v output voltage 5 5.1v v in 7v, 10ma i out 5a ? 2.474 2.5 2.526 v line regulation 1,2 1.75v v in 5.5v, 2.5v v cntl 12v, i out = 10ma ?13mv load regulation 1,2 v in = 2.1v, v cntl = 2.75v, 10ma i out 5a ?15mv dropout voltage minimum v cntl v in = 2.05v, d v ref = 1%, i out = 5a ? 1.05 1.18 v dropout voltage minimum v in v cntl = 2.75v, d v ref = 1%, i out = 5a 0.4 0.5 v dropout voltage minimum v in v cntl = 2.75v, d v ref = 1%, i out = 5a ? 0.5 0.6 v current limit v in = 2.05v, v cntl = 2.75v ? 5.2 a control pin current v in = 2.05v, v cntl = 2.75v, i out = 10ma ? 30 120 a adjust pin current 3 v in = 2.05v, v cntl = 2.75v ? 50 120 ma minimum load current v in = 3.3v, v cntl = 5v ? 5.0 10 ma ripple rejection v in = 3.75v, v cntl = 3.75v, f = 120hz, c out = 22f tantalum, i out = 2.5a 60 80 db thermal resistance, junction to case 3 c/w thermal regulation t a = 25c, 30ms pulse 0.002 0.02 %/w thermal shutdown 150 c
fan1581 product specification 4 preliminary speci?cation typical perfomance characteristics t=0 c t=125 c t=25 c 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 01 2 4 35 dropout voltage (v) reference voltage minimum load current (ma) output current (a) dropout voltage vs. output current load regulation vs. temperature reference voltage vs. temperature output voltage vs. temperature mimimum load current vs. temperature adjust pin current vs. temperature 0.10 0.05 0 -0.05 -0.10 -0.15 -0.20 -75 -50 -25 25 50 75 100 125 150 175 0 output voltage deviation (%) junction temperature ( c) junction temperature ( c) di =5a 1.275 1.270 1.265 1.260 1.255 1.250 1.245 1.240 1.235 1.230 1.225 output voltage (v) adjust pin current ( a) 3.70 3.65 3.60 3.55 3.50 3.45 3.40 3.35 3.30 3.25 3.20 100 90 80 70 60 50 40 30 20 10 0 -75 -50 -25 0 25 50 75 100 125 150 175 junction temperature ( c) -75 -50 -25 0 25 50 75 100 125 150 175 junction temperature ( c) -75 -50 -25 0 25 50 75 100 125 150 175 junction temperature ( c) -75 -50 -25 0 25 50 75 100 125 150 175 v out set with 1% resistors v out = 3.3v 1 note: 1. fan1581 only 10 8 6 4 2 0 note: 1. fan1581 only
product specification fan1581 5 preliminary speci?cation typical perfomance characteristics (continued) 11 9 7 short-circuit current (a) power (w) ripple rejections (db) 5 3 -75 -50 -25 25 50 75 100 125 150 175 20 25 45 65 85 105 125 15 10 5 0 0 junction temperature ( c) case temperature frequency (hz) (v in ? out ) 3v 0.5v v ripple 2v i out = 5a 90 90 70 60 50 40 30 20 10 0 10 100 1k 10k 100k short-circuit current vs.temeperature ripple rejection vs. frequency maximum power dissipation general the fan1581, fan1581-1.5, and fan1581-2.5 are three- terminal regulators optimized for gtl+ v tt termination and logic applications. these devices are short-circuit protected, and offer thermal shutdown to turn off the regulator when the junction temperature exceeds about 150c. the fan1581 series provides low dropout voltage and fast transient response. frequency compensation uses capacitors with low esr while still maintaining stability. this is critical in addressing the needs of low voltage high speed microproces- sor buses like gtl+. stability the fan1581 series requires an output capacitor as a part of the frequency compensation. it is recommended to use a 22f solid tantalum or a 100f aluminum electrolytic on the output to ensure stability. the frequency compensation of these devices optimizes the frequency response with low esr capaci- tors. in general, it is suggested to use capacitors with an esr of <1 w . it is also recommended to use bypass capacitors such as a 22f tantalum or a 100f aluminum on the adjust pin of the fan1581 for low ripple and fast transient response. when these bypassing capacitors are not used at the adjust pin, smaller values of output capacitors provide equally good results. protection diodes in normal operation, the fan1581 series does not require any protection diodes. for the fan1581, internal resistors limit internal current paths on the adjust pin. therefore, even with bypass capacitors on the adjust pin, no protection diode is needed to ensure device safety under short-circuit conditions.
fan1581 product specification 6 preliminary speci?cation a protection diode between the input and output pins is usu- ally not needed. an internal diode between the input and the output pins on the fan1581 series can handle microsecond surge currents of 50a to 100a. even with large value output capacitors it is dif?cult to obtain those values of surge cur- rents in normal operation. only with large values of output capacitance, such as 1000f to 5000f, and with the input pin instantaneously shorted to ground can damage occur. a crowbar circuit at the input can generate those levels of current; a diode from output to input is then recommended, as shown in figure 1. usually, normal power supply cycling or system hot plugging and unplugging will not generate current large enough to do any damage. the adjust pin can be driven on a transient basis 7v with respect to the output, without any device degradation. as with any ic regulator, exceeding the maximum input-to-output voltage differential causes the internal transistors to break down and none of the protection circuitry is then functional. figure 1. optional protection diode ripple rejection in applications that require improved ripple rejection, a bypass capacitor from the adjust pin of the fan1581 to ground reduces the output ripple by the ratio of v out /1.25v. the impedance of the adjust pin capacitor at the ripple frequency should be less than the value of r1 (typically in the range of 100 w to 120 w ) in the feedback divider network in figure 1. therefore, the value of the required adjust pin capacitor is a function of the input ripple frequency. for example, if r1 equals 100 w and the ripple frequency equals 120hz, the adjust pin capacitor should be 22f. at 10khz, only 0.22f is needed. output voltage the fan1581 regulator develops a 1.25v reference voltage between the output pin and the adjust pin (see figure 2). placing a resistor r1 between these two terminals causes a constant current to ?ow through r1 and down through r2 to set the overall output voltage. normally, this current is the speci?ed minimum load current of 10ma. the current out of the adjust pin adds to the current from r1 and is typically 35a. its output voltage contribution is small and only needs consideration when a very precise output voltage setting is required. figure 2. basic regulator circuit load regulation the fan1581 family provides true remote sensing, eliminat- ing output voltage errors due to trace resistance. to utilize remote sensing, connect the vsense pin directly to the load, rather than at the vout pin. if the load is more than 1" away from the fan1581, it may be necessary to increase the load capacitance to ensure stability. thermal considerations the fan1581 series protect themselves under overload con- ditions with internal power and thermal limiting circuitry. however, for normal continuous load conditions, do not exceed maximum junction temperature ratings. it is important to consider all sources of thermal resistance from junction-to- ambient. these sources include the junction-to-case resistance, the case-to-heat sink interface resistance, and the heat sink resistance. thermal resistance speci?cations have been developed to more accurately re?ect device temperature and ensure safe operating temperatures. the electrical character- istics section provides a separate thermal resistance and maximum junction temperature for both the control circuitry and the power transistor. calculate the maximum junction temperature for both sections to ensure that both thermal limits are met. for example, look at using an fan1581t-1.5 to generate 5a @ 1.5v 2% from a 3.3v source (3.2v to 3.6v). fan1581 adj c2 22 f v out + c1 10 f + c adj + vcntl vsense vin vout r1 r2 d1 1n4002 (optional) v in v out fan1581?.5, 2.5 gnd c2 22 f v out + c1 10 f + vcntl vsense vin vout d1 1n4002 (optional) v in v cntl c2 22 f v in v out v ref c1 10 f v cntl + + vcntl vsense vin adj vout fan1581 r1 r2 i adj 50 a v out = v ref (1+r2/r1) + i adj (r2)
product specification fan1581 7 preliminary speci?cation assumptions: ?v in = 3.6v worst case ?v out = 1.47v worst case ?i out = 5a continuous ?t a = 40c ? q case-to-ambient = 5c/w (assuming both a heatsink and a thermally conductive material) the power dissipation in this application is: p d = (v in - v out ) * (i out ) = (3.6-1.47) * (5) = 10.65w from the speci?cation table, t j = t a + (p d ) * ( q case-to-ambient + q jc ) = 40 + (10.65) * (5 + 3) = 125c the junction temperature is within the maximum rating. junction-to-case thermal resistance is speci?ed from the ic junction to the bottom of the case directly below the die. this is the lowest resistance path for heat ?ow. proper mounting ensures the best thermal ?ow from this area of the package to the heat sink. use of a thermally conductive material at the case-to-heat sink interface is recommended. use a thermally conductive spacer if the case of the device must be electri- cally isolated and include its contribution to the total thermal resistance. figure 3. application circuit (fan1581) table 1. bill of materials for application circuit for the fan1581 item quantity manufacturer part number description c1, c3 2 xicon l10v10 10f, 10v aluminum c2 1 xicon l10v100 100f, 10v aluminum c4 1 any 1f ceramic r1 1 generic 86.6 w , 1% r2 1 generic 124 w , 1% u1 1 fairchild fan1581t 5a regulator 100 f c2 10 f c3 v cntl = 5v 2.1v at 5a v in = 3.3v + 10 fc1 1 f c4 + v in v sense v cntl adj v out fan1581 86.6 124 r2 r1 u1
fan1581 product specification 8 preliminary speci?cation figure 4. application circuit (fan1581-1.5) table 2. bill of materials for application circuit for the rc1581-1.5 figure 5. application circuit (fan1581-2.5) table 3. bill of materials for application circuit for the rc1581-2.5 item quantity manufacturer part number description c1 1 xicon l10v10 10f, 10v aluminum c2 1 any 1f ceramic c3 1 xicon l10v100 100f, 10v aluminum u1 1 fairchild fan1581t-1.5 5a regulator item quantity manufacturer part number description c1 1 xicon l10v10 10f, 10v aluminum c2 1 any 1f ceramic c3 1 xicon l10v100 100f, 10v aluminum u1 1 fairchild fan1581t-2.5 5a regulator 100 f c3 v cntl = 3.3v 1.5v at 5a 10 f c1 v in = 2.5v + 1 f c2 + v in v sense v cntl adj u1 v out fan1581?.5 100 f c3 v cntl = 3.3v 2.5v at 5a 10 f c1 v in = 2.5v + 1 f c2 + + v in v sense v cntl adj u1 v out fan1581?.5
product specification fan1581 9 preliminary speci?cation mechanical dimensions 5-lead to-263 package g d e-pin a c b f -c- h e j r (2plcs) -a- -b- symbol inches millimeters min. max. min. max. a .380 .405 9.65 10.29 b .575 .625 14.60 15.88 c .325 .380 8.25 9.66 d C .055 C 1.40 e .020 .039 .50 .99 f .060 .072 1.52 1.83 g 0.45 .055 1.14 1.40 h .160 .190 4.06 4.83 j .090 0.110 2.28 2.80 k .018 .029 .457 .736 r .017 .019 0.43 0.48 notes: 1. dimensions are exclusive of mold flash and metal burrs. 2. standoff-height is measured from lead tip with ref. to datum Cb-. 3. foot length is measured with ref. to datum Ca- with lead surfac e (at inner r). 4. dimension exclusive of dambar protrusion or intrusion. 5. formed leads to be planar with respect to one another at seatin g place Cc-.
fan1581 product specification 10 preliminary speci?cation mechanical demensions (continued) 5-lead to-220 package a .140 .190 3.56 4.83 symbol inches min. max. min. max. millimeters notes b .025 .040 .63 1.02 c1 .140 .220 .356 .559 ? .139 .161 3.53 4.09 d .560 .650 14.22 16.51 .380 .420 9.65 10.67 .062 .072 1.57 1.83 e e e1 .263 .273 6.68 6.94 .045 .055 1.14 1.40 a f h1 .230 .270 5.84 6.87 .080 .115 2.04 2.92 .500 .580 12.70 14.73 j1 l .100 .135 .254 .343 3 7 3 7 q b l h1 q e e e1 e-pin ? c1 j1 d f a (5x) a notes: 1. dimension c1 apply for lead finish.
fan1581 product specification preliminary speci?cation 1/20/00 0.0m 001 stock#ds30001584 1998 fairchild semiconductor corporation life support policy fairchilds products are not authorized for use as critical components in life support devices or systems without the express written approval of the president of fairchild semiconductor corporation. as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2. a critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com ordering information product number package fan1581m to-263 fan1581t to-220 fan1581m-1.5 to-263 fan1581t-1.5 to-220 fan1581m-2.5 to-263 fan1581t-2.5 to-220
trademarks acex? coolfet? crossvolt? e 2 cmos tm fact? fact quiet series? fast ? fastr? gto? hisec? the following are registered and unregistered trademarks fairchild semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks. life support policy fairchild?s products are not authorized for use as critical components in life support devices or systems without the express written approval of fairchild semiconductor corporation. as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, or (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user. 2. a critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. product status definitions definition of terms datasheet identification product status definition advance information preliminary no identification needed obsolete this datasheet contains the design specifications for product development. specifications may change in any manner without notice. this datasheet contains preliminary data, and supplementary data will be published at a later date. fairchild semiconductor reserves the right to make changes at any time without notice in order to improve design. this datasheet contains final specifications. fairchild semiconductor reserves the right to make changes at any time without notice in order to improve design. this datasheet contains specifications on a product that has been discontinued by fairchild semiconductor. the datasheet is printed for reference information only. formative or in design first production full production not in production disclaimer fairchild semiconductor reserves the right to make changes without further notice to any products herein to improve reliability, function or design. fairchild does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights, nor the rights of others. syncfet? tinylogic? uhc? vcx? isoplanar? microwire? pop? powertrench qfet? qs? quiet series? supersot?-3 supersot?-6 supersot?-8 ? rev. d
preliminary speci?cation preliminary specification describes products that are not in full production at time of printing. specifications are based on design goals and limited characterization. in the process of final production release, specifications may change. contact fairchild semiconducto r for current information. www.fairchildsemi.com rev. 0.8.0 pentium is a registered trademark of intel corporation. powerpc is a trademark of ibm corporation. features ? ultra low dropout voltage, 0.4v typical at 3a ? remote sense operation ? fast transient response ? load regulation: 0.05% typical ? 0.5% initial accuracy ? on-chip thermal limiting ? 5 pin standard to-220 and to-263 packages applications ? pentium ? processors ? powerpc ? , amd k5 and k6 processors ? pentium support of gtl+ bus supply ? low voltage logic supply ? embedded processor supplies ? split plane regulator ? new 2.5v and 1.8v logic families description the fan1582, fan1582-1.5, and fan1582-2.5 are ultra-low dropout regulators with 3a output current capability. these devices have been optimized for low voltage applications including v tt bus termination, where transient response and minimum input voltage are critical. the fan1582 is ideal for low voltage microprocessor applications requiring a reg- ulated output from 1.3v to 5.7v with a power input supply of 1.75v to 6.5v. the fan1582-1.5 offers ?xed 1.5v with 3a current capabilities for gtl+ bus v tt termination. the fan1582-2.5 offers ?xed 2.5v with 3a current capability for logic ic operation and processors while minimizing the overall power dissipation. current limit ensures controlled short-circuit current. on-chip thermal limiting provides protection against any combination of overload and ambient temperature that would create exces- sive junction temperatures. the fan1582 series regulators are available in the industry- standard 5-pin to-220 and to-263 power packages. typical applications 22 f v cntl = 5v 2.1v at 3a 10 f v in = 3.3v + + v in v sense v cntl adj v out fan1582 22 f v cntl = 3.3v 2.5v at 3a 10 f v in = 3.0v + 1 f + + v in v sense v cntl gnd v out fan1582?.5 86.6 124 22 f v cntl = 12v 5v at 3a 10 f v in = 5.75v + + v in v sense v cntl adj v out fan1582 374 124 fan1582 3a adjustable/fixed ultra low dropout linear regulator
fan1582 product specification 2 preliminary speci?cation pin assignments pin de?nitions internal block diagram pin number pin name pin function descrition 1 vsense remote voltage sense . connect this pin to the load to permit true remote sensing and avoid trace drops. 2 adj/gnd adjust or ground. on the fan1582, this pin forms the feedback to determine the output voltage. on the fan1582-1.5 and -2.5, connect this pin to ground. 3 vout output voltage. this pin and the tab are output. 4 vcntl control voltage. this pin draws small-signal power to control the fan1582 circuitry. connect to a voltage higher than vin, as shown in the applications circuits. 5 vin input voltage. front view 12 3 4 5 gnd cntl out s front view in 123 4 5 adj cntl out s front view in adj cntl out sin 123 4 5 fan1582m-1.5, -2.5 fan1582m fan1582t front view 12 3 4 5 gnd cntl out sin fan1582t-1.5, -2.5 5-lead plastic tp-263 q jc =3 c/w* 5-lead plastic tp-220 q jc =3 c/w* *with package soldered to 0.5 square inch copper area over backside ground plane or internal power plane. q ja can vary fom 20 c/w to >40 c/w with other mounting techniques. current limit thermal shutdown vref vin, power output sense adj v cntl , control 2 1 3 5 4 voltage loop amplifier
product specification fan1582 3 preliminary speci?cation absolute maximum ratings electrical characteristics t j =25c, v out = v s , v adj = 0v unless otherwise speci?ed. the ? denotes speci?cations which apply over the speci?ed operating temperature range. notes: 1. see thermal regulation specifications for changes in output voltage due to heating effects. load and line regulation are measured at a constant junction temperature by low duty cycle pulse testing. 2. line and load regulation are guaranteed up to the maximum power dissipation (18w). power dissipation is determined by input/output differential and the output current. guaranteed maximum output power will not be available over the full input/ output voltage range. 3. fan1582 only. 4. fan1582-1.5 only. 5. fan1582-2.5 only. parameter min. max. unit v in 7v v cntl 13.2 v operating junction temperature range 0 125 c lead temperature (soldering, 10 sec.) 300 c storage temperature range -65 150 c parameter conditions min. typ. max. units reference voltage 3 v in = 2.0v, v cntl = 2.75v, i out = 10ma 1.243 1.250 1.257 v reference voltage 3 2.05v v in 5.5v, 2.7v v cntl 12v, 10ma i out 3a ? 1.237 1.250 1.263 v adjustable output voltage 3v v in 7v (function of vout), 10ma i out 3a ? vref 1.5 5.7 v output voltage 4 3v v in 7v, 10ma i out 3a ? 1.47 1.5 1.53 v output voltage 5 5.1v v in 7v, 10ma i out 3a ? 2.474 2.5 2.526 v line regulation 1,2 1.75v v in 5.5v, 2.5v v cntl 12v, i out = 10ma ?13mv load regulation 1,2 v in = 2.1v, v cntl = 2.75v, 10ma i out 3a ?15mv dropout voltage minimum v cntl v in = 2.05v, d v ref = 1%, i out = 3a ? 1.05 1.18 v dropout voltage minimum v in v cntl = 2.75v, d v ref = 1%, i out = 3a 0.4 0.5 v dropout voltage minimum v in v cntl = 2.75v, d v ref = 1%, i out = 3a ? 0.5 0.6 v current limit v in = 2.05v, v cntl = 2.75v ? 3.1 a control pin current v in = 2.05v, v cntl = 2.75v, i out = 10ma ? 30 120 a adjust pin current 3 v in = 2.05v, v cntl = 2.75v ? 50 120 ma minimum load current v in = 3.3v, v cntl = 5v ? 5.0 10 ma ripple rejection v in = 3.75v, v cntl = 3.75v, f = 120hz, c out = 22f tantalum, i out = 1.5a 60 80 db thermal resistance, junction to case 3 c/w thermal regulation t a = 25c, 30ms pulse 0.002 0.02 %/w thermal shutdown 150 c
fan1582 product specification 4 preliminary speci?cation typical perfomance characteristics t=0 c t=125 c t=25 c 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 0 0.5 1 2 3 1.5 2.5 dropout voltage (v) reference voltage minimum load current (ma) output current (a) dropout voltage vs. output current load regulation vs. temperature reference voltage vs. temperature output voltage vs. temperature mimimum load current vs. temperature adjust pin current vs. temperature 0.10 0.05 0 -0.05 -0.10 -0.15 -0.20 -75 -50 -25 25 50 75 100 125 150 175 0 output voltage deviation (%) junction temperature ( c) junction temperature ( c) di =3a 1.275 1.270 1.265 1.260 1.255 1.250 1.245 1.240 1.235 1.230 1.225 output voltage (v) adjust pin current ( a) 3.70 3.65 3.60 3.55 3.50 3.45 3.40 3.35 3.30 3.25 3.20 100 90 80 70 60 50 40 30 20 10 0 -75 -50 -25 0 25 50 75 100 125 150 175 junction temperature ( c) -75 -50 -25 0 25 50 75 100 125 150 175 junction temperature ( c) -75 -50 -25 0 25 50 75 100 125 150 175 junction temperature ( c) -75 -50 -25 0 25 50 75 100 125 150 175 v out set with 1% resistors v out = 3.3v 1 note: 1. fan1582 only 10 8 6 4 2 0 note: 1. fan1582 only
product specification fan1582 5 preliminary speci?cation typical perfomance characteristics (continued) 6 5 4 short-circuit current (a) power (w) ripple rejections (db) 3 2 -75 -50 -25 25 50 75 100 125 150 175 20 25 45 65 85 105 125 15 10 5 0 0 junction temperature ( c) case temperature frequency (hz) (v in ? out ) 3v 0.5v v ripple 2v i out = 3a 90 90 70 60 50 40 30 20 10 0 10 100 1k 10k 100k short-circuit current vs.temeperature ripple rejection vs. frequency maximum power dissipation general the fan1582, fan1582-1.5, and fan1582-2.5 are three- terminal regulators optimized for gtl+ v tt termination and logic applications. these devices are short-circuit protected, and offer thermal shutdown to turn off the regulator when the junction temperature exceeds about 150c. the fan1582 series provides low dropout voltage and fast transient response. frequency compensation uses capacitors with low esr while still maintaining stability. this is critical in addressing the needs of low voltage high speed microproces- sor buses like gtl+. stability the fan1582 series requires an output capacitor as a part of the frequency compensation. it is recommended to use a 22f solid tantalum or a 100f aluminum electrolytic on the output to ensure stability. the frequency compensation of these devices optimizes the frequency response with low esr capaci- tors. in general, it is suggested to use capacitors with an esr of <1 w . it is also recommended to use bypass capacitors such as a 22f tantalum or a 100f aluminum on the adjust pin of the fan1582 for low ripple and fast transient response. when these bypassing capacitors are not used at the adjust pin, smaller values of output capacitors provide equally good results. protection diodes in normal operation, the fan1582 series does not require any protection diodes. for the fan1582, internal resistors limit internal current paths on the adjust pin. therefore, even with bypass capacitors on the adjust pin, no protection diode is needed to ensure device safety under short-circuit conditions.
fan1582 product specification 6 preliminary speci?cation a protection diode between the input and output pins is usu- ally not needed. an internal diode between the input and the output pins on the fan1582 series can handle microsecond surge currents of 50a to 100a. even with large value output capacitors it is dif?cult to obtain those values of surge cur- rents in normal operation. only with large values of output capacitance, such as 1000f to 5000f, and with the input pin instantaneously shorted to ground can damage occur. a crowbar circuit at the input can generate those levels of current; a diode from output to input is then recommended, as shown in figure 1. usually, normal power supply cycling or system hot plugging and unplugging will not generate current large enough to do any damage. the adjust pin can be driven on a transient basis 7v with respect to the output, without any device degradation. as with any ic regulator, exceeding the maximum input-to-output voltage differential causes the internal transistors to break down and none of the protection circuitry is then functional. figure 1. optional protection diode ripple rejection in applications that require improved ripple rejection, a bypass capacitor from the adjust pin of the fan1582 to ground reduces the output ripple by the ratio of v out /1.25v. the impedance of the adjust pin capacitor at the ripple frequency should be less than the value of r1 (typically in the range of 100 w to 120 w ) in the feedback divider network in figure 1. therefore, the value of the required adjust pin capacitor is a function of the input ripple frequency. for example, if r1 equals 100 w and the ripple frequency equals 120hz, the adjust pin capacitor should be 22f. at 10khz, only 0.22f is needed. output voltage the fan1582 regulator develops a 1.25v reference voltage between the output pin and the adjust pin (see figure 2). placing a resistor r1 between these two terminals causes a constant current to ?ow through r1 and down through r2 to set the overall output voltage. normally, this current is the speci?ed minimum load current of 10ma. the current out of the adjust pin adds to the current from r1 and is typically 35a. its output voltage contribution is small and only needs consideration when a very precise output voltage setting is required. figure 2. basic regulator circuit load regulation the fan1582 family provides true remote sensing, eliminat- ing output voltage errors due to trace resistance. to utilize remote sensing, connect the vsense pin directly to the load, rather than at the vout pin. if the load is more than 1" away from the fan1582, it may be necessary to increase the load capacitance to ensure stability. thermal considerations the fan1582 series protect themselves under overload con- ditions with internal power and thermal limiting circuitry. however, for normal continuous load conditions, do not exceed maximum junction temperature ratings. it is important to consider all sources of thermal resistance from junction-to- ambient. these sources include the junction-to-case resistance, the case-to-heat sink interface resistance, and the heat sink resistance. thermal resistance speci?cations have been developed to more accurately re?ect device temperature and ensure safe operating temperatures. the electrical character- istics section provides a separate thermal resistance and maximum junction temperature for both the control circuitry and the power transistor. calculate the maximum junction temperature for both sections to ensure that both thermal limits are met. for example, look at using an fan1582t-1.5 to generate 3a @ 1.5v 2% from a 3.3v source (3.2v to 3.6v). fan1582 adj c2 22 f v out + c1 10 f + c adj + vcntl vsense vin vout r1 r2 d1 1n4002 (optional) v in v out fan1582?.5, 2.5 gnd c2 22 f v out + c1 10 f + vcntl vsense vin vout d1 1n4002 (optional) v in v cntl c2 22 f v in v out v ref c1 10 f v cntl + + vcntl vsense vin adj vout fan1582 r1 r2 i adj 50 a v out = v ref (1+r2/r1) + i adj (r2)
product specification fan1582 7 preliminary speci?cation assumptions: ?v in = 3.6v worst case ?v out = 1.47v worst case ?i out = 3a continuous ?t a = 70c ? q case-to-ambient = 5c/w (assuming both a heatsink and a thermally conductive material) the power dissipation in this application is: p d = (v in - v out ) * (i out ) = (3.6-1.47) * (3) = 6.39w from the speci?cation table, t j = t a + (p d ) * ( q case-to-ambient + q jc ) = 70 + (6.39) * (5 + 3) = 121c the junction temperature is below the maximum rating. junction-to-case thermal resistance is speci?ed from the ic junction to the bottom of the case directly below the die. this is the lowest resistance path for heat ?ow. proper mounting ensures the best thermal ?ow from this area of the package to the heat sink. use of a thermally conductive material at the case-to-heat sink interface is recommended. use a thermally conductive spacer if the case of the device must be electri- cally isolated and include its contribution to the total thermal resistance. figure 3. application circuit (fan1582) table 1. bill of materials for application circuit for the fan1582 item quantity manufacturer part number description c1, c3 2 xicon l10v10 10f, 10v aluminum c2 1 xicon l10v100 100f, 10v aluminum c4 1 any 1f ceramic r1 1 generic 86.6 w , 1% r2 1 generic 124 w , 1% u1 1 fairchild fan1582t 3a regulator 100 f c2 10 f c3 v cntl = 5v 2.1v at 3a v in = 3.3v + 10 fc1 1 f c4 + v in v sense v cntl adj v out fan1582 86.6 124 r2 r1 u1
fan1582 product specification 8 preliminary speci?cation figure 4. application circuit (fan1582-1.5) table 2. bill of materials for application circuit for the rc1582-1.5 figure 5. application circuit (fan1582-2.5) table 3. bill of materials for application circuit for the rc1582-2.5 item quantity manufacturer part number description c1 1 xicon l10v10 10f, 10v aluminum c2 1 any 1f ceramic c3 1 xicon l10v100 100f, 10v aluminum u1 1 fairchild fan1582t-1.5 3a regulator item quantity manufacturer part number description c1 1 xicon l10v10 10f, 10v aluminum c2 1 any 1f ceramic c3 1 xicon l10v100 100f, 10v aluminum u1 1 fairchild fan1582t-2.5 3a regulator 100 f c3 v cntl = 3.3v 1.5v at 3a 10 f c1 v in = 2.5v + 1 f c2 + v in v sense v cntl adj u1 v out fan1582?.5 100 f c3 v cntl = 3.3v 1.5v at 3a 10 f c1 v in = 2.5v + 1 f c2 + + v in v sense v cntl adj u1 v out fan1582?.5
product specification fan1582 9 preliminary speci?cation mechanical dimensions 5-lead to-263 package g d e-pin a c b f -c- h e j r (2plcs) -a- -b- symbol inches millimeters min. max. min. max. a .380 .405 9.65 10.29 b .575 .625 14.60 15.88 c .325 .380 8.25 9.66 d C .055 C 1.40 e .020 .039 .50 .99 f .060 .072 1.52 1.83 g 0.45 .055 1.14 1.40 h .160 .190 4.06 4.83 j .090 0.110 2.28 2.80 k .018 .029 .457 .736 r .017 .019 0.43 0.48 notes: 1. dimensions are exclusive of mold flash and metal burrs. 2. standoff-height is measured from lead tip with ref. to datum Cb-. 3. foot length is measured with ref. to datum Ca- with lead surfac e (at inner r). 4. dimension exclusive of dambar protrusion or intrusion. 5. formed leads to be planar with respect to one another at seatin g place Cc-.
fan1582 product specification 10 preliminary speci?cation mechanical demensions (continued) 5-lead to-220 package a .140 .190 3.56 4.83 symbol inches min. max. min. max. millimeters notes b .025 .040 .63 1.02 c1 .140 .220 .356 .559 ? .139 .161 3.53 4.09 d .560 .650 14.22 16.51 .380 .420 9.65 10.67 .062 .072 1.57 1.83 e e e1 .263 .273 6.68 6.94 .045 .055 1.14 1.40 a f h1 .230 .270 5.84 6.87 .080 .115 2.04 2.92 .500 .580 12.70 14.73 j1 l .100 .135 .254 .343 3 7 3 7 q b l h1 q e e e1 e-pin ? c1 j1 d f a (5x) a notes: 1. dimension c1 apply for lead finish.
fan1582 product specification preliminary speci?cation 12/20/99 0.0m 001 stock#ds30001584 1998 fairchild semiconductor corporation life support policy fairchilds products are not authorized for use as critical components in life support devices or systems without the express written approval of the president of fairchild semiconductor corporation. as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2. a critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com ordering information product number package fan1582m to-263 fan1582t to-220 fan1582m-1.5 to-263 fan1582t-1.5 to-220 fan1582m-2.5 to-263 fan1582t-2.5 to-220
trademarks acex? coolfet? crossvolt? e 2 cmos tm fact? fact quiet series? fast ? fastr? gto? hisec? the following are registered and unregistered trademarks fairchild semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks. life support policy fairchild?s products are not authorized for use as critical components in life support devices or systems without the express written approval of fairchild semiconductor corporation. as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, or (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user. 2. a critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. product status definitions definition of terms datasheet identification product status definition advance information preliminary no identification needed obsolete this datasheet contains the design specifications for product development. specifications may change in any manner without notice. this datasheet contains preliminary data, and supplementary data will be published at a later date. fairchild semiconductor reserves the right to make changes at any time without notice in order to improve design. this datasheet contains final specifications. fairchild semiconductor reserves the right to make changes at any time without notice in order to improve design. this datasheet contains specifications on a product that has been discontinued by fairchild semiconductor. the datasheet is printed for reference information only. formative or in design first production full production not in production disclaimer fairchild semiconductor reserves the right to make changes without further notice to any products herein to improve reliability, function or design. fairchild does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights, nor the rights of others. syncfet? tinylogic? uhc? vcx? isoplanar? microwire? pop? powertrench qfet? qs? quiet series? supersot?-3 supersot?-6 supersot?-8 ? rev. d
preliminary information preliminary information describes products that are not in full production at the time of printing. specifications are based on design goals and limited characterization. they may change without notice. contact fairchild semiconductor for current information. www.fairchildsemi.com features ? fixed 2.500v, 3.300v, 4.096v, 5.000v, 8.192v, 10.000v ? tolerances to + 0.1% (25 c) ? low output noise ? low temperature coef?cient ? small packages ? extended operating current range applications ? portable equipment ? disk drives ? instrumentation ? audio equipment ? data acquisition systems description the fan4040 series of precision shunt references are ideal for space- and cost-sensitive applications. they are available in a variety of ?xed output voltages (2.500v, 3.300v, 4.096v, 5.000v, 8.192v, and 10.000v) and with a variety of output voltage tolerances (0.1%, 0.2%, 0.5%, 1%, and 2%). they also have excellent temperature coef?cients, to 100ppm/ c for the tighter tolerance grades. the fan4040 series has an extended operating current range, sinking as much as 25ma. the fan4040 series is available in sot-23, so-8, and to-92 packages. connection diagrams 1 2 + 3* *this pin must be left floating or connected to pin 2. 1 2 3 4 nc nc nc top view so-8 to-92 sot-23 bottom view top view + nc nc nc 8 7 6 5 + nc 1 2 3 fan4040 precision micropower shunt voltage reference rev. 0.8.4
advance speci?cation advance specification describes products that are in the design stage. specifications may change in any manner whatever without notice. contact fairchild semiconductor for current information. www.fairchildsemi.com features ? fixed 2.500v, 4.096v, 5.000v, 8.192v, 10.000v ? tolerances to + 0.1% (25 c) ? low output noise ? low temperature coef?cient ? small packages: ssot-23 ? extended operating current range applications ? portable equipment ? disk drives ? instrumentation ? audio equipment ? data acquisition systems description the fan4050 series of precision shunt references are ideal for space- and cost-sensitive applications. they are available in a variety of ?xed output voltages (2.500v, 4.096v, 5.000v, 8.192v, and 10.000v) and with a variety of output voltage tolerances (0.1%, 0.2%, and 0.5%). they also have excellent temperature coef?cients, 50ppm/ c. the fan4050 series is available in the ssot-23 package. connection diagram 1 2 + 3* *this pin must be left floating or connected to pin 2. ssot-23 top view fan4050 precision micropower shunt voltage reference rev. 0.6.0
fan4050 2 advance speci?cation absolute maximum ratings 1 ratings are over full operating free-air temperature range unless otherwise noted. notes: 1. functional operation under these conditions is not implied. permanent damage may occur if the device is subjected to conditions outside these ratings. 2. it is recommended to connect pin 3 to pin 2 in the ssot23 package to ensure optimal thermal performance. recommended operating conditions equivalent schematic parameter min. max. unit continuous cathode current, i k -10 20 ma power dissipation 2 280 mw storage temperature range -65 150 c lead temperature (soldering, 10 sec.) 300 c parameter min. max. unit continuous cathode current, i k 0.1 15 ma operating temperature range in free air, t a -40 85 c v ref = 1.24v + _ cathode anode
fan4050 3 advance speci?cation guaranteed electrical characteristics, fan4050-2.5 (t a = 25 c unless otherwise speci?ed, in free air) the denotes speci?cations which apply over the full operating temperature range. *typical. guaranteed electrical characteristics, fan4050-4.1 (t a = 25 c unless otherwise speci?ed, in free air) the denotes speci?cations which apply over the full operating temperature range. *typical. symbol parameter conditions limits units abc v r reverse breakdown voltage i k = 100a 2.500 2.500 2.500 v* tcv r reverse breakdown voltage tolerance i k = 100a 2.5 11 5.0 14 13 21 mv mv i rmin minimum operating current 65 65 65 a d v r / d t reverse breakdown voltage temperature coefficient i k = 100a 50 50 50 ppm/ c d v r ( d i k ) reverse breakdown voltage change with operating current i rmin i k 1ma 1ma i k 15ma 1.2 8.0 1.2 8.0 1.2 8.0 mv mv z ka reverse dynamic impedance i k =1ma, f=120hz, i ac =0.1i k 0.3 0.3 0.3 w * e n wideband noise i k =100a, 10hz f 10khz 41 41 41 v rms * d v r reverse breakdown voltage long-term stability t=1000hrs, t=25c, i k =100a 120 120 120 ppm* symbol parameter conditions limits units abc v r reverse breakdown voltage i k = 100a 4.096 4.096 4.096 v* tcv r reverse breakdown voltage tolerance i k = 100a 4.1 18 8.2 22 21 34 mv mv i rmin minimum operating current 73 73 73 a d v r / d t reverse breakdown voltage temperature coefficient i k = 100a 50 50 50 ppm/ c d v r ( d i k ) reverse breakdown voltage change with operating current i rmin i k 1ma 1ma i k 15ma 1.2 10 1.2 10 1.2 10 mv mv z ka reverse dynamic impedance i k =1ma, f=120hz, i ac =0.1i k 0.5 0.5 0.5 w * e n wideband noise i k =100a, 10hz f 10khz 93 93 93 v rms * d v r reverse breakdown voltage long-term stability t=1000hrs, t=25c, i k =100a 120 120 120 ppm*
fan4050 4 advance speci?cation guaranteed electrical characteristics, fan4050-5.0 (t a = 25 c unless otherwise speci?ed, in free air) the denotes speci?cations which apply over the full operating temperature range. *typical. guaranteed electrical characteristics, fan4050-8.2 (t a = 25 c unless otherwise speci?ed, in free air) the denotes speci?cations which apply over the full operating temperature range. *typical. symbol parameter conditions limits units abc v r reverse breakdown voltage i k = 100a 5.000 5.000 5.000 v* tcv r reverse breakdown voltage tolerance i k = 100a 5.0 22 10 27 25 42 mv mv i rmin minimum operating current 80 80 80 a d v r / d t reverse breakdown voltage temperature coefficient i k = 100a 50 50 50 ppm/ c d v r ( d i k ) reverse breakdown voltage change with operating current i rmin i k 1ma 1ma i k 15ma 1.4 12 1.4 12 1.4 12 mv mv z ka reverse dynamic impedance i k =1ma, f=120hz, i ac =0.1i k 0.5 0.5 0.5 w * e n wideband noise i k =100a, 10hz f 10khz 93 93 93 v rms * d v r reverse breakdown voltage long-term stability t=1000hrs, t=25c, i k =100a 120 120 120 ppm* symbol parameter conditions limits units abc v r reverse breakdown voltage i k = 150a 8.192 8.192 8.192 v* tcv r reverse breakdown voltage tolerance i k = 150a 8.2 35 16 43 41 68 mv mv i rmin minimum operating current 95 95 95 a d v r / d t reverse breakdown voltage temperature coefficient i k = 150a 50 50 50 ppm/ c d v r ( d i k ) reverse breakdown voltage change with operating current i rmin i k 1ma 1ma i k 15ma 2.5 18 2.5 18 2.5 18 mv mv z ka reverse dynamic impedance i k =1ma, f=120hz, i ac =0.1i k 0.6 0.6 0.6 w * e n wideband noise i k =150a, 10hz f 10khz 150 150 150 v rms * d v r reverse breakdown voltage long-term stability t=1000hrs, t=25c, i k =150a 120 120 120 ppm*
fan4050 5 advance speci?cation guaranteed electrical characteristics, fan4050-10 (t a = 25 c unless otherwise speci?ed, in free air) the denotes speci?cations which apply over the full operating temperature range. *typical. symbol parameter conditions limits units abc v r reverse breakdown voltage i k = 150a 10.00 10.00 10.00 v* tcv r reverse breakdown voltage tolerance i k = 150a 10 43 20 53 50 83 mv mv i rmin minimum operating current 103 103 103 a d v r / d t reverse breakdown voltage temperature coefficient i k = 150a 50 50 50 ppm/ c d v r ( d i k ) reverse breakdown voltage change with operating current i rmin i k 1ma 1ma i k 15ma 3.5 23 3.5 23 3.5 23 mv mv z ka reverse dynamic impedance i k =1ma, f=120hz, i ac =0.1i k 0.7 0.7 0.7 w * e n wideband noise i k =150a, 10hz f 10khz 150 150 150 v rms * d v r reverse breakdown voltage long-term stability t=1000hrs, t=25c, i k =150a 120 120 120 ppm*
fan4050 6 advance speci?cation mechanical dimensions ssot-23 package a .035 .044 symbol inches min. max. min. max. millimeters notes a1 .0005 .004 .020 b .015 c .003 .007 e .047 .055 e .027 bsc h .083 .104 .035 .041 .070 .080 .018 .024 e1 l s d .110 .120 .89 1.02 .013 .10 .51 .37 .085 .18 1.20 1.40 .69 bsc 2.10 2.64 .89 1.03 1.78 2.05 .45 .60 2.80 3.04 notes: 1. 2. 3. 4. dimensions are inclusive of plating. dimensions are exclusive of mold flash & metal burr. comply to jedec to-236. this drawing is for matrix leadframe only. d e1 s e e a a1 b h l c
fan4050 advance speci?cation 12/15/99 0.0m 002 stock#ds30004040 1999 fairchild semiconductor corporation disclaimer fairchild semiconductor reserves the right to make changes without further notice to any products herein to improve reliability, function or design. fairchild does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights, nor the rights of others. life support policy fairchilds products are not authorized for use as critical components in life support devices or systems without the express written approval of the president of fairchild semiconductor corporation. as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, or (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user. 2. a critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com ordering information example: fan4050 a i s3-5.0 fan4050 a i s3 C 5.0 grade package voltage 0.1% = a ssot23 = s3 2.5v = 2.5 0.2% = b 4.096v = 4.1 0.5% = c 5.0v = 5.0 8.192v = 8.2 10v = 10.0 ssot-23 package marking information only 3 ?elds of marking are possible on an ssot-23. this table gives the meaning of these ?elds. example: f5a f5 a voltage grade 2.5v = 2 0.1% = a 4.096v = 4 0.2% = b 5.0v = 5 0.5% = c 8.192v = 8 10v = 0
trademarks acex? coolfet? crossvolt? e 2 cmos tm fact? fact quiet series? fast ? fastr? gto? hisec? the following are registered and unregistered trademarks fairchild semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks. life support policy fairchild?s products are not authorized for use as critical components in life support devices or systems without the express written approval of fairchild semiconductor corporation. as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, or (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user. 2. a critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. product status definitions definition of terms datasheet identification product status definition advance information preliminary no identification needed obsolete this datasheet contains the design specifications for product development. specifications may change in any manner without notice. this datasheet contains preliminary data, and supplementary data will be published at a later date. fairchild semiconductor reserves the right to make changes at any time without notice in order to improve design. this datasheet contains final specifications. fairchild semiconductor reserves the right to make changes at any time without notice in order to improve design. this datasheet contains specifications on a product that has been discontinued by fairchild semiconductor. the datasheet is printed for reference information only. formative or in design first production full production not in production disclaimer fairchild semiconductor reserves the right to make changes without further notice to any products herein to improve reliability, function or design. fairchild does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights, nor the rights of others. syncfet? tinylogic? uhc? vcx? isoplanar? microwire? pop? powertrench qfet? qs? quiet series? supersot?-3 supersot?-6 supersot?-8 ? rev. d
preliminary specification describes products that are not in full production at the time of printing. specifications are based on design goals and limited characterization. in the process of final product release, specification. contact fairchild semiconductor for current i nformation. preliminary speci?cation www.fairchildsemi.com pentium is a registered trademark of intel corporation. rev. 0.8.1 features programmable output for vcore from 1.3v to 3.5v using an integrated 5-bit dac controls adjustable linears for vtt (1.5v), and vclock (2.5v) meets vrm specitcation with as few as 5 capacitors meets 1.550v +40/-70mv over initial tolerance, temperature and transients remote sense active droop drives n-channel mosfets overcurrent protection using mosfet sensing 85% eftciency typical at full load integrated power good and enable/soft start functions 20 pin soic package applications power supply for pentium ii camino platform power supply for pentium ii whitney platform vrm for pentium iii processor programmable multi-output power supply description the fan5061 is a synchronous mode dc-dc controller ic which provides a highly accurate, programmable set of output voltages for multi-voltage platforms such as the intel camino, and provides a complete solution for the intel whitney and other high-performance processors. the fan5061 features remote voltage sensing, independently adjustable current limit, and active droop for optimal converter transient response. the fan5061 uses a 5-bit d/a converter to program the output voltage from 1.3v to 3.5v. the fan5061 uses a high level of integration to deliver load currents in excess of 16a from a 5v block diagram vid3 vid2 vid1 13 vid0 gndp 19 18 2 15 20 1 14 - + - + osc 1.24v reference digital control power good 5-bit dac vid4 87654 +5v +12v pwrgd - + enable/ss vcc gnda 3 lodrv hidrv vccp 17 vcca +5v 16 - ref ref pwrgd, ocl pwrgd, ocl +3.3v +1.5v 10 9 +2.5v 12 11 ocl - + vccp r s + - + fan5061 high performance programmable synchronous dc-dc controller for multi-voltage platforms
fan5061 2 preliminary speci?cation source with minimal external circuitry. synchronous-mode operation offers optimum ef?ciency over the entire speci?ed output voltage range. an on-board precision low tc reference achieves tight tolerance voltage regulation without expensive external components, while active droop permits exact tailor- ing of voltage for the most demanding load transients. the fan5061 includes linear regulator controllers for vtt termina- tion (1.5v), and vclock (2.5v), each adjustable with an exter- nal divider. the fan5061 also offers integrated functions including power good, output enable/soft start and current limiting, and is available in a 20 pin soic package. pin assignments 20 19 18 17 16 15 14 13 12 11 fan5061 hidrv sw gnda vid4 vid3 vid2 vid1 vid0 vttgate vttfb vccp lodrv gndp vcca vfb igb pwrgd ss/enable vcufb vcugate 1 2 3 4 5 6 7 8 9 10 pin de?nitions pin number pin name pin function description 1 hidrv high side fet driver. connect this pin through a resistor to the gate of an n-channel mosfet. the trace from this pin to the mosfet gate should be <0.5". 2sw high side driver source and low side driver drain switching node. together with droop and ilim pins allows fet sensing for vcc current. 3 gnda analog ground. return path for low power analog circuitry. this pin should be connected to a low impedance system ground plane to minimize ground loops. 4-8 vid0-4 voltage identification code inputs. these open collector/ttl compatible inputs will program the output voltage over the ranges specified in table 2. pull-up resistors are internal to the controller. 9 vttgate gate driver for vtt transistor. for 1.5v output. 10 vttfb voltage feedback for vtt. 11 vckgate gate driver for vck transistor. for 2.5v output. 12 vckfb voltage feedback for vck. 13 enable/ss output enable. a logic low on this pin will disable all outputs. an internal current source allows for open collector control. this pin also doubles as soft start for all outputs. 14 pwrgd power good flag. an open collector output that will be logic low if any output voltage is not within 12% of the nominal output voltage setpoint. 15 ifb vcc current feedback. pin 15 is used in conjunction with pin 2 as the input for the vcc current feedback control loop. layout of these traces is critical to system performance. see application information for details. 16 vfb vcc voltage feedback. pin 16 is used as the input for the vcc voltage feedback control loop. see application information for details regarding correct layout. 17 vcca analog vcc. connect to system 5v supply and decouple with a 0.1f ceramic capacitor. 18 gndp power ground. return pin for high currents flowing in pin 20 (vccp). 19 lodrv vcc low side fet driver. connect this pin through a resistor to the gate of an n-channel mosfet for synchronous operation. the trace from this pin to the mosfet gate should be <0.5". 20 vccp power vcc. for all fet drivers. connect to system 12v supply through a 33 w , and decouple with a 1f ceramic capacitor.
fan5061 3 preliminary speci?cation absolute maximum ratings note: 1. component mounted on demo board in free air. recommended operating conditions supply voltages vcca, vccp to gnd 13.5v voltage identification code inputs, vid0-vid4 vcca all other pins 13.5v junction temperature, t j 150c storage temperature -65 to 150c lead soldering temperature, 10 seconds 300c thermal resistance junction-to-ambient, q ja 1 75c/w parameter conditions min. typ. max. units supply voltage vcca 4.75 5 5.25 v input logic high 2.0 v input logic low 0.8 v ambient operating temperature 0 70 c output driver supply, vccp 10.8 12 13.2 v electrical speci?cations (v cca = 5v, v ccp = 12v, v out = 2.0v, and t a = +25c using circuit in figure 1 unless otherwise noted.) the ? denotes speci?cations which apply over the full operating temperature range. parameter conditions min. typ. max. units vcc regulator output voltage see table 1 ? 1.3 3.5 v output current 18 a initial voltage setpoint i load = 0.8a,v out = 2.400v v out = 2.000v v out = 1.550v 2.397 2.000 1.550 2.424 2.020 1.565 2.454 2.040 1.580 v v v output temperature drift t a = 0 to 70c,v out = 2.000v v out = 1.550v ? ? +8 +6 mv mv line regulation v in = 4.75v to 5.25v ? -4 mv/v internal droop impedance i load = 0.8a to 12.5a 13.0 14.4 15.8 k w maximum droop 60 mv output ripple 20mhz bw, i load = 18a 11 mvpk total output variation, steady state 1 v out = 2.000v v out = 1.550v 3 ? ? 1.940 1.480 2.070 1.590 v total output variation, transient 2 i load = 0.8a to 18a, v out = 2.000v v out = 1.550v 3 ? ? 1.900 1.480 2.100 1.590 v short circuit detect current ? 45 50 60 a efficiency i load = 18a, v out = 2.0v 85 %
fan5061 4 preliminary speci?cation notes: 1. steady state voltage regulation includes initial voltage setpoint, droop, output ripple and output temperature drift and is measured at the converters vfb sense point. 2. as measured at the converters vfb sense point. for motherboard applications, the pcb layout should exhibit no more than 0.5m w trace resistance between the converters output capacitors and the cpu. remote sensing should be used for optimal performance. output driver rise & fall time see figure 3 50 nsec output driver deadtime see figure 3 50 nsec duty cycle 0 100 % 5v uvlo ? 3.74 4 4.26 v 12v uvlo ? 7.65 8.5 9.35 v soft start current ? 5 10 17 a vtt linear regulator output voltage i load 2a ? 1.425 1.5 1.575 v under voltage trip level over current 80 %v o vclk linear regulator output voltage i load 2a ? 2.375 2.5 2.625 v under voltage trip level over current 80 %v o common functions oscillator frequency ? 255 310 345 khz pwrgd threshold logic high, all outputs logic low, any output ? ? 93 88 107 112 %v out linear regulator under voltage delay time over current 30 sec electrical speci?cations (continued) (v cca = 5v, v ccp = 12v, v out = 2.0v, and t a = +25c using circuit in figure 1 unless otherwise noted.) the ? denotes speci?cations which apply over the full operating temperature range. parameter conditions min. typ. max. units
fan5061 5 preliminary speci?cation note: 1. 0 = processor pin is tied to gnd. 1 = processor pin is open. table 1. output voltage programming codes vid4 vid3 vid2 vid1 vid0 nominal v out 01111 1.30v 01110 1.35v 01101 1.40v 01100 1.45v 01011 1.50v 01010 1.55v 01001 1.60v 01000 1.65v 00111 1.70v 00110 1.75v 00101 1.80v 00100 1.85v 00011 1.90v 00010 1.95v 00001 2.00v 00000 2.05v 11111 2.0v 11110 2.1v 11101 2.2v 11100 2.3v 11011 2.4v 11010 2.5v 11001 2.6v 11000 2.7v 10111 2.8v 10110 2.9v 10101 3.0v 10100 3.1v 10011 3.2v 10010 3.3v 10001 3.4v 10000 3.5v
fan5061 6 preliminary speci?cation typical operating characteristics (v cca = 5v, v ccp = 12v, and t a = +25c using circuits in figure 1, unless otherwise noted.) droop, v cpu = 2.0v, r d = 8k v out (v) v out (v) v cpu (v) v cpu (v) 2.04 2.03 2.02 2.01 2.00 1.99 1.98 1.97 1.96 1.95 1.94 0 3 6 9 12 15 18 output current (a) output programming, vid4 = 1 3.5 3.0 2.5 2.0 1.5 1.0 dac setpoint 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3.0 3.1 3.2. 3.3 3.4 3.5 v cpu efficiency vs. output current 88 86 84 82 80 78 76 74 72 70 68 66 64 output current (a) 0 3 6 9 12 15 18 v out = 1.550v v out = 2.000 v efficiency (%) output programming, vid4 = 0 2.1 1.9 1.7 1.5 1.3 1.1 dac setpoint 1.30 1.40 1.50 1.60 1.70 1.80 1.90 2.00 0 5 10 15 20 25 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 cpu output voltage vs. output current output current (a)
fan5061 7 preliminary speci?cation typical operating characteristics (continued) output ripple, 2.0v @ 18a time (1 s/div) time (1 s/div) v cpu (20mv/div) v cpu (50mv/div) v cpu (50mv/div) v cpu (1v/div) v in (2v/div) hidrv pin lodrv pin 5v/div 5v/div output startup, system power-up transient res p onse , 12.5a to 0.5a 1.590v 1.550v 1.480v 1.590v 1.550v 1.480v time (100 s/div) time (100 s/div) time (10ms/div) switching waveforms, 18a load output startup from enable v cpu (1v/div) enable (2v/div) time (10ms/div) transient response, 0.5a to 12.5a
fan5061 8 preliminary speci?cation typical operating characteristics (continued) application circuit figure 1. application circuit for katmai/camino/bx/zx motherboards (worst case analyzed! see appendix for details ) 0 25 70 100 temperature ( c) 2.042 2.040 2.038 2.036 2.034 2.030 2.028 2.026 v cpu (v) linear regulator noise ac coupled v out (10mv/div) time (100 s/div) 9 1 2 3 4 5 6 7 8 10 11 12 13 14 15 16 20 19 18 17 +5v l1 (optional) c in * q1 c2 c1 vid3 vid4 3.3v in enable/ss 1.5v? vid2 vid1 vid0 q2 q4 q3 d1 l2 c out * vo r6 r7 r2 r3 c8 c10 c7 c4 c11 c3 pwrgd vcc +12v 2.5v? c5 c6 r4 r1 u1 fan5061 * refer to table 4 for values of c out and c in . ? adjustable with an external divider.
fan5061 9 preliminary speci?cation table 2. fan5061 application bill of materials for intel katmai/camino/bx/zx motherboards (components based on worst case analysissee appendix for details) notes: 1. inductor l1 is recommended to isolate the 5v input supply from noise generated by the mosfet switching, and to comply with intel di/dt requirements. l1 may be omitted if desired. 2. for 17.4a designs using the to-220 mosfets, heatsinks with thermal resistance q sa < 20c/ w should be used. for designs using the to-263 mosfets, adequate copper area should be used. for details and a spreadsheet on mosfet selections, refer to applications bulletins ab-8 and ab-15. *refer to table for values. reference manufacturer part # quantity description requirements/comments c1 avx tajb475m010r5 1 4.7f, 10v capacitor c2, c5 panasonic ecu-v1c105zfx 2 1f, 16v capacitor c3-4,c6 panasonic ecu-v1h104zfx 3 100nf, 50v capacitor c8-9 sanyo 6mv1000fa 2 1000f, 6.3v electrolytic c10-11 any 2 22f, 6.3v capacitor low esr c in sanyo 10mv1200gx * 1200f, 10v electrolytic i rms = 2a c out sanyo 6mv1500gx * 1500f, 6.3v electrolytic esr 44m w d1 motorola mbrd835l 1 8a schottky diode l1 any optional 2.5h, 8a inductor dcr ~ 10m w see note 1. l2 any 1 1.3h, 20a inductor dcr ~ 2m w q1 fairchild fdp6030l or fdb6030l 1 n-channel mosfet (to-220 or to-263) r ds(on) = 20m w @ v gs = 4.5v see note 2. q2 fairchild fdp7030bl or fdb7030bl 1 n-channel mosfet (to-220 or to-263) r ds(on) = 10m w @ v gs = 4.5v see note 2. q3-4 fairchild fdb4030l 2 n-channel mosfet r1 any 1 33 w r2-3 any 2 4.7 w r4 any 1 10k w r6 any 1 10 w r7 any 1 * u1 fairchild fan5061m 1 dc/dc controller
fan5061 10 preliminary speci?cation figure 2. application circuit for coppermine/camino motherboards (typical design) 9 1 2 3 4 5 6 7 8 10 11 12 13 14 15 16 20 19 18 17 +5v l1 (optional) c in * q1 c2 c1 vid3 vid4 3.3v in enable/ss 1.5v? vid2 vid1 vid0 q2 q5 q3 d1 l2 c out * vo *refer to table 3 for values of c out , and c in . r6 r2 r7 r10 r3 c8 c7 c11 c4 c3 pwrgd vcc +12v 2.5v? c5 c6 r4 r1 r8 u1 fan5061 ? adjustable with an external divider. c10
fan5061 11 preliminary speci?cation table 3. fan5061 application bill of materials for intel coppermine/camino motherboards (typical design) notes: 1. inductor l1 is recommended to isolate the 5v input supply from noise generated by the mosfet switching, and to comply with intel di/dt requirements. l1 may be omitted if desired. 2. for 12.5a designs using the to-220 mosfets, heatsinks with thermal resistance q sa < 20c/ w should be used. for designs using the to-263 mosfets, adequate copper area should be used. for details and a spreadsheet on mosfet selections, refer to applications bulletins ab-8 and ab-15. reference manufacturer part # quantity description requirements/comments c1 avx tajb475m010r5 1 4.7f, 10v capacitor c2, c5 panasonic ecu-v1c105zfx 2 1f, 16v capacitor c3-4,c6 panasonic ecu-v1h104zfx 3 100nf, 50v capacitor c8-9 sanyo 6mv1000fa 2 1000f, 6.3v electrolytic c10-11 any 2 22f, 6.3v capacitor low esr c in sanyo 10mv1200gx 3 1200f, 10v electrolytic i rms = 2a c out sanyo 6mv1500gx 12 1500f, 6.3v electrolytic esr 44m w d1 motorola mbrd835l 1 8a schottky diode l1 any optional 2.5h, 5a inductor dcr ~ 10m w see note 1. l2 any 1 1.3h, 15a inductor dcr ~ 3m w q1 fairchild fdp6030l or fdb6030l 1 n-channel mosfet (to-220 or to-263) r ds(on) = 20m w @ v gs = 4.5v see note 2. q2 fairchild fdp7030bl or fdb7030bl 1 n-channel mosfet (to-220 or to-263) r ds(on) = 10m w @ v gs = 4.5v see note 2. q3-4 fairchild fdb4030l 2 n-channel mosfet r1 any 1 33 w r2-3 any 2 4.7 w r4 any 1 10k w r6 any 1 10 w r7 any 1 6.24k w r8 n/a 1 30m w pcb trace resistor u1 fairchild fan5061m 1 dc/dc controller
fan5061 12 preliminary speci?cation application circuit summary table 4 summarizes the worst-case design schematics presented in this section. the basic choices are: a) the processor, b) the chipset used, and c) the use or not of a sense resistor. depending on board layout and component selection, it may be possible to use fewer output capacitors than shown here. for con?gurations not shown in this datasheet, consult the appendix for selection of component values. table 4. recommended values for cpu-based applications *output capacitance requirements depend critically on layout and processor type. consult application bulletin ab-14 for details . see the appendix to this datasheet for the method of calculation of these components. pin 4 must be used to remote sense the voltage at the processor to achieve the specified performance. processor chipset c in c out * r5, r7 (k w ) coppermine whitney 3 4 8.45 katmai camino 4 6 13.0 mendocino whitney 4 5 11.3 katmai bx 5 6 11.8 test parameters figure 3. ouput drive timing diagram application information the fan5061 controller the fan5061 is a programmable synchronous dc-dc con- troller ic. when designed around the appropriate external components, the fan5061 can be con?gured to deliver more than 16a of output current, as appropriate for the katmai and coppermine and other processors. the fan5061 functions as a ?xed frequency pwm step down regulator. main control loop refer to the fan5061 block diagram on page 1. the fan5061 implements summing mode control, which is different from both classical voltage-mode and current-mode control. it provides superior performance to either by allowing a large converter bandwidth over a wide range of output loads. the control loop of the regulator contains two main sections: the analog control block and the digital control block. the analog section consists of signal conditioning ampli?ers feeding into a comparator which provides the input to the digital control block. the signal conditioning section accepts input from the droop (current feedback) and vfb (voltage feedback) pins and sets up two controlling signal paths. the ?rst, the voltage control path, ampli?es the difference between the vfb signal and the reference voltage from the dac and presents the output to one of the summing ampli?er inputs. the second, current control path, takes the difference between the droop and sw pins when the high-side mosfet is on, reproducing the voltage across the mosfet and thus the input current; it presents the resulting signal to another input of the summing ampli?er. these two signals are then summed together. this output is then presented to a comparator looking at the oscillator ramp, which provides the main pwm control signal to the digital control block. the digital control block takes the analog comparator input and the main clock signal from the oscillator to provide the appropriate pulses to the hidrv and lodrv output pins. these two outputs control the external power mosfets. there is an additional comparator in the analog control section whose function is to set the point at which the fan5061 cur- rent limit comparator disables the output drive signals to the external power mosfets. high current output drivers the fan5061 contains two identical high current output driv- ers that utilize high speed bipolar transistors in a push-pull con?guration. the drivers power and ground are separated from the chips power and ground for switching noise immu- nity. the power supply pin, vccp, is supplied from an exter- nal 12v source through a series 33 w resistor. the resulting voltage is suf?cient to provide the gate to source drive to the external mosfets required in order to achieve a low r ds,on . internal voltage reference the reference included in the fan5061 is a precision band-gap voltage reference. its internal resistors are precisely trimmed to provide a near zero temperature coef?cient (tc). based on the reference is the output from an integrated 5-bit dac. the dac monitors the 5 voltage identi?cation pins, vid0-4. when the vid4 pin is at logic high, the dac scales the reference voltage from 2.0v to 3.5v in 100mv increments. when vid4 t r 5v t dt t dt t f hidrv to sw lodrv 2v 2v 2v 5v 2v
fan5061 13 preliminary speci?cation is pulled low, the dac scales the reference from 1.30v to 2.05v in 50mv increments. all vid codes are available, includ- ing those below 1.80v. power good (pwrgd) the fan5061 power good function is designed in accor- dance with the pentium ii dc-dc converter speci?cations and provides a continuous voltage monitor on the vfb pin. the circuit compares the vfb signal to the vref voltage and outputs an active-low interrupt signal to the cpu should the power supply voltage deviate more than 12% of its nominal setpoint. the power good ?ag provides no other control function to the fan5061. output enable/soft start (enable/ss) the fan5061 will accept an open collector/ttl signal for controlling the output voltage. the low state disables the output voltage. when disabled, the pwrgd output is in the low state. even if an enable is not required in the circuit, this pin should have attached a capacitor (typically 100nf) to softstart the switching. over-voltage protection the fan5061 constantly monitors the output voltage for pro- tection against over-voltage conditions. if the voltage at the vfb pin exceeds the selected program voltage, an over-volt- age condition is assumed and the fan5061 disables the out- put drive signal to the external high-side mosfet. the dc- dc converter returns to normal operation after the output voltage returns to normal levels. oscillator the fan5061 oscillator section uses a ?xed frequency of operation of 300khz. design considerations and component selection additional information on design and component selection may be found in fairchilds application note 57. mosfet selection this application requires n-channel logic level enhancement mode field effect transistors. desired characteristics are as follows: low static drain-source on-resistance, r ds,on < 20m w (lower is better) low gate drive voltage, v gs = 4.5v rated power package with low thermal resistance drain-source voltage rating > 15v. the on-resistance (r ds,on) is the primary parameter for mosfet selection. the on-resistance determines the power dissipation within the mosfet and therefore signi?cantly affects the ef?ciency of the dc-dc converter. for details and a spreadsheet on mosfet selection, refer to applica- tions bulletin ab-8. inductor selection choosing the value of the inductor is a tradeoff between allowable ripple voltage and required transient response. the system designer can choose any value within the allowed minimum to maximum range in order to either minimize ripple or maximize transient performance. the ?rst order equation (close approximation) for minimum inductance is: where: v in = input power supply v out = output voltage f = dc/dc converter switching frequency esr = equivalent series resistance of all output capacitors in parallel v ripple = maximum peak to peak output ripple voltage budget. the ?rst order equation for maximum allowed inductance is: where: c o = the total output capacitance i pp = maximum to minimum load transient current v tb = the output voltage tolerance budget allocated to load transient d m = maximum duty cycle for the dc/dc converter (usually 95%). some margin should be maintained away from both l min and l max . adding margin by increasing l almost always adds expense since all the variables are predetermined by system performance except for c o , which must be increased to increase l. adding margin by decreasing l can be done by purchasing capacitors with lower esr. the fan5061 pro- vides signi?cant cost savings for the newer cpu systems that typically run at high supply current. fan5061 short circuit current characteristics the fan5061 protects against output short circuit on the core supply by turning off both the high-side and low-side mosfets. the fan5061 short circuit current characteristic includes a hysteresis function that prevents the dc-dc converter from oscillating in the event of a short circuit. the short circuit limit is set with the r s resistor, as given by the formula l min (v in ?v out ) f x v out v in x esr v ripple = l max (v in ?v out ) d m v tb i pp 2 = 2c o r s i sc *r ds, on i detect =
fan5061 14 preliminary speci?cation with i detect ? 50a, i sc is the desired current limit, and r ds,on the high-side mosfets on resistance. remember to make the r s large enough to include the effects of initial tol- erance and temperature variation on the mosfets r ds,on . alternately, use of a sense resistor in series with the source of the mosfet eliminates this source of inaccuracy in the current limit. as an example, figure 4 shows the typical characteristic of the dc-dc converter circuit with an fdb6030l high-side mosfet (r ds = 20m w maximum at 25c * 1.25 at 75c = 25m w ) and a 8.2k w r s . figure 4. fan5061 short circuit characteristic the converter exhibits a normal load regulation characteristic until the voltage across the mosfet exceeds the internal short circuit threshold of 50a * 8.2k w = 410mv, which occurs at 410mv/25m w = 16.4a. (note that this current limit level can be as high as 410mv/15m w = 27a, if the mosfet has typical r ds,on rather than maximum, and is at 25c). if the current exceeds this limit for more than 30sec, the fan5061 shuts down all of its outputs, including its linear regulators. they remain shut down until power is recycled. similarly, if any of the linear regulator outputs are loaded heavily enough that their output voltage drops below 80% of nominal, all fan5061 outputs, including the switcher, are shut off and remain off until power is recycled. schottky diode selection the application circuit of figure 1 shows a schottky diode, d1, which is used as a free-wheeling diode to assure that the body-diode in q2 does not conduct when the upper mosfet is turning off and the lower mosfet is turning on. it is undesirable for this diode to conduct because its high forward voltage drop and long reverse recovery time degrades ef?ciency, and so the schottky provides a shunt path for the current. since this time duration is very short, the selection criterion for the diode is that the forward voltage of the schottky at the output current should be less than the forward voltage of the mosfets body diode. output filter capacitors the output bulk capacitors of a converter help determine its output ripple voltage and its transient response. it has already been seen in the section on selecting an inductor that the esr helps set the minimum inductance, and the capacitance value helps set the maximum inductance. for most converters, however, the number of capacitors required is determined by the transient response and the output ripple voltage, and these are determined by the esr and not the capacitance value. that is, in order to achieve the necessary esr to meet the transient and ripple requirements, the capacitance value required is already very large. the most commonly used choice for output bulk capacitors is aluminum electrolytics, because of their low cost and low esr. the only type of aluminum capacitor used should be those that have an esr rated at 100khz. consult application bulletin ab-14 for detailed information on output capacitor selection. the output capacitance should also include a number of small value ceramic capacitors placed as close as possible to the processor; 0.1f and 0.01f are recommended values. input filter the dc-dc converter design may include an input inductor between the system +5v supply and the converter input as shown in figure 5. this inductor serves to isolate the +5v supply from the noise in the switching portion of the dc-dc converter, and to limit the inrush current into the input capac- itors during power up. a value of 2.5h is recommended. it is necessary to have some low esr aluminum electrolytic capacitors at the input to the converter. these capacitors deliver current when the high side mosfet switches on. figure 5 shows 3 x 1000f, but the exact number required will vary with the speed and type of the processor. for the top speed katmai and coppermine, the capacitors should be rated to take 9a and 6a of ripple current respectively. capacitor ripple current rating is a function of temperature, and so the manufacturer should be contacted to ?nd out the ripple current rating at the expected operational temperature. for details on the design of an input ?lter, refer to applica- tions bulletin ab-15. figure 8. input filter v out (v) output current (a) 0 5 10 15 20 25 2.5 h 5v 0.1 f 1000 f, 10v electrolytic vin
fan5061 15 preliminary speci?cation active droop ? the fan5061 includes active droop; as the ouptut current increases, the output voltage drops. this is done in order to allow maximum headroom for transient response of the con- verter. the current is sensed by measuring the voltage across the high-side mosfet during its on time. note that this makes the droop dependent on the temperature of the mosfet. how- ever, when the formula given for selecting r s (current limit) is used, there is a maximum droop possible (-40mv), and when this value is reached, additional drop across the mosfet will not cause any increase in droopuntil current limit is reached. additional droop can be added to the active droop using a discrete resistor (typically a pcb trace) outside the control loop, as shown in figure 2. this is typically only required for the most demanding applications, such as for the next gener- ation intel processor (tolerance = +40/-70mv), as shown in figure 2. remote sense the fan5061 offers remote sense of the output voltage to minimize the output capacitor requirements of the converter. it is highly recommended that the remote sense pin, pin 16, be tied directly to the processor power pins, so that the effects of power plane impedance are eliminated. further details on use of the remote sense feature of the fan5061 may be found in applications bulletin ab-24. adjusting the linear regulators output voltages any or all of the linear regulators outputs may be adjusted high to compensate for voltage drop along traces, as shown in figure 6. figure 6. adjusting the output voltage of the linear regulator the resistor value should be chosen as for example, to get the v tt voltage to be 1.55v instead of 1.50v, use r = 10k w * [(1.55/1.50) C 1] = 333 w . using the fan5061 for vnorthbridge = 1.8v similarly, the fan5061 can also be used to generate vnorth- bridge = 1.8v by utilizing the agp regulator as shown in figure 6: tie the typedet pin to ground, and use r = 2k w . pcb layout guidelines placement of the mosfets relative to the fan5061 is critical. place the mosfets such that the trace length of the hidrv and lodrv pins of the fan5061 to the fet gates is minimized. a long lead length on these pins will cause high amounts of ringing due to the inductance of the trace and the gate capacitance of the fet. this noise radiates throughout the board, and, because it is switching at such a high voltage and frequency, it is very diftcult to suppress. in general, all of the noisy switching lines should be kept away from the quiet analog section of the fan5061. that is, traces that connect to pins 1, 2, 19, and 20 (hidrv, sw, lodrv and vccp) should be kept far away from the traces that connect to pins 3, 16 and 17. place the 0.1f decoupling capacitors as close to the fan5061 pins as possible. extra lead length on these reduces their ability to suppress noise. each vcc and gnd pin should have its own via to the appropriate plane. this helps provide isolation between pins. place the mosfets, inductor, and schottky as close together as possible for the same reasons as in the trst bullet above. place the input bulk capacitors as close to the drains of the high side mosfets as possible. in addition, placement of a 0.1f decoupling cap right on the drain of each high side mosfet helps to suppress some of the high frequency switching noise on the input of the dc-dc converter. place the output bulk capacitors as close to the cpu as possible to optimize their ability to supply instantaneous current to the load in the event of a current transient. additional space between the output capacitors and the cpu will allow the parasitic resistance of the board traces to degrade the dc-dc converter?s performance under severe load transient conditions, causing higher voltage deviation. for more detailed information regarding capacitor placement, refer to application bulletin ab-5. a pc board layout checklist is available from fairchild applications. ask for application bulletin ab-11. pc motherboard sample layout and gerber file a reference design for motherboard implementation of the fan5061 along with the pcad layout gerber ?le and silk screen can be obtained from our marketing department at 650-962-7833. vfb vgate vout 10k r r 10k *1 v out v nom =
fan5061 16 preliminary speci?cation fan5061 evaluation board fairchild provides an evaluation board to verify the system level performance of the fan5061. it serves as a guide to performance expectations when using the supplied external components and pcb layout. please call the marketing department at 650-962-7833 for an evaluation board. additional information for additional information contact fairchild semiconductors analog & mixed signal products group marketing department at 650-962-7833. appendix worst-case formulae for the calculation of cout, r5, and cin (circuit of figure 1 only) the following formulae design the fan5061 for worst-case operation, including initial tolerance and temperature depen- dence of all of the ic parameters (initial setpoint, reference tolerance and tempco, active droop tolerance, current sensor gain), the initial tolerance and temperature dependence of the mosfet, and the esr of the capacitors. the following information must be provided: v t+ , the value of the positive transient voltage limit; |v t- |, the absolute value of the negative transient voltage limit; i o , the maximum output current; v nom , the nominal output voltage; v in , the input voltage (typically 5v); esr, the esr of the ouput caps, per cap (44m w for the sanyo parts shown in this datsheet); r d , the on-resistance of the mosfet (20m w for the fdb6030); d r d , the tolerance of the current sensor (usually about 67% for mosfet sensing, including temperature). i rms , the rms current rating of the input caps (2a for the sanyo parts shown in this datasheet.) number of capacitors needed fo c out = the greater of: example: suppose that the transient limits are 134mv, cur- rent i is 14.2a, and the nominal voltage is 2.000v, using mosfet current sensing and the usual caps. we have v t+ = |v t- | = 0.134, i o = 14.2, v nom = 2.000, and d r d = 0.67. we calculate: since x > y, we choose x, and round up to ?nd we need 5 capacitors for c out . 2 i rms v in v nom v in v nom * io c in = 50 * 10 -6 i o * r d * (1 + d r d ) * 1.10 r5 = v t- esr * i o esr * i o x= 18 * r5 * 1.1 14400 * i o * r d y or v t+ ?.004 * v nom + = 2 5 2.000 5 2.000 * 14.2 c in 2 3.47 t 4 caps = = = = 10.4k 50 * 10 -6 14.2 * 0.020 * (1 + 0.67) * 1.0 r5 4.28 18 * 10400 * 1.1 14400 * 14.2 * 0.020 0.134 ?0.004 * 2.000 0.044 * 14.2 y = + = 4.66 0.134 0.044 * 14.2 x = =
fan5061 17 preliminary speci?cation mechanical dimension 20-lead soic a .093 .104 2.35 2.65 symbol inches min. max. min. max. millimeters notes a1 .004 .012 0.10 0.30 .020 0.51 b .013 0.33 c .009 .013 0.23 0.32 e .291 .299 7.40 7.60 e .394 .419 10.00 10.65 .010 .029 0.25 0.75 h .050 bsc 1.27 bsc h l .016 .050 0.40 1.27 0 8 0 8 3 6 5 2 2 n20 20 a ccc .004 0.10 ?? d .496 .512 12.60 13.00 notes: 1. 2. 3. 4. 5. 6. dimensioning and tolerancing per ansi y14.5m-1982. "d" and "e" do not include mold flash. mold flash or protrusions shall not exceed .010 inch (0.25mm). "l" is the length of terminal for soldering to a substrate. terminal numbers are shown for reference only. "c" dimension does not include solder finish thickness. symbol "n" is the maximum number of terminals. 20 1 d a a1 e c e ccc c lead coplanarity seating plane e b l h x 45 ? c a 11 10 eh
fan5061 preliminary speci?cation 8/11/99 0.0m 009 stock#ds30005057 1998 fairchild semiconductor corporation disclaimer fairchild semiconductor reserves the right to make changes without further notice to any products herein to improve reliability, function or design. fairchild does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights, nor the rights of others. life support policy fairchilds products are not authorized for use as critical components in life support devices or systems without the express written approval of the president of fairchild semiconductor corporation. as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, or (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user. 2. a critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com ordering information product number package fan5061m 20 pin soic
preliminary specification describes products that are not in full production at the time of printing. specifications are based on design goals and limited characterization. they may change without notice. contact fairchild semiconductor for current information. preliminary speci?ation www.fairchildsemi.com smbus is a trademark of intel corporation rev. 0.8.2 features chemistry independent charging smbus a 2-wire serial interface controlled independent voltage, current and power dacs 6a maximum charging current 4e19v battery voltage range 24v maximum input voltage 5v keep alive regulator controller onboard 100% maximum duty-cycle synchronous rectitcation system soft start protects during hot plug-ins latched current limit protection output over-voltage protection (crowbar) input under-voltage lockout battery backfeed prevented optimized response for each control loop (current, voltage and power) power down driven by smbus or by adapter not available or by softstart pin controlled drive of discrete fets minimizes power dissipation logic signal acav indicates presence of ac adapter (adjustable threshold) output current motorboating prevented true power multiplier applications notebooks? fast chargers pdas hand-held portable instruments description the fan5201 is a smart battery charger ic controller for li+ and ni based battery chemistries. the charger (slave) together with the host controller and smart battery constitutes a smart battery system that communicates via the smbus protocol, a two wire serial communication system. an innovative power control loop allows operation from line power and battery charging (with residual power) without exceeding the maximum input power programmed according to the ac adapter power rating. the fan5201 is available in one ssop24 package. block diagram dcin ssin/ilim psin+ psin- iniso hidrv lodrv drv ifb bat vfb psin am5v dig5v vth acav compp compv compi ss pgnd sgn d ithiniso ithilim - + i_dac p_dac 23 22 sda scl smbus x vtriang 14 15 16 17 18 13 11 9 2 43 10 8 7 19 12 24 1 21 5 6 20 + - - + v_dac + - + - fan5201 chemistry independent intelligent battery charger
fan5201 2 preliminary speci?ation smbus functional description figure 1. internal smbus configuration pin assignments smbus scl sda 24 1 oscillator reset (por) voltage_notreg current_notreg voltage_or current_or power_fail zero current detect to control signals to dacs: voltage current power 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 fan5201 sda scl drv sgnd dig5v am5v psin vfb bat ifb lodrv pgnd s s compi compv compp acav vth iniso ssin/ilim psin- psin+ dcin hidrv
fan5201 3 preliminary speci?ation pin descriptions pin number pin name pin function description 1sda serial data . smbus data i/o. 2 ifb current feedback. output current sense +. connect this pin to the positive side of a battery current sense resistor. 3 vfb voltage feedback. voltage remote sense feedback. connect this pin to the battery terminals. 4bat battery. output current sense -. connect this pin to the negative side of a battery current sense resistor. 5 compi current compensation. frequency compensation for current loop. 6 compv voltage compensation. frequency compensation for voltage loop. 7 dig5v 5v digital input. 5v internal power. 8 am5v 5v analog input. connect to 5v power. see figure 4. 9drv drive. base (gate) drive for external pnp (p-channel mosfet). 10 psin power supply. power source node, powered either by the ac adapter or by the battery. 11 lodrv low side fet driver. drive for low side switching mosfet q4. 12 pgnd power ground. 13 hidrv high side fet driver. drive for high side switching mosfet q3. 14 dcin dc power input. connect to the ac adapter input. 15 ssin/ilim soft start and current limit. connect to an external mosfet for limiting inrush and fault current. 16 psin+ input power sense +. connect this pin to the positive side of an adapter current sense resistor. 17 psin- input power sense -. connect this pin to the negative side of an adapter current sense resistor. 18 iniso input isolation drive. q2 gate drive. attach to a p-channel mosfet to prevent battery backfeed. 19 sgnd signal ground. attach all small signal grounds to this pin, and attach the pin to the ground plane with a single connection. 20 compp power compensation. frequency compensation for power loop. 21 ss soft start. connect to a capacitor to softstart. 22 vth voltage threshold. sets the level at which acav trips. 23 acav ac available. open collector output signaling that the ac adapter is present. 24 scl serial clock. smbus clock input.
fan5201 4 preliminary speci?ation absolute maximum ratings 1 note: 1. functional operation under any of these conditions is not implied. performance and reliability are guaranteed only if operati ng conditions are not exceeded. parameter conditions min. typ. max. unit dcin 30 v psin+, psin- 30 v ambient temperature, t a 070c maximum power dissipation ssop24, t j = 125? tbd w operating conditions dcin = 19v, t a = 0-70?, unless otherwise speci?d. parameter conditions min. typ. max. unit supply and reference dcin input supply voltage internal 5v 8 24 v external 5v 6 24 v dcin quiescent current operation 3 ma power down, note 1 200 ? psin current operation 300 power down, note 1 140 200 ? 5v accuracy i < 10ma -4 4 % drv output sink current 1 ma switching regulator v bat,min i out = 32ma 4 v maximum duty cycle 100 % oscillator frequency 225 250 275 khz hidrv on resistance high 4 7 w low 4 7 w hidrv high output, v dcin ?v hi i = 10? 100 mv hidrv low output, v dcin ?v lo i = 10? 5 v lodrv on resistance high 4 7 w low 4 7 w lodrv high output i = 10?, am5v = dig5v = %5v 4.5 v lodrv low output 100 mv analog functions input current limit threshold 108 132 mv input uvlo 5.4 6.6 v input uvlo hysteresis 400 mv vtriang amplitude, pk-pk 950 mv vtriang mean 2.5 v vtriang gain from dcin 50 mv/v psense amplifier cmrr 60 db psense amplifier cmrr @ 250khz 32 db vfb leakage operation 30 ? power down, note 1 1
fan5201 5 preliminary speci?ation bat, ifb leakage operation tbd ? power down, note 1 10 a output overvoltage threshold 107 110 113 %vout vthreshold acav rt1 = 9k w , rt2 = 1k w 5.4 6.6 v vhysteresis acav rt1 = 9k w , rt2 = 1k w 400 mv battery power_fail threshold 5.4 6.6 v current_notreg 90 110 %ireg voltage_notreg 90 110 %vreg input isolation current threshold ith = vth/rs1 3.6 mv backfeed current threshold ith = vth/rs2 3.6 mv zero current detect threshold 9.7 mv voltage_or threshold 110 %vout current_or threshold 110 112 mv ac_present threshold 5.4 6.6 v ac_present hysteresis 400 mv soft start current 2 a soft start disable output disabled 800 mv over-temperature shutdown 150 ? digital functions current dac resolution 8 bits current dac accuracy -5 +5 %fs current dac differential nonlinearity -1/2 +1/2 lsb current dac integral nonlinearity -2 +2 lsb current dac conversion time 2 msec current dac voltage offset 0 mv voltage dac resolution 8 bits voltage dac accuracy -5 +5 %vout voltage dac differential nonlinearity -1/2 +1/2 lsb voltage dac integral nonlinearity -2 +2 lsb voltage dac conversion time 2 msec power dac resolution 4 bits power dac accuracy -5 +5 %fs power dac differential nonlinearity -1/2 +1/2 lsb power dac integral nonlinearity -2 +2 lsb power dac conversion time 2 msec switches q1, q2 ssin/ilim source current, pk 10 ma ssin/ilim sink current, pk 35 65 ? ssin/ilim high output, v dcin ?v hi 100 mv ssin/ilim low output, v dcin ?v lo v dcin = 19v 10 12 v v dcin = 10v 8 v iniso on sink current 50 ? operating conditions (continued) dcin = 19v, t a = 0-70?, unless otherwise speci?d. parameter conditions min. typ. max. unit
fan5201 6 preliminary speci?ation notes: 1. 5v drv current = 0, smbus off. 2. a device will timeout when any clock low exceeds this value. 3. t high max provides a simple guaranteed method for devices to detect bus idle conditions. 4. t low:sext is the cumulative time a slave device is allowed to extend the clock cycles in one message from the initial start to the stop. if a slave device exceeds this time, it is expected to release both its clock and data times and reset itself. iniso high output, v dcin ?v hi 100 mv iniso low output, v dcin ? lo v dcin = 19v 10 12 v v dcin = 10v 8 v smbus data/clock input low voltage, v il -0.3 0.6 v data/clock input high voltage, v ih 1.4 5.5 v data/clock output low voltage, v ol at i pullup min 0.4 v data/clock hysteresis, v hys 200 mv input leakage, i leak -1 1 a current through pullup resistor or current source, i pullup 100 350 ? smb operating frequency, f smb 10 100 khz bus free time between stop and start condition, t buf 4.7 ?ec hold time after (repeated) start condition, t hd:sta after this period, the first clock is generated 4.0 ?ec repeated start condition setup time, t su:sta 4.7 ?ec stop condition setup time, t su:sto 4.0 ?ec data hold time, t hd:dat 300 nsec data setup time, t su:dat 250 nsec t timeout note 2 25 35 msec clock low period, t low 4.7 ?ec clock high period, t high note 3 4.0 50 ?ec cumulative clock low extend time, t low:sext note 4 25 msec clock/data fall time, t f 300 nsec clock/data rise time, t r 1000 nsec operating conditions (continued) dcin = 19v, t a = 0-70?, unless otherwise speci?d. parameter conditions min. typ. max. unit
fan5201 7 preliminary speci?ation applications discussion overview the fan5201 contains three control loops: a voltage-regula- tion loop, a current-regulation loop and a power-regulation loop. all three loops operate independently of each other. they are orred internally to optimize the battery charging while the notebook is drawing power in its normal operation. the voltage-regulation loop monitors the battery to ensure that its voltage is held at the voltage set point (v0). the cur- rent-regulation loop monitors current delivered to the battery to ensure that it regulates at the current-limit set point (i0). the power-regulation loop monitors total input power, to both the battery and the notebook, to ensure that total power drawn from the charger never exceeds the maximum power set point (p0). assuming that there is adequate power avail- able from the charger, the current-regulation loop is in con- trol as long as the battery voltage is below v0. when the battery voltage reaches v0, the current loop no longer regu- lates, and the voltage-regulation loop takes over. if on the other hand there is not adequate power available from the charger, the power-regulation loop is in control, and limits the charging of the battery in order to guarantee enough power for the notebook. figure 2 shows the v-i-p characteristic at the battery. setting v0, i0 and p0 the fan5201s voltage-, current-, and power-limits can be set via the intel system management bus (smbus) 2-wire serial interface. the fan5201s logic interprets the serial- data stream from the smbus interface to set internal digital- to-analog converters (dacs) appropriately. see the fan5201 logic section and smbus interface speci?ation for more information. analog section the fan5201analog section consists of 1) three transcon- ductance error ampli?rs, one for regulating current, one for regulating voltage, and one for regulating system power, 2) a pwm controller, with its associated gate drivers, and 3) miscellaneous control and reference functions, consisting of an ac present signal, 5v reference, inrush current limiter, reverse feed protection, and a soft start circuit. the fan5201 uses dacs to set the current, voltage and power levels, which are controlled via the smbus interface. since separate ampli?rs are used for each of these controls, each of the control loops can be compensated separately for optimum stability and response in each state. whether the fan5201 is controlling the voltage, current or power at any time depends on the batterys state. if there is adequate power available from the charger, and if the battery has been discharged, the fan5201s output reaches the cur- rent-regulation limit before the voltage limit, causing the sys- tem to regulate current. as the battery charges, the voltage rises until the voltage limit is reached, and the charger switches to regulating voltage. on the other hand, if there is not enough po wer available for both the notebook and the bat- tery charging, the fan5201 regulates charging current at such a level as to respect the maximum power limit. when the voltage limit is reached, the charger will similarly switch to regulating voltage. the transitions from current to voltage regulation, or from power to voltage regulation, are done by the charger, and need not be controlled by the host. figure 2. v-i-p characteristic of fan5201. if power is available, the battery is charged at a rate i0 until it reaches v0. as power becomes limiting, the charge current is reduced. battery v o i o voltage average current through the resistor between ifb andbat vo = voltage setpoint io = current setpoint po = power setpoint po limited
fan5201 8 preliminary speci?ation voltage control loop the internal transconductance voltage ampli?r controls the fan5201s output voltage. the battery voltage is fed to the non-inverting input of the ampli?r from the vfb pin. the voltage at the ampli?rs inverting input is set by an 8-bit dac, which is controlled by a chargingvoltage( ) command on the smbus (see the fan5201 logic section and smbus inter- face speci?ation for more information). the output of the ampli?r drives an inv erting ?rring?transistor; the orring provides control of the pwm to the lowest of the three ampli- ?rs, while the inversion provides the negative feedback needed for proper control. the chargingvoltage( ) command of the smbus provides a 10.000v offset, and 32mv steps, so that the charging voltage can be anywhere from 10.000v to 10.000v + 255 * 32mv = 18.16v. because a lithium-ion (li+) batterys typical per-cell voltage is 4.2v maximum, this charger is best suited for 3- and 4-cell batteries. it can also be used for several different cell counts with nimh batteries. the voltage ampli?rs output is connected to the compv pin, which compensates the voltage-regulation loop. typically, a series-resistor/capacitor combination is used to form a pole- zero pair. the pole introduced rolls off the gain starting at low frequencies. the zero provides ac gain at mid-frequencies. the output capacitor of the switcher then rolls off the mid- frequency gain to below 1 to guarantee stability, before encountering the zero introduced by the output capacitors esr. further information on loop stabilization is available in applications bulletin ab-18. current control loop the internal transconductance current ampli?r controls the battery current while the charger is regulating current. battery current is sensed by monitoring the voltage across a sense resistor (pins ifb and bat) with an ampli?r that removes the common mode battery voltage. the battery current is fed to the non-inverting input of the ampli?r. the voltage at the ampli?rs inverting input is set by an 8-bit dac, which is controlled by a chargingcurrent( ) command on the smbus (see the fan5201 logic section and smbus interface spec- i?ation for more information). the output of the ampli?r drives an inverting ?rring?transistor; the orring provides control of the pwm to the lowest of the three ampli?rs, while the inversion provides the negative feedback needed for proper control. the chargingcurrent( ) command of the smbus provides 32ma steps with an 18m w sense resistor, so that the charging current can be anywhere from 0.000a to 255 * 32ma = 8.16a. the current ampli?rs output is connected to the compi pin, which compensates the current-regulation loop. typically, a series-resistor/capacitor combination is used to form a pole- zero pair. the pole introduced rolls off the gain starting at low frequencies. the zero provides ac gain at mid-frequencies. the output capacitor of the switcher then rolls off the mid- frequency gain to below 1 to guarantee stability, before encountering the zero introduced by the output capacitors esr. further information on loop stabilization is available in applications bulletin ab-18. power control loop the internal transconductance power ampli?r controls the systems total power consumption (notebook plus battery charging). input voltage is monitored on pin dcin, and input current is sensed by monitoring the voltage across a sense resistor (pins psin+ and psin-) with an ampli?r that removes the common mode input voltage. these two signals are then multiplied together with an analog multiplier, and the result is fed to the non-inverting input of the ampli?r. the voltage at the ampli?rs inverting input is set by a 4-bit dac, which is controlled by a chargingpower( ) command on the smbus (see the fan5201 logic section and smbus interface speci?ation for more information). the output of the ampli?r drives an inverting ?rring?transistor; the orring provides control of the pwm to the lowest of the three ampli?rs, while the inversion provides the negative feedback needed for proper control. the chargingpower( ) command of the smbus provides a 25w offset, and 5w steps, so that the total power drawn can be anywhere from 25w to 25w + 15 * 5w = 100w. the power ampli?rs output is connected to the compp pin, which compensates the power-regulation loop. typically, a series-resistor/capacitor combination is used to form a pole- zero pair. the pole introduced rolls off the gain starting at low frequencies. the zero provides ac gain at mid-frequencies. the output capacitor of the switcher then rolls off the mid- frequency gain to below 1 to guarantee stability, before encountering the zero introduced by the output capacitors esr. further information on loop stabilization is available in applications bulletin ab-18. a sudden surge in power required by the notebook will result in a momentary overload on the ac adapter. this has no ill effects, because the power loop recovery time is much shorter than the adapter's thermal time constant, and the minimum adapter output voltage equals the battery voltage, which is suf?ient to run the notebook. pwm controller the battery voltage or current or input power is controlled by the pulse-width-modulated (pwm) dc-dc converter control- ler. this controller drives two external mosfets, an n- and a p-channel, which switch the voltage from the input source. this switched voltage feeds an inductor, which ?ters the switched rectangular wave. the controller sets the pulse width of the switched voltage so that it supplies the desired voltage or current to the battery. the heart of the pwm controller is its multi-input comparator. this comparator compares the lowest of three input signals with a ramp, to determine the pulse width of the switched signal, setting the battery voltage or current. the three signals being orred together are the current-sense ampli?rs output, the voltage-error ampli?rs output, and the power-error ampli?rs output.
fan5201 9 preliminary speci?ation when the current-sense ampli?r is in control of the pwm, the comparator adjusts the duty cycle of the switches, regu- lating the average battery current and keeping it proportional to the error voltage. the current is averaged, rather than peak, since the current sense resistor is between the output capacitor and the battery. since the average battery current is nearly the same as the peak current, the controller acts as a transconductance ampli?r, reducing the effect of the inductor on the output ?ter lc formed by the output inductor and the output capacitance. this makes stabilizing the circuit easy, since the output ?ter changes from a complex second-order rlc to a ?st-order rc. to preserve the inner current-control loops stability, slope compensation is also fed into the com- parator. this damps out perturbations in the pulse width at duty ratios greater than 50%. at heavy loads, the pwm con- troller switches at a ?ed frequency and modulates the duty cycle to control the battery current. at light loads, the dc current through the inductor is not suf?ient to prevent the current from going negative through the synchronous recti?r (figure 2, q4). the controller monitors the current through the sense resistor; when it drops to below 200ma, the syn- chronous recti?r turns off to prevent negative current ?w. when the voltage error ampli?r is in control of the pwm, the comparator adjusts the duty cycle of the switches, regu- lating the battery voltage and keeping it proportional to the error voltage. in this mode, the control loop is a standard voltage-mode control, and the only requirement to guarantee stability is that the loop gain be rolled off below 0db before the lc resonant frequency. when the power error ampli?r is in control of the pwm, the comparator adjusts the duty cycle of the switches, regu- lating the total power drawn from the charger. the loop determines whether the total power available from the wall adapter is suf?ient to provide both the load and battery charging needs. if not, the charging power to the battery is reduced by the amount needed to keep the total demand within the ac-dc output power limit of the adapter. the pwm controller also implements voltage feedforward. this means that the gain of the control loops are adjusted inversely proportionally to the input voltage: as the input voltage increases, loop gain is decreased. this improves the audio susceptibility of the converter, and in particular, means that the bandwidth of each of the loops is relatively indepen- dent of the ac adapter voltage. feedforward is accomplished by modulating the amplitude of the ramp signal. mosfet drivers the fan5201 drives external mosfets to regulate battery voltage or current, a high-side p-channel and a low-side n-channel for synchronous recti?ation. use of a p-channel mosfet for the high-side switch permits operation without charge-pumping and its attendant external components. the synchronous recti?r behaves like a diode, but with a smaller voltage drop to improve ef?iency. a small dead time is added between the time that the high-side mosfet turns off and the synchronous recti?r turns on, and vice versa. this prevents shootthrough currents (currents that ?w through both mosfets during the brief time that one is turning on and the other is turning off). a schottky recti?r from the source to the drain of q4 prevents the synchronous recti?rs body diode from conducting. the body diode typically has slower switching-recovery times, so allowing it to conduct would degrade ef?iency. control and reference functions the fan5201 has a number of additional analog functions to enhance overall system performance. the acav is an open collector signal that can be used to determine the pres- ence of the ac charger; its threshold is set by an external resistor divider attached the vth pin. a 5v keep alive linear regulator receives power either from the ac adapter via q1 or from the battery (psin pin). this regulator can provide up to 10ma to power memory during a system shutdown. protection circuitry the fan5201 protects against a variety of possible fault or problem conditions. input protection inrush current can be a problem during hot plug-in if in front of the switching regulator a large capacitor is used to decouple noise. conceivably, the inrush could be high enough to trip on overcurrent protection in the ac adapter. the fan5201 provides the means for limiting inrush current to any desired value: the ssin/ilim pin provides a sink current of 65? maximum to turn on the gate of the p-channel mosfet q1, so that selecting a gate-source capacitance on q1 will slow its turn-on time to any desired speed, thus restricting the amount of inrush current. the charger has its own local soft start, which controls the maximum duty cycle of the pwm. the softstart time is set by selecting a capacitor attached to the ss pin. the softstart pin can also be used for a hard shutdown, by pulling it to ground. while the ac adapter is not present, the fan5201 shuts itself off, using an uvlo set at 6.0v. if the ac adapter is connected to the fan5201 circuit but is not plugged in, the adapter could present a load to the bat- tery. the fan5201 prevents this by turning off q2 (attached to the iniso pin) if the input current falls below 200ma (with an 18m w sense resistor). however, this function is dis- abled until the softstart pin reaches steady state. output protection if input current exceeds the design of the fan5201 (6a with an 18m w sense resistor) the ic latches off q1, disconnecting the circuitry from input power within a few microseconds.
fan5201 10 preliminary speci?ation if one ac adapter is connected when the battery is not present, the overcurrent limit does not disable the converter because q1 acts as an inrush current limit. if the battery voltage exceeds certain levels, internal protection in the battery may open. to prevent this, the fan5201 latches off q1, q3 and q4 if the output voltage exceeds approximately 110% of the setpoint. the power converter is a synchronous buck for ef?iency. this topology is actually two-quadrant, and could potentially draw current from the battery, boosting it high enough to override the ac adapter. to prevent this backfeed, the fan5201 turns off the synchronous recti?r if the current into the battery drops below 200ma (with an 18m w sense resis- tor), utilizing instead the paralleled schottky. if the internal overvoltage switch in the battery were to open due to a high charge current producing a high voltage (due to battery esr), the voltage loop would take over. with the voltage loop in control, the battery switch would close, and the current could surge high until the current control loop comes out of saturation. the fan5201 prevents this type of oscillation by means of a special loop controlling the error ampli?r of the current loop. battery conditioning with switch b1 off (see figure 5), the notebook load can be applied to the batteries even in the presence of the dc adapter. this permits deep discharge of the batteries as part of the battery conditioning process. battery present the presence of the battery can be detected by the host microcontroller. logic section the fan5201 uses serial data to control its operation. the serial interface is compliant with the smbus speci?ation (see ?ystem management bus speci?ation? rev. 1.08). charger functionality is compatible with an extended subset of the intel/duracell smart charger speci?ation for a level 2 charger. the fan5201 uses the smbus read-word, write- word, and block-read protocols to communicate with the host system that monitors the battery. the fan5201 never ini- tiates communication on the bus; it only receives commands and responds to queries for status information. figure 9 shows examples of the smbus write-word and read-word protocols. each communication with the fan5201 begins with a start condition that is de?ed as a falling edge on sda with scl high. the device address follows the start condi- tion. the fan5201 device address is 0001001b (b indicates a binary number). note that the address is only seven bits, and the binary representation uses r/w as its least signi?ant bit. programming a ? interface for the fan5201 the ? programmer must bear in mind that the fan5201 operates as a slave device to the host ?; all communications to the battery are via the host. thus, in particular, the charg- ingcurrent(), chargingvoltage(), and alarmwarning() com- mands (and thermistor signals for ni based batteries) must all be passed to the ?. there is no way to send them directly to the charger. another important aspect for the programmer to be aware of is that at power-up, all of the internal registers of the fan5201 are zeroed. thus, in order to have the fan5201 turn on, it is necessary to write to all of the dacs. it is also recommended to write to the control signals word before writing to the dacs. with these suggestions in mind, a possible ?wchart for the ? interface to the fan5201 would be as shown in figure 3. in the ?st step, the battery charge requests are read; after this the fan5201 can be programmed. first, the fan5201 is left in power down until the programming has been success- ful. next, charging power, current, and voltage are set; the fan5201 will not operate until all three have been written. the ? next checks that all of the data has been correctly written; if not, the programming sequence is retried. finally, the power down signal is turned off. application schematics and boms figure 4 shows the fan5201 in a single battery pack system. figure 5 shows the fan5201 in a two battery pack system. in a two battery system, the host microcontroller must poll to determine the state of each battery; and then a selector must control the switches. figure 4 shows a typical smart battery system: for ni based chemistries the temperature informa- tion is handled directly by the ?. the ? continuously monitors the smbus; in case of communications breakdown the ? detects this and takes appropriate action. for a nimh battery, a hardware overtemperature protection can be imple- mented using a comparator on the thermistor line, and turn- ing the softstart pin off. notice that q1 through q4 are drawn with the associated intrinsic diode in figure 4 and figure 5.
fan5201 11 preliminary speci?ation figure 3. suggested flowchart for fan5201 startup write charging power( ) to fan5201 y n write charging current( ) to fan5201 write charging voltage( ) to fan5201 read charge settings( ) from fan5201 read battery chargingcurrent( ) and chargingvoltage( ) charger settings correct? write 0x02 to the control signals register
fan5201 12 preliminary speci?ation figure 4. single battery pack system table 1. bill of materials for single battery pack system (8a maximum current) reference manufacturer manufacturers p/n quantity description c v , c i , c ilim 3 100nf 20% 50v ceramic chip cap c 1 ,c r avx tpsv107*020r0085 2 100? 20v 85m w tantalum chip cap c ss 1 10nf 20% 50v ceramic chip cap c2? 2 10?, 10v tantalum chip cap r v 1 10k w 1% 1/10w rt1 1 9.09k w 1% 1/10w rt2, r i 11k w 1% 1/10w rs1-2 dale wsl-2512-r018 2 18m w 1w sm r1 1 100k w 1/10w c p 1 970nf ceramic chip cap r p , r2 2 10 w 1/10w l1 dale ihsm-7832-5.6 m h 1 5.6? 6a 25m w sm inductor q1-2 fairchild nds8435a 2 30v 23m w so8 p-channel q3 fairchild fds9435a 1 30v 50m w so8 p-channel q4 fairchild fds6612a 1 30v 10m w so8 n-channel q5 fzt704ct 1 100v 2a sot223 pnp darlington d1-3 motorola mbrd835l 3 35v 8a schottky u1 fairchild fan5201 1 ssop24 controller 14 15 16 17 18 19 13 21 20 22 acav 23 11 10 98 r 2 7 6 u1 fan5201 12 4 532 24 1 scl sda +5v rt2 rt1 c in q1 c ilim rs1 c r q2 q3 q4 d2 l1 c 1 d1 rs 2 d3 q5 c i +5v to notebook from ac adapter r1 c 2 c i c 3 r i r v c p r p c ss
fan5201 13 preliminary speci?ation figure 5. two battery pack system figure 6. typical smart battery system c in q1 c ilim rs1 c r q2 q3 q4 d2 l1 c 1 b1 b3 b2 b4 rs 2 b5 b6 q5 +5v to notebook from ac adapter r1 c 2 b7 14 15 16 17 18 19 13 21 20 22 acav 23 11 10 987 6 12 4 532 24 1 scl sda +5v rt2 rt1 c i c v c 3 r i r v c p r p c ss u1 fan5201 r 2 smart battery fan5201 c sm bus sm b us power & gnd ac adapter
fan5201 14 preliminary speci?ation smbus interface speci?ation the fan5201 is designed to ? in a system whose center is a microcontroller acting as an smbus host. the host receives charging requests and other signals from a smart battery, and sends charging requests to the fan5201 charger, in the process providing the necessary translations. the fan5201 acts as a slave only. there is no direct communication between the charger and the battery. note that the fan5201 is not intended to be fully compliant with the intel/dura- cell smart battery system speci?ation. this document speci?s all of the fan5201s smbus interface. slave address 0001001b power on the fan5201 powers on with all dacs set to zero. all dacs must be written to before charging can begin. at power on, the zero current bit is 0. supported communications?rite section (? to ic) charging current the host sends the desired charging rate in ma. smbus protocol: write word command code: 0x14 figure 7. charging current input and output word for example, 0x0200 sets a charge current of 512ma by out- putting (16/255) * fs, where fs = 8160ma. charging voltage the host sends the desired charging voltage in mv with an offset of 10v. smbus protocol: write word command code: 0x15 figure 8. charging voltage input and output word for example, 0x0200 sets a charging voltage of 10.512v by outputting (16/255) * fs +10v, where fs = 8.160v. charging power the host sends the maximum power available from the ac adapter in 5w increments with an offset of 25w. smbus protocol: write word command code: 0x17 figure 9. charging power input and output word for example, 0x0005 sets maximum charge power at 50w by outputting (5/15) * fs +25w, where fs = 75w. control signals the host sends a signal to set the ic into power down mode, and to reset the zero current ?g. when power down is sent to the ic, only the 5v linear regu- lator and the smbus are on, all other systems are turned off. table 2. charging current input and output input unsigned 2-byte desired charging current units ma lsb bit 5 msb bit 12 output scale 255 steps (from 0 to full-scale) resolution 32ma (with 18m w sense resistor) xx x xx xx x msb lsb 15 14 13 21 43 0 87 10 11 9 6 12 5 table 3. charging voltage input and output input unsigned 2-byte desired charging voltage units mv lsb bit 5 msb bit 12 output scale 255 steps (from 0 to full-scale) resolution 32mv table 4. charging power input and output input unsigned 2-byte maximum charging power units 5w lsb bit 0 msb bit 3 output scale 15 steps (from 0 to full-scale) resolution 5w (with 18m w sense resistor) xx x xx xx x msb lsb 15 14 13 21 43 0 87 10 11 9 6 12 5 xx x x xx x x x x x x msb lsb 15 14 13 21 43 0 87 10 11 9 6 12 5
fan5201 15 preliminary speci?ation the smbus continues to latch incoming information in power down. zero current reset true (=1) resets the zero_current bit (in the charger status word) to 0 = valid. in order for the zero_current bit to function again, the zero current reset bit must be set false (= 0) after this, otherwise the zero_current bit will remain in the valid state regard- less of battery current. smbus protocol: write word command code: 0x18 figure 10. control signals word for example, 0x0006 sets the ic in normal operation, and the zero current bit is reset. supported communications?ead section (? to ic) charger status the host uses this command to read the chargers status bits. voltage_notreg is set if the battery voltage is outside +10% of the programmed charging voltage. current_notreg is set if the battery current is outside +10% of the programmed charging current. zero_current is zero if the battery current is less than 200ma (with an 18m w sense resistor). current_or is zero if the battery current is >6a. voltage_or is zero if the battery voltage is >110% of the programmed charging voltage. power_fail is set if the battery voltage is <8.5v. smbus protocol: read word command code: 0x13 figure 11. charger status word for example, a normal operation charger might set this word to 0x8028 to show that the ac adapter is present, power is on, voltage is being regulated, and current is above minimum. charger settings the host uses this command to read the chargers settings. smbus protocol: block read command code: 0x3f table 5. control signals field bit support power down/normal 1 0/1 zero current reset 2 1 = true xx x x xx x x x x x x x zcr pd x 15 14 13 21 43 0 87 10 11 9 6 12 5 table 6. charger status read field bit support charge_inhibited 0 always 0, charger enabled master_mode 1 always 0, slave mode voltage_notreg 2 0 = in regulation current_notreg 3 0 = in regulation level_2/3 4 not supported zero_current 5 0 = valid current_or 6 0 = valid voltage_or 7 0 = valid thermistor_or 8 not supported thermistor_cold 9 not supported thermistor_hot 10 not supported thermistor_ur 11 not supported alarm_inhibited 12 not supported power_fail 13 0 = voltage ok battery_present 14 not supported ac_present 15 always 1, charger present 1 x 0/1 0/1 0/1 0/1 0/1 0/1 0 xx x xx x 15 14 13 21 43 87 10 11 9 6 12 5
fan5201 16 preliminary speci?ation non-supported communications the following features are speci?d in the intel/duracell smart charger speci?ation, but are not directly supported by the fan5201. thermistor interface interface to the thermistor occurs exclusively through the host. typical battery communications charging current and voltage requests are intercepted by the host, which transmits them to the charger. critical battery communications overcharge and overtemperature communications are sent to the host, which transmits commands to the charger. bus errors unsupported commands, data unavailable, busy or bad data are not transmitted to the host. the fan5201 signals errors by witholding acknowledge (see protocols). it does not support any reads of error registers. alarmwarnings() alarm warnings are sent to the host, which transmits com- mands to the charger. chargermode() settings the chargermode() write command is unsupported. the commands effects may be obtained by sending the appropri- ate commands to the charger. 175 seconds timeout supported by the host, not by the ic. furthermore, it is rec- ommended that a watchdog timer be used in conjunction with the host processor, to assure that the timeout is not affected by in?ite software loops. table 7. charger settings read field byte byte count always set to 0x08 charger current low byte 1 charger current high byte 2 charger voltage low byte 3 charger voltage high byte 4 charger power low byte 5 charger power high byte 6 control signal low byte 7 control signal high byte 8 figure 12. read and write protocols s slave address slave address slave address slave address slave address wr wr a command code command code command code a data byte low data byte high data byte low data byte high p write word protocol s s rd a p read word protocol s wr a a s rd a byte count = n a data byte 1 data byte 2 data byte n a a ap block read protocol master to slave slave to master a a a a a a s = startcondition wr = write rd = read a = acknowledge a = not acknowledge p = stop condition
fan5201 17 preliminary speci?ation timing diagram figure 13. smbus timing diagram clk t low t r t f t hd:sta t hd:sta t buf t su:sta t su:sto t hd:dat t high t su:dat data
fan5201 18 preliminary speci?ation mechanical dimensions 24-lead ssop a .078 2.00 symbol inches min. max. min. max. millimeters notes a1 .002 0.05 .073 1.85 a2 .065 1.65 b .010 .015 0.22 0.38 d .311 .335 7.90 8.50 h .197 .220 5.00 5.60 .022 .037 0.55 0.95 e .026 bsc 0.65 bsc e l .291 .323 7.40 8.20 0 8 0 8 3 6 5 5 2, 4 2 n24 24 a ccc .004 0.10 ?? c .0035 .010 0.09 0.25 notes: 1. 2. 3. 4. 5. 6. dimensioning and tolerancing per ansi y14.5m-1982. "d" and "e" do not include mold flash. mold flash or protrusions shall not exceed .006 inch (0.15mm). "l" is the length of terminal for soldering to a substrate. terminal numbers are shown for reference only. "b" and "c" dimensions include solder finish thickness. symbol "n" is the maximum number of terminals. h e a a2 d e b a1 e c e ccc c lead coplanarity seating plane a l c
fan5201 preliminary speci?ation 11/5/99 0.0m 008 stock#ds30005052 1998 fairchild semiconductor corporation disclaimer fairchild semiconductor reserves the right to make changes without further notice to any products herein to improve reliability, function or design. fairchild does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights, nor the rights of others. life support policy fairchild? products are not authorized for use as critical components in life support devices or systems without the express written approval of the president of fairchild semiconductor corporation. as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, or (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user. 2. a critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com ordering information * product number package fan5201msa 24 lead ssop
trademarks acex? coolfet? crossvolt? e 2 cmos tm fact? fact quiet series? fast ? fastr? gto? hisec? the following are registered and unregistered trademarks fairchild semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks. life support policy fairchild?s products are not authorized for use as critical components in life support devices or systems without the express written approval of fairchild semiconductor corporation. as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, or (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user. 2. a critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. product status definitions definition of terms datasheet identification product status definition advance information preliminary no identification needed obsolete this datasheet contains the design specifications for product development. specifications may change in any manner without notice. this datasheet contains preliminary data, and supplementary data will be published at a later date. fairchild semiconductor reserves the right to make changes at any time without notice in order to improve design. this datasheet contains final specifications. fairchild semiconductor reserves the right to make changes at any time without notice in order to improve design. this datasheet contains specifications on a product that has been discontinued by fairchild semiconductor. the datasheet is printed for reference information only. formative or in design first production full production not in production disclaimer fairchild semiconductor reserves the right to make changes without further notice to any products herein to improve reliability, function or design. fairchild does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights, nor the rights of others. syncfet? tinylogic? uhc? vcx? isoplanar? microwire? pop? powertrench qfet? qs? quiet series? supersot?-3 supersot?-6 supersot?-8 ? rev. d
dc motor drive ic ?2000 fairchild semiconductor corporation www.fairchildsemi.com rev. 1.0.0 features ? 2-channel btl driver with current feedback 2-channel btl dc motor driver built-in thermal shutdown circuit built-in mute circuit operating supply voltage: 4.5~13.2v corresponds to 3.3v or 5v dsp description the fan8024d is a monolithic ic, suitable for a 2-ch btl dc motor driver and a 2-ch motor driver with current feed- back which drives the focus and tracking actuator of a cd- media system. 28-ssoph-375 typical applications compact disk rom compact disk rw digital video disk rom digital video disk rw other compact disk media fan8024d (ka3024d) 4-ch motor drive ic
fan8024d (ka3024d) 2 dc motor drive ic pin assignments 28 27 26 25 24 23 22 21 20 19 18 17 16 15 12 3 45 6 7 89 10 11 12 13 14 stby ref in4 cap4.1 cap4.2 in3 vccgnd pvcc2 fb4 pgnd2 do3 ? ? ? ?
fan8024d (ka3024d) 3 dc motor drive ic pin definitions pin number pin name i/o pin function description 1 in1 i ch1 input 2 cap1.1 - connection with capacitor 3 cap1.2 - for ch1 4 in2.1 i op-amp ch2 input(+) 5 in2.2 i op-amp ch2 input(-) 6 out2 o op-amp ch2 output 7 fb1 i feedback for ch1 8 vcc - signal vcc 9 pvcc1 - power supply 1 10 pgnd1 - power ground 1 11 do2 ? ? ? ?
fan8024d (ka3024d) 4 dc motor drive ic internal block diagram 28 27 26 25 24 23 22 21 20 19 18 17 16 15 12345 6 7 89 10 11 12 13 14 stby ref in4 cap4.1 cap4.2 in3 vccgnd pvcc2 fb4 pgnd2 do3 ? ? ? ?
fan8024d (ka3024d) 5 dc motor drive ic equivalent circuits error amp input stand-by input error amp output signal reference input power amp output 8k ? ? ? ? ? ? ? ? ? ?
fan8024d (ka3024d) 6 dc motor drive ic absolute maximum ratings (ta = 25 o c) notes: 1. when mounted on a 50mm recommended operating conditions (ta = 25 o c) parameter symbol value unit maximum supply voltage v ccmax 15 v power dissipation p d @1.7 w operating temperature range t opr -35 ~ +85 parameter symbol min. typ. max. unit supply voltage v cc 4.5 - 13.2 v 175 150 125 100 75 50 25 0 1,000 2,000 3,000 pd [mw] ambient temperature, ta [ soa 85
fan8024d (ka3024d) 7 dc motor drive ic electrical characteristics (unless otherwise specified, ta = 25 c, v cc = 12v, pv cc 1,2 = 5v & the other conditions & nomenclatures follow the test circuit) parameter symbol conditions min. typ. max. units quiescent current1 i cc1 stand-by off - 18 27 ma quiescent current1 i cc2 stand-by on - - 0.5 ma stand-by on voltage v ston --0.5v stand-by off voltage v stoff 2.0 - - v actuator drive part output offset current i oo1,4 vin1,4 set to bias -6 0 +6 ma maximum output voltage1 v om1,4 vin1,4 = 4.5v 3.6 4.0 - v transconductance g m1,4 vin1,4 = 100mvp-p, f=1khz 1.5 1.7 1.9 a/v pre op ? ? ? ? amp (sled driver ) ) ) ) sled drive part output offset voltage of input op-amp v of2 sw1=>posit. 2, sw2=>posit. 1 vin 2 & vin5 set to bias -100 0 +100 mv maximum output voltage2 v om2 sw1 & sw2 set to position 2 vin2 set to 4.5v 10.0 10.9 - v closed loop voltage gain1 g vlo2 vin2 = 100mvp-p, f=1khz sw2 & sw1 set to position 2 18.0 20.0 22.0 db loading drive part output offset voltage1 v of3 vin3 set to bias -50 0 50 mv maximum output voltage 3 v om3 vin3 set to 4.5v 3.6 4.0 - v closed loop voltage gain 2 g vlo3 vin3 = 100mvp-p, f=1khz 13.5 15.5 17.5 db
fan8024d (ka3024d) 8 dc motor drive ic application information 1. reference input & stand-by function reference input (pin 27) the applied voltage at the reference input pin must be between 1.4v and 6.5v, when v cc =8.5v. stand-by input (pin 28) the following input conditions must be satisfied for the normal stand-by function. 2. protection function thermal shutdown (tsd) if the chip temperature rises above 175 c, the thermal shutdown (tsd) circuit is activated and the output circuit is in the mute state, that is off state. the tsd circuit has a temperature hysteresis of 25 c 3. separation of power supply pv cc1 (pin 9) pv cc1 is the power for loading driver. the range is between 5v ~ 12v. pv cc2 (pin 21) pv cc2 is the power supply for actuator driver that include focus and tracking actuator. the range is between 5v ~ 12v v cc (pin 8) v cc pin supplies power for sled driver and signal logic part. the voltage applied to v cc must be higher than pv cc1 and pv cc2 at least 1v stand-by input voltage below 0.5v or open stand-by function is activated so the bias block and the power block are disabled stand-by input voltage above 2.0v normal operation
fan8024d (ka3024d) 9 dc motor drive ic test circuits symbol value symbol value symbol value r1 1m ? ? ? ? ? ? ? ? ? vin3 c5 c1 1 2 1 2 r2 r1 fan8024d 1 2 3 4 5 6 7 22 23 24 25 26 27 28 8 9 10 11 12 13 14 15 16 17 18 19 20 21 c2 vst r4 vcc c3 r5 vin1 bias vin4 v v vin2 v r3 12 v r6 a a pvcc1 v r9 r7 v r8 v c4 a pvcc2 12v v sw3 sw1 sw2 v vin5
fan8024d (ka3024d) 10 dc motor drive ic typical application circuits 28 27 26 25 24 23 22 21 20 19 18 17 16 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 fan8024d servo amp focus tracking sled tray sled 12v focus actuator in1 cap1.1 cap1.2 in2.1 in2.2 out2 fb1 vcc pvcc1 pgnd do2 ? ? ? ?
fan8024d (ka3024d) 11 dc motor drive ic ordering information device package operating temp. fan8024d 28-ssoph-375 -35
fan8024d (ka3024d) dc motor drive ic 12/28/99 0.0m 001 stock#dsxxxxxxxx ? life support policy fairchild?s products are not authorized for use as critical components in life support devices or systems without the express written approval of the president of fairchild semiconductor corporation. as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2. a critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com
dc motor drive ic ?2000 fairchild semiconductor corporation www.fairchildsemi.com rev. 1.0.0 features ? 3-channel btl driver 1-channel forward-reverse control dc motor driver built-in thermal shutdown circuit built-in mute circuit operating supply voltage: 4.5~13.2v corresponds to 3.3v or 5v dsp description the FAN8026D is a monolithic integrated circuit, suitable for a 1-ch (forward.reverse) control dc motor driver and a 3-ch motor driver which drives the focus actuator,tracking actuator, and sled motor of a cd system. 28-ssoph-375 typical applications compact disk player digital video disk player mini disk player FAN8026D (ka3026d) 4-ch motor drive ic
FAN8026D (ka3026d) 2 dc motor drive ic pin assignments 28 27 26 25 24 23 22 21 20 19 18 17 16 15 12 3 45 6 7 89 10 11 12 13 14 do1+ do1- pgnd2 do2+ do2- vm1,2 mute4 do3+ do3- pgnd1 vm3,4 do4+ do4- vcc in1.1 in1.2 out1 in3.1 in3.2 out3 in2 sgnd ctl fwd rev ref mute1,2 mute3 FAN8026D (gnd) (gnd) fin fin
FAN8026D (ka3026d) 3 dc motor drive ic pin definitions pin number pin name i/o pin function descrition 1 in1.1 i op-amp ch1 input (+) 2 in1.2 i op-amp ch1 input (-) 3 out1 o op-amp ch1 output 4 in3.1 i op-amp ch3 input (+) 5 in3.2 i op-amp ch3 input (-) 6 out3 o op-amp ch3 output 7 in2 i op-amp ch2 input 8 sgnd - signal ground 9 ctl i ch4 motor speed control 10 fwd i ch4 forward 11 rev i ch4 reverse 12 ref i bias voltage input 13 mute1,2 i ch1, 2 mute 14 mute3 i ch3 mute 15 v cc -signal v cc 16 do4- o drive4 output (-) 17 do4+ o drive4 output (+) 18 vm3, 4 - btl ch3, 4 power v cc 19 pgnd1 - ch3, 4 power ground 20 do3- o drive3 output (-) 21 do3+ o drive3 output (+) 22 mute4 - ch4 mute 23 vm1,2 - btl ch1, 2 power v cc 24 do2- o drive2 output (-) 25 do2+ o drive2 output (+) 26 pgnd2 - ch1,2 power ground 27 do1- o drive1 output (-) 28 do1+ o drive1 output (+)
FAN8026D (ka3026d) 4 dc motor drive ic internal block diagram vm1,2 tsd vm3, 4 msc sw + mute1,2 mute3 28 27 26 25 24 23 22 21 20 19 18 17 16 15 12345 6 7 89 10 11 12 13 14 + 10k 10k 10k 10k 20k + + + - + 10k vm3,4 do1+ do1- pgnd2 do2+ do2- vm1,2 mute4 do3+ do3- pgnd1 vm3,4 do4+ do4- vcc in1.1 in1.2 out1 in3.1 in3.2 out3 in2 sgnd ctl fwd rev ref mute1,2 mute3 level shift level shift + - - - - - - mute4 level shift 10k 10k 10k + + + vm1,2 btlvm/2 10k btlvm/2 - - - 10k 10k 10k + + + vm1,2 btlvm/2 10k btlvm/2 - - 10k 10k 10k + + + vm3,4 btlvm/2 10k btlvm/2 - - - -
FAN8026D (ka3026d) 5 dc motor drive ic equivalent circuits mute input power output ch2 level shift input signal reference input error amp input loading control input error amp output loading logic input 14 50 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
FAN8026D (ka3026d) 6 dc motor drive ic absolute maximum ratings ( ta=25 c) notes: 1. when mounted on a 50mm recommended operating conditions ( ta=25 c) parameter symbol value unit maximum supply voltage v ccmax 15 v power dissipation p d 1.7 w operating temperature range t opr -35 ~ +85 parameter symbol min. typ. max. unit supply voltage vcc 4.5 - 13.2 v 0 1,200 2,000 pd (mw) pd (temporary) 0 25 50 85 100 125 150 175 ambient temperature, ta ( soa
FAN8026D (ka3026d) 7 dc motor drive ic electrical characteristics (unless otherwise specified, ta = 25 c, v cc = vm1,2 = vm3,4 = 5v) parameter symbol conditions min. typ. max. units quiescent current i cc vin = 0v - 8 12 ma ch mute on current imute ch pin 13, pin14, pin22 = gnd - 1 3 ma ch mute on voltage vmon ch pin13, pin14, pin22 = variation - - 0.5 v ch mute off voltage vmoff ch pin13, pin14, pin22 = variation 2 - - v drive part input offset voltage vio -20 - +20 mv output offset voltage voo vin = 2.5v -40 - +40 mv maximum output voltage1 vom1 vcc=8v, rl = 8 ? ? error op amp part input offset voltage vofop -10 - +10 mv input bias current ibop - - 300 na high level output voltage vohop vcc=8v 7.2 7.6 - v low level output voltage volop vcc=8v - 0.2 0.5 v output sink current isink rl = 1k ? ? tray drive part (vcc = vm34 = 8v, rl = 45 ?) ?) ?) ?) ?
FAN8026D (ka3026d) 8 dc motor drive ic application information 1. reference input pin 12 (ref) is a reference input pin. 1) reference input the applied voltage at the reference input pin must be between 1.5 (v) and 6.5 (v), when vcc = 8v. 2. separated channel mute function these pins are used for individual channel mute operation. 1) when the mute pins (pin13,14 and 22) are low level, the mute circuits are enabled and the output circuits are muted. 2) when the voltage of the mute pins (pin13,14 and 22) are high level, the mute circuits are disabled and the output circuits operate normally. 3) if the chip temperature rises above 175 c, then the thermal shutdown (tsd) circuit is activated and the output circuits are muted. mute1, 2 (pin13) - ch1, 2 mute control input pin. mute3 (pin14) - ch3 mute control input pin. mute4 (pin22) - ch4 mute control input pin. 3. protection function thermal shutdown (tsd) 1) if the chip temperature rises above 175 c the thermal shutdown (tsd) circuit is activated and the output circuit is in the mute state, that is off state. the tsd circuit has a temperature hysteresis of 25 c. 4. focus, tracking actuator, sled motor drive part 1) the reference voltage ref is given externally through pin 12. 2) the error amp output signal is amplified by r2/r1 times and then fed to the level shift circuit. 3) the level shift circuit produces the differential output voltages and drives the two output power amplifiers. since the differential gain of the output amplifiers is equal to 2 (1+ r4/ r3), the output signal of the error amp is amplified by (r2/r1) 2 (1+r4/r3). 4) if the total gain is insufficient, the input error amp can be used to increase the gain. 5) the bias voltage (vr) is about a half of the supply voltage(vm). - + level snift vin 1 4 2 5 3 67 ea + - + - r1 r2 ap1 +- 12 vref error amp + + - - ap2 ap3 r3 r3 vr r4 r4 power amp m
FAN8026D (ka3026d) 9 dc motor drive ic 5. tray motor drive part 1) rotational direction control - the forward and reverse rotational direction is controlled by fwd (pin 10) and rev (pin 11) inputs. conditions are as follows. - vr(power reference voltage) is (vm34-vbe) / 2 2) motor speed control - the motor speed is proportional to the difference voltage between the pin17(do4+) and the pin16(do4-). - by applying the voltage to the pin9 of ctl, the motor speed can be controlled and it is linearly proportional to the applied control voltage. - when both vm3,4 and vcc are 8v, and the applied control voltage is higher than 7v, the motor speed is not proportional to the control voltage but the motor speed becomes constant. - if the pin9 is opened,the motor torque becomes maximum. - the maximum output swing is 6.0v, when vm3,4 and vcc are 8v. input output fwd rev do4+ do4- state h h vr vr brake hlhlforward lhlhreverse l l vr vr brake level shift fwd rev in in m. s. c s. w 10 11 d d 16 17 m do4- do4+ ctl 9
FAN8026D (ka3026d) 10 dc motor drive ic typical performance characteristics < v cc & i cc > v cc (v) i cc (ma) ta=25 vcc=vm12=vm34 < v cc & v om > v cc (v) v om (v) ta=25 vcc=vm12=vm34 rl1=8ohm (ch1,2) rl2=24ohm(ch3) < i om & vout >
i om (a) v out (v) ch1 upp. ch1 low ch2 upp. ch2 low ch3 upp. ch3 low ta=25 vcc=vm12=vm34 < v cc & g vc >

v cc (v) g vc (db) ch1 ch2 ch3 ta=25 vcc=vm12=vm34 rl1=8ohm (ch1,2) rl2=24ohm(ch3) < v cc & i source (error amp) > v cc (v) i source (ma) ch1 ch2 ta=25 rl=1kohm < v cc & i sink (error amp) > v cc (v) i sink (ma) ch1 ch2 ta=25 rl=1kohm
FAN8026D (ka3026d) 11 dc motor drive ic typical performance characteristics (continued) < i load & v o (load regulation (tray part) )>
i load (a) v o (v) do4+ do4- ta=25 vcc=8v, ctl=3.5v fwd=5v, rev=0v do4+ fwd=0v, rev=5v do4- < ctl & output vtg (tray part) > ctl (v) v o (v) ta=25 vcc=13v rl=24ohm fwd=5v, rev=0v < temp & g vc > temp ( ) g vc (db) vcc=vm12=vm34=5v rl1=8ohm (ch1,2) rl2=24ohm(ch3) < temp & output vtg (tray part) >
temp ( ) v o (v) vo1 vo2 vcc=vm34=8v ctl=6.8v vo1 vcc=vm34=13v ctl=9.5v vo2 rl=24ohm
FAN8026D (ka3026d) 12 dc motor drive ic test circuits 28 27 26 25 24 23 22 21 20 19 18 17 16 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 do1+ do1- pgnd2 do2+ do2- vm1,2 mute4 do3+ do3- pgnd1 vm3,4 do4+ do4- vcc in1.1 in1.2 out1 in3.1 in3.2 out3 in2 sgnd ctl fwd rev ref mute1,2 mute3 FAN8026D opin(+) opin( ? ? op - amp op in (+) op in (-) op out op in (+) op in (-) op out ~ + vref mute1,2 mute3 mute4 ctl fwd rev 8 ? ? ? ?
FAN8026D (ka3026d) 13 dc motor drive ic typical application circuits 1 (diffential pwm control mode) 28 27 26 25 24 23 22 21 20 19 18 17 16 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 do1+ do1- pgnd2 do2+ do2- vm1,2 mute4 do3+ do3- pgnd1 vm3,4 do4+ do4- vcc in1.1 in1.2 out1 in3.1 in3.2 out3 in2 sgnd ctl fwd rev ref mute1,2 mute3 FAN8026D servo amp focus tracking pwm1 forward reverse control (tray) bias voltage focus, tracking mute sled mute sled motor vcc tray motor 12v 5v tracking actuator focus actuator 5v sled pwm1 pwm2 pwm2 bias bias tray mute
FAN8026D (ka3026d) 14 dc motor drive ic typical application circuits 2 (voltage control mode) ordering information device package operating temperature FAN8026D 28-ssoph-375 -35
FAN8026D (ka3026d) 15 dc motor drive ic
FAN8026D (ka3026d) dc motor drive ic 12/28/99 0.0m 001 stock#dsxxxxxxxx ? life support policy fairchild?s products are not authorized for use as critical components in life support devices or systems without the express written approval of the president of fairchild semiconductor corporation. as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2. a critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com
dc motor drive ic ?2000 fairchild semiconductor corporation www.fairchildsemi.com rev. 1.0.0 features ? 4-ch balanced transformerless (btl) driver 3-ch (forward - reverse) control dc motor driver operating supply voltage (4.5 v ~ 13.2 v) built-in thermal shut down circuit (tsd) built-in all channel mute circuit built-in power save mode circuit built-in stand by mode circuit built-in variable regulator description the fan8037 is a monolithic integrated circuit suitable for a 7-ch motor driver which drives the tracking actuator, focus actuator, sled motor, tray motor, changer motor, panel motor and, spindle motor of the cdp/car-cd systems. 48-qfph-1414 typical application compact disk player (tray, changer) video compact disk player (tray, changer) car compact disk player (tray, changer) mixing with compact disk player and mini disk player (tray, changer, panel) fan8037 (ka3037) 7-ch motor drive ic
fan8037 (ka3037) 2 dc motor drive ic pin assignments 1 2 3 4 5 6 7 8 9 27 26 25 13 14 15 16 17 18 19 20 21 22 23 24 48 47 46 45 44 43 42 41 40 39 38 37 30 29 28 32 32 31 36 35 34 fan8037 in2+ in2 ? ? ? ? ? ? ? ? ? ? ?
fan8037 (ka3037) 3 dc motor drive ic pin definitions pin number pin name i/o pin function descrition 1 in2+ i ch2 op-amp input (+) 2in2 ? ? ? ? ? ? ? ? ? ? ? ? ? ?
fan8037 (ka3037) 4 dc motor drive ic pin definitions (continued) pin number pin name i/o pin function descrition 33 do3 ? ? ? ? ? ? ? ?
fan8037 (ka3037) 5 dc motor drive ic internal block diagram notes: 1. sw = logic switch 2. msc = motor speed control 3. d = output driver + ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
fan8037 (ka3037) 6 dc motor drive ic equivalent circuits description pin no. internal circuit input opin (+) opin ( ?
fan8037 (ka3037) 7 dc motor drive ic equivalent circuits (continued) description pin no. internal circuit power save standby 20,21 mute 22 logic drive output 24, 25 26, 27 29,30 4-ch drive output 31, 32 33, 34 36, 37 38, 39 svcc 20 21 50k 50k 0.05k svcc 22 svcc 50k 50k 0.05k svcc 24 25 26 27 25k pvcc2 1k 30k 29 30 svcc 31 32 33 34 25k pvcc1 20k 36 37 20k 38 39 svcc
fan8037 (ka3037) 8 dc motor drive ic equivalent circuits (continued) description pin no. internal circuit ref 44 resx 43 reg0x 41 regx 42 svcc 44 1k 20k 20k 1k 0.05k svcc 50k 50k svcc 43 0.05k svcc 1k svcc 41 0.05k svcc 42 25k svcc 60k svcc 0.05k 0.5k
fan8037 (ka3037) 9 dc motor drive ic absolute maximum ratings ( ta=25 c) notes: 1. when mounted on 70mm recommended operating conditions ( ta=25 c) parameter symbol value unit maximum supply voltage svcc max 18 v pvcc1 18 v pvcc2 18 v power dissipation p d 3 note w operating temperature t opr ? ? parameter symbol min. typ. max. unit operating supply voltage svcc 4.5 - 13.2 v pvcc1 4.5 - svcc v pvcc2 4.5 - svcc v 3,000 2,000 1,000 0 0 25 50 75 100 125 150 175 pd (mw) ambient temperature, ta [
fan8037 (ka3037) 10 dc motor drive ic electrical characteristics (sv cc = pv cc1 = pv cc2 = 8v, t a = 25 c, unless otherwise specified) parameter symbol conditions min. typ. max. units quiescent circuit current i cc under no-load 15 25 35 ma power save on current i ps pin21=gnd - 1 2 ma stand by on voltage v sbon pin20=variation - - 0.5 v stand by off voltage v sboff pin20=variation 2 - - v power save on voltage v pson pin21=variation - - 0.5 v power save off voltage v psoff pin21=variation 2 - - v all mute on voltage v mon pin22=variation - - 0.5 v all mute off voltage v moff pin22=variation 2 - - v driver part (r l =8 ? ? ? ? ) output offset voltage v oo v in =2.5v ? ? ? input opamp part input offset voltage v of - ? ? ? ?
fan8037 (ka3037) 11 dc motor drive ic electrical characteristics (continued) (sv cc = pv cc1 = pv cc2 = 8v, t a = 25 c, unless otherwise specified) parameter symbol conditions min. typ. max. units tray, changer,panel drive part (r l =45 ? ? ? ? ) input high level voltage v ih -2--v input low level voltage v il ---0.5v output voltage 1 v o1 v cc =8v, v ctl =3v, r l =8 ? ? ? ? ? ? variable regulator part load regulation ? ? ? ?
fan8037 (ka3037) 12 dc motor drive ic application information 1. thermal shutdown when the chip temperature reaches to 175 c, then the tsd circuit is activated. this shut down the bias current of the output drivers, and all the output drivers are in cut-off state. thus the chip temperature begin to decrease. when the chip temperature falls to 150 c, the tsd circuit is deactivated and the output drivers are normally operated. the tsd circuit has the hysteresis temperature of 25 c. 2. all mute function when the pin22 is high, the tr q1 is turned on and q2 is off, so the bias circuit is enabled. on the other hand, when the pin22 is low (gnd) , the tr q1 is turned off and q2 is on, so the bias circuit is disabled. that is, this function will cause all the output drivers to be in mute state. truth table is as follows; 3. power save function when the pin21 is high, the tr q3 is turned on and q4 is off, so the bias circuit is enabled. on the other hand, when the pin21 is low (gnd) , the tr q3 is turned off and q4 is on, so the bias circuit is disabled. that is, this function will cause all the circuit blocks of the chip except for the variable regulator to be in the off state. thus the low power quiescent state is established truth table is as follows; pin#22 fan8037 high mute-off low mute-on pin#21 fan8037 high power save off low power save on svcc r2 r3 q0 output driver bias hysteresis r1 ihys i ref 22 q1 bias blocks (4-ch btl and 3-ch logic loading) q2 svcc 21 q3 main bias (except for variable reg.) svcc q4
fan8037 (ka3037) 13 dc motor drive ic 4. standby function when the pin20 is high, the tr q5 is turned on and q6 is off, so the bias circuit is enabled. on the other hand, when the pin20 is low (gnd) , the tr q5 is turned off and q6 is on, so the bias circuit is disabled. that is, this function will cause the output drivers of the 4-ch btl part(focus, tracking, spindle, sled) to be in off state. truth table is as follows 5. regulator & reset function the regulator and reset circuits are illustrated in the figure 1. the external circuit is composed of the pnp transistor(ksb772), capacitor(about 33 f) and 2 feedback resistors. the capacitor is used as a ripple eliminator and should have good temperature characteristics. the regulator output voltage is decided as follows. v reg = (1+r1/r2) 2.5 when the voltage of the pin 43 (vreset) is high, the regulator circuit operates normally. if the voltage of pin 43 is low, the regulator circuit is disabled . figure 1. regulator circuit pin#20 ka3037 high standby off low standby on 20 q5 bias block (4-ch btl output driver) q6 svcc + ? fan8037
fan8037 (ka3037) 14 dc motor drive ic 6. focus, tracking actuator, spindle, sled motor drive part the voltage, vref is the reference voltage given by the external bias voltage of the pin 44. the input signal (vin) through pins 46,1,4 and 7 is amplified one time and then fed to the output stage. (assume that input opamp was used as a buffer) the total closed loop voltage gain is as follows if you want to change the total closed loop voltage gain, you must use the input opamp as an amplifier the output stage is the balanced transformerless (btl) driver. the bias voltage vp is expressed as ; 44 vref 46 1 4 48 3 6 47 2 5 8 + ? ? ? ? ? + = dop vp 2 v ? + = don vp 2 ? v ? = vout dop don 4 v ? = ? = gain 20 vout v ? ------------ - log 20 4 log 12db = == vp pvcc1 vdp ? vcesatqp ? () + ------------------------- - + = pvcc1 vdp ? vcesatqp + 1.97 -------------------------------------------------------------------------- - = vcesatqp + - - - - - - - - - - (1)
fan8037 (ka3037) 15 dc motor drive ic 7. tray, changer,panel motor drive part rotational direction control the forward and reverse rotational direction is controlled by fwd (pin 11,14, 17) and rev (pin 12,15,18) and the input conditions are as follows. where vp(power referencd voltage) is approximately about 3.75v at pvcc2=8v ) acording to equation (1). where out1 pins are pins24,26,29 and out2 pins are pins25,27,30 motor speed control (when svcc=pvcc2=8v) - the almost maximum torque is obtained when the pins (10,13 and 19 (ctl1, 2, 3)) are open. - if the voltage of the pins (10,13 and 19 (ctl1, 2, 3)) are 0v, the motor will not operate. - when the control voltage of the pins 10,13 and 19 (ctl1, 2, 3) are between 0 and 3.25v, the differential output voltage(v(out1,out2)) is about two times of control voltage. hence, the control to the differential output gain is two. - when the control voltage is greater than 3.25v, the output voltage is saturated at the 6.5v because of the output swing limitation. input output fwd rev out 1 out 2 state h h vp vp brake hlhlforward lhlhreverse l l - - hign impedance m 24 26 25 27 13 19 14 17 15 18 out 1 out 2 d level shift m.s.c s.w d ctl1,2,3 in fwd rev in 11 12 10 29 30 v(out1,out2) v ctl 0 6.5v 3.25v
fan8037 (ka3037) 16 dc motor drive ic 8. bootstrapped operation our ic has two kinds of power supplies, the power supply , svcc is for predrivers and the other circuit blocks(svcc), and pvcc1 and pvcc2 is for the power transistors. when svcc=pvcc n (n= 1,2), no bootstapped operation occurs. thus the single-ended maximum output voltage is about to if larger output swing is requied, use the bootstrap function. when the bootsrap function is operated. in the mode, the single-ended maximum output voltage is about to ; hence wide output dynamic range can be obtained. vout svcc pvcc predriver power trs (pd) q1 q2 q3 svcc vcesatq3 vbe1 + () ? ? ? svcc pvccn 1v + > ? ? ?
fan8037 (ka3037) 17 dc motor drive ic test circuits i l i l 37 38 39 40 41 42 43 44 45 46 47 48 9 10 11 12 8 7 6 5 4 1 2 3 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 31 32 33 34 35 36 op in (+) op in (-) op out r l2 i l i l ctl2 opin(+) opin( ? fan8037 in2+ in2- out2 in3+ in3 ? ? ? ? ? ? ? ? ? ? ? op - amp part ctl3 in3a in3b ripple r l7 i l i l
fan8037 (ka3037) 18 dc motor drive ic typical application circuits 1 [voltage control mode] notes: radiation pin is connected to the internal gnd of the package. connect the pin to the external gnd. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 m m m ty cg pl control tray input changer input vref focus input tracking input sled input spindle input [servo pre amp] [controller] where ty is tray motor. cg is changer motor fan8037 out1 in1 ? ? ? ? ? ? ? ? ? ?
fan8037 (ka3037) 19 dc motor drive ic typical application circuits 2 [ differential pwm control mode ] notes: radiation pin is connected to the internal gnd of the package. connect the pin to the external gnd 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 m m m ty cg pl control tray input changer input vref focus input tracking input sled input spindle input [servo pre amp] [controller] where ty is tray motor. cg is changer motor fan8037 out1 in1 ? ? ? ? ? ? ? ? ? ?
fan8037 (ka3037) 20 dc motor drive ic ordering information device package operating temperature fan80037 48-qfph-1414 ?
fan8037 (ka3037) dc motor drive ic 12/28/99 0.0m 001 stock#dsxxxxxxxx ? life support policy fairchild?s products are not authorized for use as critical components in life support devices or systems without the express written approval of the president of fairchild semiconductor corporation. as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2. a critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com
dc motor drive ic ?2000 fairchild semiconductor corporation www.fairchildsemi.com rev. 1.0.0 features ? 4-ch h-bridge driver built-in dc/dc converter controller circuit built-in reset circuit built-in battery charging circuit built-in voltage drop detector built-in thermal shutdown circuit built-in general op-amp low power consumption built-in power controller circuit description fan8038 is monolithic ic for portable cd player. typical application portable compact disk player diskman mini-disk fan8038 (ka3038) 4-ch motor drive ic
fan8038 (ka3038) 2 dc motor drive ic pin assignments

fan8038 (ka3038) 3 dc motor drive ic pin definitions pin number pin name pin function descrition 1 ovp battery power supply mode 2 batt battery power supply 3 rstout rstout detection output 4 dedset dedset time setting 5 bdsw booster transistor drive 6 erro error amp output 7 erri error amp input 8 scp short circuit protection setting 9 cosc triangular wave output 10 n.c no connection 11 opin( ?)
fan8038 (ka3038) 4 dc motor drive ic internal block diagram

2 2 2 2 2 2 2 2

fan8038 (ka3038) 5 dc motor drive ic absolute maximum ratings (ta = 25 c) recommended operating conditions (ta = 25 c) parameter symbol value unit maximum supply voltage v cc 13.2 v maximum output current i o 500 ma power dissipation p d 1.0 w operating temperature t opr ? ? parameter symbol min. typ. max. unit charging circuit power supply voltage adpvcc 3.0 4.5 8.0 v power supply voltage batt 1.5 2.4 8.0 v control circuit power supply voltage svcc 2.7 3.2 5.5 v pre-driver v cc svcc2 2.7 3.2 5.5 v output voltage vm - pwm batt v operating temperature ta -10 25 70
fan8038 (ka3038) 6 dc motor drive ic electrical characteristics (ta=25 c, batt=2.4v, svcc1=svcc2=3.2v, vref=1.6v, adpvcc=0v, fclkin=88.2khz) parameter symbol conditions min. typ. max. units common section batt stand-by current i st batt=10.5v,svcc1,2=vref= 0v --5 h-drive part voltage gain ch1, 3, 4 ch2 g vc 134 g vc 2 -12 21.5 14 23.5 16 24.5 db gain error by polarity ? ? ? ? ? ? ? ? ?
fan8038 (ka3038) 7 dc motor drive ic electrical characteristics (continued) parameter symbol conditions min. typ. max. units pwm power supply driving pwm sink current i pwm di1=2.1v 10 13 17 ma dvcc level shift voltage v shif di1=1.8v, dvcc-out1f 0.35 0.45 0.55 v dvcc leak current i dlk dvcc=9v, svcc1,2=batt=0v - 0 5 ? dc/dc converter error amp svcc1 pin threshold voltage v s1th - 3.05 3.20 3.35 v erro pin output voltage h v eoh erri=0.7v, io= ? short circuit protection scp pin voltage v scp erri=1.3v - 0 0.1 v scp pin current 1 i scp1 erri=0.7v 6 10 16 ? transistor driving bdsw pin output voltage 1h v sw1h batt=cosc=1.5v =svcc2=0v, 10ma 0.78 0.98 1.13 v bdsw pin output voltage 2h v sw2h cosc=0v, io= ?
fan8038 (ka3038) 8 dc motor drive ic electrical characteristics (continued) parameter symbol conditions min. typ. max. units dead time dedset pin impedance r dedset - 526578k ? interface stop pin threshold voltage v stopth erri=1.3v 2.0 - - v stop pin bias current i stop off=0v 75 95 115 start curcuit starter switching voltage v ssv svcc1,svcc2=0v reset circuit svcc1 reset threshold voltage ratio r rstoth - 859095% reset detection hysteresis width v rsths -2550100mv rstout pin output voltage v rsto io=1ma, svcc1,svcc2=2.8v --0.5v rstout pin pull up resistance r rsto -7290108k ? ? ? ?
fan8038 (ka3038) 9 dc motor drive ic electrical characteristics (continued) parameter symbol conditions min. typ. max. units op-amp input bias current i bias in(+)=1.6v - - 300 na input offset voltage v ofop in(+)=1.6v ? ? ? ? ? ? battery charging curcuit chgset pin bias voltage v chgset adpvcc=4.5v, chgset=1.8k ? ? ? ? empty detection emp detection voltge 1 v empt1 v empset =0v 2.1 2.2 2.3 v emp detection voltge 2 v empt2 i empset = ? ? ? ?
fan8038 (ka3038) 10 dc motor drive ic application information 1. mute function when the brake pin is low is normal opration (high is ch1 mute on). when the mute2 pin is low is normal opration (high is ch2 mute on). when the mute34 pin is high is normal opration (low is ch3,4 mute on). 2. vref drop mute (figure 1) when the voltage of the mute pin is above 1v, the mute circuit is stopped and the output circuit is. 3. thermal shutdown(figure 2) if the chip temperature rises above 150 c, then the thermal shutdown (tsd) circuit is activated and the output circuit will be mute. 4. h-bridge driver (4-channels) driver input resistance is 10k ? of ch1, ch3, ch4 and input resistance of ch2 is 7.5k ? . driver gain can obtain under -mentioned r is external resistance.
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" ch1, 3, 4: gv 20 55k 11k r + --------------------- log = ch2 gv = 20log 110k 7.5k r + ---------------------- - figure 1. vref drop mute circuit figure 2. tsd c
fan8038 (ka3038) 11 dc motor drive ic 5. switching regulated power supply drive this circuit detects a maximum output value of 4ch drivers and then generates pwm signal. external component is pnp-tr, coil, schottky diodeand capacitor . figure 1. switching regulated power supply 6. dc/dc converter control circuit booster circuit needs external component. and the voltage() is defined as follows. figure 2. output voltage

svcc1 1.267 r1 r3 ? + --------------------- - r2 r4 ? + --------------------- - + r2 r4 ? + --------------------- - --------------------------------------------------- = r1 resistor1 = r2 resistor2 = r3 30k ? = r4 30.5k ? =
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fan8038 (ka3038) 12 dc motor drive ic short circuit protection function when gnd and is short, erri become low and erro high and it makes capacitor charging. fanally amp3 is off.(figure 5) figure 3. dc/dc converter control circuit switching off time depen on a capacitor of the scp . and the equation is as follow. max duty can be controlled resistor. the equation is as follow capacitor of the scp terminal can control disable switiching time and it can be calculated by as follow equation. over voltage protection batt voltage is over 9.7v charging scp terminal capacitor, it reach to v th sw terminal signal is off the equation is as follow if output voltage of rstout circuit dc/dc conver is over than 90%, rstout terminal turn to high and hysteresis is 50mv. and rstout stste is on.

tc scp v th i scp ----------- - = v th 1.25v, i sprt 10 == () = r65k ? = () --------------- = v th 1.25v, i off 20 == () ---------- = v th 1.25v, i hv 20 == ()
fan8038 (ka3038) 13 dc motor drive ic 7. empty detecting circuit. 8. battery charging circuit the battery charger circuit is separated from any other block . tsd operate at 150 c. hysteresis is 30 c empset detect voltage hysteresis mode low 2.2v 50mv battery mode high-z 1.8v 50mv adapter mode
fan8038 (ka3038) 14 dc motor drive ic typical perfomance characteristics

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fan8038 (ka3038) 15 dc motor drive ic typical application circuits ordering information device package operating temperature fan8038 44-qfp-1010b ?

2 2 2 2 2 2 2 2

fan8038 (ka3038) dc motor drive ic 12/28/99 0.0m 001 stock#dsxxxxxxxx ? life support policy fairchild?s products are not authorized for use as critical components in life support devices or systems without the express written approval of the president of fairchild semiconductor corporation. as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2. a critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com
cd-media one chip ic ?2000 fairchild semiconductor corporation www.fairchildsemi.com rev. 1.0.0 features common ? built-in thermal shutdown circuit (tsd) built-in power save circuit 3 independent voltage source corresponds to 3.3v or 5v dsp spindle built-in hall bias built-in fg signal output circuit built-in rotational direction detecting circuit built-in protection circuit for reverse rotation built-in short brake circuit btl (5-channel) built-in 5-ch balanced transformerless (btl) driver built-in level shift circuit independent voltage sources - vm2 = ch1,ch2 / vm3 = ch3, ch4 ,ch5 description the fan8725 is a monolithic ic suitable for a 3-phase bldc spindle motor driver and 5-ch motor drivers which drives the focus actuator, tracking actuator, loading motor, stepping motor driver of the cd-media systems. 48-qfph-1414 typical applications compact disc rom digital video disc rom compact disc recorderable digital video disc player compact disc player fan8725 (ka3025) spindle and 5-ch driver
fan8725 (ka3025) 2 cd-media one chip ic pin assignments 1 2 3 4 5 6 7 8 9 27 26 25 13 14 15 16 17 18 19 20 21 22 23 24 48 47 46 45 44 43 42 41 40 39 38 37 30 29 28 32 32 31 36 35 34 fan8725 h1+ h1- h2+ h2- h3+ h3- fg dir svcc1 vm1 cs1 pgnd1 10 11 12 do5 - do5+ do4 - do4+ do3 - do3+ pgnd2 do2 - do2+ do1 - do1+ out1 vh pc1 ec ecr ps sb vref svcc2 vm3 out5 in5 pgnd3 a1 a2 a3 in4 out4 sgnd2 in3 out3 in2 out2 vm2 in1
fan8725 (ka3025) 3 cd-media one chip ic pin definitions pin number pin name i/o pin function description 1 h1- i hall 1(-) input 2 h1+ i hall 1(+) input 3 h2+ i hall 2(-) input 4 h2- i hall 2(+) input 5 h3+ i hall 3(-) input 6 h3- i hall 3(+) input 7 fg o frequency generator output 8 dir o rotation direction output 9 svcc1 - spindle signal supply voltage 10 vm1 - spindle power supply 11 cs1 i spindle current sense 12 pgnd1 - spindle power ground 13 a1 o 3-phase output1 14 a2 o 3-phase output2 15 a3 o 3-phase output3 16 sgnd2 - ch signal ground 17 in4 i op-amp ch 4 input(-) 18 out4 o op-amp ch 4 output 19 in3 i op-amp ch 3 input(-) 20 out3 o op-amp ch 3 output 21 in2 i op-amp ch 2 input(-) 22 out2 o op-amp ch 2 output 23 vm2 - ch1/ch2 power supply 24 in1 i op-amp ch 1 input(-) 25 out1 o op-amp ch 1 output 26 do1+ o channel 1 output ( +) ?) +) ?) +) ?) +)
fan8725 (ka3025) 4 cd-media one chip ic pin definitions (continued) notes: btl drive part symbol(+,- outputs of drives) is determined according to the polarity of input pin. (for example, if the voltage of pin 24 is high, the output of pin 26 is high) pin number pin name i/o pin function description 34 do4 - o channel 4 output ( ?) +) ?)
fan8725 (ka3025) 5 cd-media one chip ic internal block diagram 48 45 46 47 43 44 42 41 40 39 38 37 13 16 15 14 18 17 19 20 21 22 23 24 36 33 34 35 31 32 30 29 28 27 26 25 1 4 3 2 6 5 7 8 9 10 11 12 distributor driver pgnd1 cs1 svcc1 vm1 dir fg h3+ h2 - h2+ h1+ h1 - h3 - pc1 ec ecr vh a3 a2 a1 pgnd3 svcc2 vm3 vref hall amp absolute values current sense amp output current limit cs1 vm short brake fg generator logic detection reverse rotation hall bias pgnd2 in3 out3 sgnd2 vm2 ps sb fin(gnd) fin(gnd) fin(gnd) fin(gnd) in2 out2 in1 out1 do1+ do1 - do2+ do3 - do3+ do4 - do4+ do5 - do5+ do2 - in4 out4 in5 out5 vm3 r r vm3 vm2 vm3 vm2 r r vm2
fan8725 (ka3025) 6 cd-media one chip ic equivalent circuits (spindle part) hall input driver output torque control input hall bias input power save input short brake input fg output dir output 1k ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
fan8725 (ka3025) 7 cd-media one chip ic equivalent circuits (btl part) op-amp input op-amp output drive output vref 1k ? ? ? ? ? ? ? ? ? ? ?
fan8725 (ka3025) 8 cd-media one chip ic absolute maximum ratings (ta = 25 o c) recommended operating conditions (ta = 25 o c) parameter symbol value unit supply voltage (spindle signal) supply voltage (btl signal) supply voltage (spindle motor) supply voltage (btl ch1/2) supply voltage (btl ch3/4/5) power dissipation operating temperature range storage temperature range maximum output current (spindle part) maximum output current (btl part) sv cc1max sv cc2max v m1max v m2max v m3max p d t opr t stg i omaxa i omaxb 7 15 15 15 15 @3.0 -20 ~ +75 -55 ~ +150 1.3 0.6 v v v v v w parameter symbol min. typ. max. unit operating supply voltage (spindle signal) sv cc1 4.5?5.5v operating supply voltage (btl signal) sv cc2 10.8?13.2v operating supply voltage (spindle motor) v m1 10.8?13.2v operating supply voltage (btl ch1/2) v m2 4.5 ? sv cc2 v operating supply voltage (btl ch3/4/5) v m3 4.5 ? sv cc2 v 175 150 125 100 50 25 0 1,000 2,000 3,000 pd [mw] ambient temperature, ta [
fan8725 (ka3025) 9 cd-media one chip ic electrical characteristics (ta = 25 o c) parameter symbol condition min. typ. max. units full chip quiescent circuit current 1 i cc1 full chip (ps=0v) ? 0 0.2 ma quiescent circuit current 2 i cc2 spindle (ps=5v) ? 5 10 ma quiescent circuit current 3 i cc3 btl ( ps=5v) ? 20 30 ma power save on voltage range v pson l-h circuit on 2.5 ? vcc v off voltage range v psoff h-l circuit off ? ? 1.0 v hall bias hall bias voltage v hb i hb =20ma 0.4 1.0 1.8 v hall amp hall bias current i ha ?0.52ua common mode input range v har 1.5 ? 4.0 v minimum in level v inh 100 ? ? mvpp h1 hysteresis v hys 52040mvpp torque control ecr in voltage range e c r 0.2 ? 4.0 v ec in voltage range e c 0.2 ? 4.0 v offset voltage (-) e coff- e c =1.9v -80 -50 -20 mv offset voltage (+) e coff+ e cr =1.9v 205080mv e c in current e cin e c =1.9v -3 -0.5 ? ua e cr in current e crin e cr =1.9v -3 -0.5 ? ua in/output gain g ec e cr =2.5v, r cs =0.5 ? fg fg output voltage (h) v fgh i fg = -10ua 4.5 4.9 v cc v fg output voltage (l) v fhl i fg =10ua ? ? 0.5 v duty(reference value) r cs =0.5 ? output block saturation voltage (upper tr) v oh i o = -300ma ? 1.0 1.4 v saturation voltage (lower tr) v ol i o =300ma ? 0.4 0.7 v torque limit current i tl r cs =0.5 ? direction detector dir output voltage (h) v dirh i fg =-10ua 4.5 4.7 v dir output voltage (l) v dirl i fg =10ua ? ? 0.5 v short brake on voltage range v sbon 2.5 ? v cc v off voltage range v sboff 0?1.0v
fan8725 (ka3025) 10 cd-media one chip ic electrical characteristics (continued) btl drive part (ta=25 c, sv cc2 =12v, v m2 =5v, v m3 =12v, r l =8, 24 ? ? ? ? ) parameter symbol condition min. typ. max. units ch1/ch2 output offset voltage1,2 v of1/2 -95 ? 95 mv maximum output voltage1,2 v om1/2 v m2 =5v,rl=8 ? ch3/ch4/ch5 output offset voltage3,4,5 v of3/4/5 -95 ? 95 mv maximum output voltage3,4,5 v om3/4/5 v m3 =12v,rl=24 ? op-amp part common mode input range v icm 0?11.0v input bias current
fan8725 (ka3025) 11 cd-media one chip ic application information 1. torque control & output current control 1) by amplifying the voltage difference between ec and ecr from servo ic, the torque sense amp produces the input (v amp ) for the current sense amp. 2) the output current (i o ) is converted into the voltage (v cs ) through the sense resistor (r cs ) and compared with the v amp . by the negative feedback loop, the sensed output voltage, vcs is equal to the input v amp . therefore, the output current (i o ) is linearly controlled by the input v amp . 3) as a result, the signals, e c and e cr can control the velocity of the motor by controlling the output current (i o ) of the driver. 4) the range of the torque voltage is as shown below. + - + - to r q u e a m p ec ecr v m ecr-ec current sense amp tsd gain controller driver m rcs vcs + - io v m v amp + - forward ecoff+ ecoff- reverse current [ma] 6 -1.0 v 0 1.0 v e cr -e c rotation e cr > ec forward rotation e cr < ec stop after detecting re- verse rotation the input range of e cr, e c is 0.2 v ~ 4.0 v ( r cs = 0.5[ ?
fan8725 (ka3025) 12 cd-media one chip ic 2. short brake when the pick-up part moves from the inner to the outer spindle of the cd, the brake function of the reverse voltage is com- monly employed to decrease the rotating velocity of the spindle motor. however, if the spindle motor rotates rapidly, the brake function of the reverse voltage may produce much heat at the drive ic. to remove this shortcoming and to enhance the braking efficiency, the short brake function is added to fan8725. when the short brake function is activated, all upper power trs turn off and all lower power trs turn on, so as to make the rotating velocity of the motor slow down. but fg and dir functions continue to operate normally. 3. power save when ps function is activated, the chip is deactivated. pin # 43 short brake high on low off pin # 44 power save high operate low sleep mode 43 vcc on off 20k ? ? ? ? ic bias
fan8725 (ka3025) 13 cd-media one chip ic 4. tsd (thermal shutdown) when the chip temperature rises up to about 175c(degree), the q2 turns on so that the output driver will be shutdown. when the chip temperature falls off to about 150c(degree), then the q2 turns off so that the driver is to operate normally. thus, ts d has the temperature hysteresis of about 25c(degree). -- the tsd circuit shuts down all the power drives(spindle and btl power drives) excluding both ch1 and ch2 power drives(actuator part). 5. rotational direction detection 1) the forward and the reverse rotations of the cd are simply detected by using the d-f/f and the truth table is shown in the above table. 2) the rotational direction of the cd can be explained by the output waveform of the hall sensors. let the three outputs of hall sensors be h1, h2 and h3 respectively. when the spindle rotates in reverse direction, the hall sensor output waveform are shown in fig.(a). thus the phases ordered in h1 h2 h3 with a 120 phase difference. gain controller bias q2 + - + - vcc dir d-f/f d q ck h2+ h3+ h3- h2- rotation dir forward low reverse high 8 8 (a) reverse rotation h1 h2 h3
fan8725 (ka3025) 14 cd-media one chip ic on the other hand, if the spindle rotates in forward rotation, the phase relationship is h3?h2?h1 as shown in fig.(b) therefore, the output of the rotational direction detector is low, when the spindle rotates forward, while high as in the case of the reverse rotation. 6. reverse rotation prevention 1) when the output of the or gate, a is low, it steers all the output current of the current sense amp makes the current delivered to the gain controller zero. thus the output current of the driver becomes zero and the motor is stopped. 2) as in the state of the forward rotation, the d-f/f output, q is high and the motor rotates normally. at this state, if the control input is changed such that ec>ecr, then the motor rotates slowly more and more by the reverse commutation in the driver. at the moment that the motor rotates in reverse direction, the d-f/f output becomes low and the or gate out- put, thus, becomes low. this prevents the motor from rotating in reverse direction. the operation principle is shown in the table and the flow chart. (b) forward rotation h1 h2 h3 + - + - + - current sense amp gain controller driver d-f/f m d q ck h3+ h3- h2+ h2- ec ecr a low active
fan8725 (ka3025) 15 cd-media one chip ic 7. fg output 8. hall sensor connection rotation h2 h3 d-f/f (q) reverse rotation preventer e cr >e c e c >e cr forward h h
fan8725 (ka3025) 16 cd-media one chip ic 9. connect a bypass capacitor, from all the supply voltage sources to ground. (typically 0.1uf, or even higher) 10. the heat radiation fin is connected to the internal gnd of the package. connect the fin to the external gnd. svcc1, svcc2, v m1 , v m2 , v m3 0.1uf
fan8725 (ka3025) 17 cd-media one chip ic 11. input-output timing chart h1 + h2 + h3 + a1 output current (h1 -)+(h2 +) a3 output current (h3 -)+(h1 +) a3 output voltage a2 output voltage a2 output current (h2 -)+(h3 +) a1 output voltage
fan8725 (ka3025) 18 cd-media one chip ic 12. btl drive part the reference voltage ref is given externally through pin 42. the error amp output signal is amplified by r2 / r1 times and then fed to the power amp part. the power amp part produces the differential output voltages and drives the two output power amplifier circuit. since the differential gain of the output amplifiers of ch1/ch2 is equal to 2 (25k / 10k) , the output signal of the error amp is amplified by (r2 / r1) 5. since the differential gain of the output amplifiers of ch3/ch4/ch5 is equal to 2 (40k / 10k) , the output signal of the error amp is amplified by (r2 / r1) 8. if the total gain is insufficient, the input error amp can be used to increase the gain. the ch1/ch2 are generally used as actuator drive part so this channels are not affected by tsd circuit. + ? ? ? ? ? ?
fan8725 (ka3025) 19 cd-media one chip ic typical application circuits ordering information device package operating temperature fan8725 48-qfph-1414 ? pgnd1 cs1 svcc1 vm1 dir h3+ h2 - h2+ h1+ h1 - h3 - pc1 ec ecr vh fg a3 a2 a1 pgnd3 svcc2 vm3 vref pgnd2 in3 out3 sgnd2 ps fan8725 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 21 22 23 20 24 48 47 46 45 44 43 42 40 39 38 41 37 36 35 34 33 32 31 30 28 27 26 29 25 svcc 1 vm1 m focus actuator tracking actuator sled (stepping) motor loading motor svcc2 vm3 m sb sled1 signal tracking signal loading signal focus signal sled2 signal servo signal power save short brake vm2 hall1 hall2 hall3 in2 out2 vm2 in1 out1 in4 out4 do1+ do1 - do2+ do2 - do3+ do3 - do4+ do4 - do5+ do5 - in5 out5
fan8725 (ka3025) cd-media one chip ic 12/28/99 0.0m 001 stock#dsxxxxxxxx ? life support policy fairchild?s products are not authorized for use as critical components in life support devices or systems without the express written approval of the president of fairchild semiconductor corporation. as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2. a critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com
etc. drive ic ?2000 fairchild semiconductor corporation www.fairchildsemi.com rev. 1.0.0 features ? high current output: 1.0a source and 2.0a sink protection against overcurrent and short circuit cmos compatible input and fault status indicator programmable fault-out duration time built in slow turn-off circuit under fault condition undervoltage lockout optimized for igbts negative gate drive capability suitable for integration in power modules -40 to 105c operating temperature description the fan8800 is a monolithic integrated circuit designed for driving single igbt with de-saturation and undervoltage protection. it is suitable for driving discrete and module igbts, and further, it offers a cost effective solution for driv- ing power mosfets. the integrated fault feedback notifies the controller when the igbt is shutdown due to a de-satu- ration or a over current condition. 8-dip typical applications gate drive for single insulated gate bipolar tr gate drive for single mosfet fan8800 (ka3162) single igbt gate driver
fan8800 (ka3162) 2 etc. drive ic pin assignments pin definitions pin number pin name pin function descrition 1 tdur fault output duration(adjustment capacitor for fault-out duration) 2 gnd ground 3 in inverting gate drive voltage output (vout) control input 4 vee gate drive voltage output 5 out output supply voltage (negative) 6v cc output supply voltage (positive) 7 fault fault output. fault changes from a logic low state to a logic high output when a fault condition is detected. 8 desat de-saturation voltage input. when the voltage on desat exceeds an internal reference voltage of 6.5v while the igbt is on, fault output is changed from a logic low state to a logic high state. 7 fan8800 1 2 3 45 6 7 8 t dur gnd in out v cc fault desat ( top view ) v ee
fan8800 (ka3162) 3 etc. drive ic internal block diagram delay fault fault-out duration t dur in uvlo buffer output circuit slow turn off control out desat 8 gnd vee vcc 6 4 5 3 2 1 7 ref1 6.5v ref2 4.5v s r q + - + -
fan8800 (ka3162) 4 etc. drive ic equivalent circuits driver input driver output fault out desat t dur vcc vee 3 5 vee vcc 7 vcc vee 2k 8 2k 300ua vee 1 2k vee
fan8800 (ka3162) 5 etc. drive ic absolute maximum ratings (ta = 25 c) recommened operating conditions (ta = 25 c) parameter symbol value unit power supply voltage v cc - vee 36 v output source current output sink current i o 1.0 2.0 a fault output source current fault output sink current if o 25 10 ma input voltage vin vee - 0.3 to v cc v de-saturation voltage v desat -0.3 to v cc v power dissipation and thermal characteristics maximum power dissipation @ta =25 parameter symbol min. typ. max unit total supply voltage v cc +13 +15 +18 v operating power supply voltage vee -13 -15 -18 v operating ambient temperature ta -40 25 105
fan8800 (ka3162) 6 etc. drive ic electrical characteristics (ta = 25 c) parameter symbol conditions min. typ. max. units logic input high input threshold voltage v ih --2.73.2v low input threshold voltage v il -1.22.3- drive output low output voltage v ol isink=1.0a - 2.0 2.4 v high output voltage v oh isource=500ma 12 14 - fault output low fault output voltage v fl isink=5.0a - 0.2 1.0 v high fault output voltage v fh isource=20ma 11 13.5 - uvlo start-up voltage v ccst -1111.512v disable voltage v ccdi -1010.511v uvlo hysteresis h y -0.91.011.1v desaturation input de-saturation current source i chg vin=0v, v desat =0v 210 300 380 ocp and scp ocp voltage reference v ocp - 4.0 4.5 5.0 power supply standby current i ccst vin = high, output open - 14 20 ma operating current i ccop cl=1.0nf, f=20khz - 20 30 ma propagation delay time to high output level t plh rg=0, cl=1.0nf f=10khz, duty cycle=50% - 0.35 0.7
fan8800 (ka3162) 7 etc. drive ic application information 1. fault-out duration time (t dur ) 1) two modes in fault-out duration. - ocp mode fault-out duration operates after t ocp . -scp mode if vpin8 is over 6.5v, fault-out duration will operate after t scp . 2) t dur (it can be adjusted by external capacitor (c dur ) is 2. slow turn-off (t slow ) 1) when scp (short circuit protection) is operated, q3 turns on and q2 turns on. 2) in the upper condition, q2 flows the constant current of 35ma. 3) the capacitance of igbt as the load is discharging by 35ma, that is slow turn-off. 4) slow turn-off time is t dur c dur 55 ? () ? = 2.7nf 55 ? () ? = 176 = 5 l o a d vlink q3 q2 q1 low low internal circuit t slow c igbt 35ma v5max v5min ? () ? = 4.7nf 35ma 15v 1v ? () ? = 1.9 =
fan8800 (ka3162) 8 etc. drive ic 3. ocp delay time (t ocp ) 1) if the saturation detector(desat or vpin8 ) is 4.5v < vpin8 < 6.5v, the fault-out signal will be high after t ocp . 2) t cop (this value is fixed internally) is 4. charge time in the de-saturation detection 1) when the signal of drive output (vpin5) is high, q4 turns on and it is operated de-saturation detection mode in upper fig- ure. in this mode, when it detects the voltage of collector- emitter terminal of igbt through d1. if vce(sat) + vf of d1 > 4.5v, it is operated ocp mode. if vce(sat) + vf of d1 > 6.5v, it is operated scp mode. when the input signal of igbt is from low-state to high-state, q4 turns off and it is operated de-saturation detection mode. on this times, the voltage of collector-emitter terminal of igbt is not saturation-state yet. this period is said on time delay (td (on) ). here, the operation of c desat is following ; when c desat is charged by current source of 300ua and so it prevents operating error for td (on) of igbt. 2) slope of vpin8 is t ocp 50pf 3 ? = 83 = 8 l o a d vlink 4.5v 6.5v internal circuit 300ua detect control c desat + - + - q4 d1 ? ? ? = ?
fan8800 (ka3162) 9 etc. drive ic timing chart uvlo operation input and output signal vpin6[v] time 10.5 11.5 15 vpin5[v] time disable voltage start-up voltage 15 0 0 input signal output signal t plh t phl tr tf
fan8800 (ka3162) 10 etc. drive ic timing chart (continued) ocp delay time scp delay time vpin8 signal time 4.5 0 output signal input signal vpin7 signal t ocp [v] t dur vpin8 signal time 6.5 0 output signal input signal vpin7 signal t scp [v] t dur t slow
fan8800 (ka3162) 11 etc. drive ic typical perfomance characteristics 1. vcc vs. icc 11.5 12 12.5 13 13.5 13 14 15 16 17 18 14 vcc[v] i ccst [ma] 2. temperature vs. i ccst 0 4 8 12 -50 -25 25 50 75 100 16 temperature[ ] i ccst [ma] 0 125 4. temperature vs. t phl 3. temperature vs. t plh 0 100 200 300 -50 -25 25 50 75 100 400 temperature[ ] t plh [ns] 0 125 0 100 200 300 -50 -25 25 50 75 100 400 temperature[ ] t phl [ns] 0 125 1. vcc vs. icc 11.5 12 12.5 13 13.5 13 14 15 16 17 18 14 vcc[v] i ccst [ma] 2. temperature vs. i ccst 0 4 8 12 -50 -25 25 50 75 100 16 temperature[ ] i ccst [ma] 0 125 4. temperature vs. t phl 3. temperature vs. t plh 0 100 200 300 -50 -25 25 50 75 100 400 temperature[ ] t plh [ns] 0 125 0 100 200 300 -50 -25 25 50 75 100 400 temperature[ ] t phl [ns] 0 125
fan8800 (ka3162) 12 etc. drive ic typical perfomance characteristics (continued) 5. temperature vs. t slow 6. temperature vs. i chg 200 250 300 350 -50 -25 25 50 75 100 400 temperature[ ] i chg [ua] 0 125 0 0.5 1.5 2.5 -50 -25 25 50 75 100 3.5 temperature[ ] i slow [us] 0 125 1 2 3 7. temperature vs. t ocp 50 60 80 100 -50 -25 25 50 75 100 120 temperature[ ] i ocp [us] 0 125 70 90 110 8. temperature vs. t scp 0 0.2 0.6 1 -50 -25 25 50 75 100 1.4 temperature[ ] i scp [us] 0 125 0.4 0.8 1.2 5. temperature vs. t slow 6. temperature vs. i chg 200 250 300 350 -50 -25 25 50 75 100 400 temperature[ ] i chg [ua] 0 125 0 0.5 1.5 2.5 -50 -25 25 50 75 100 3.5 temperature[ ] i slow [us] 0 125 1 2 3 7. temperature vs. t ocp 50 60 80 100 -50 -25 25 50 75 100 120 temperature[ ] i ocp [us] 0 125 70 90 110 8. temperature vs. t scp 0 0.2 0.6 1 -50 -25 25 50 75 100 1.4 temperature[ ] i scp [us] 0 125 0.4 0.8 1.2
fan8800 (ka3162) 13 etc. drive ic typical application circuits single power supply application dual power supply application vlink 1 2 3 4 8 7 6 5 fan8800 l o a d t dur gnd in vee desat fault vcc out fault output signal input vcc vcc + vlink 1 2 3 4 8 7 6 5 fan8800 l o a d t dur gnd in vee desat fault vcc out fault output signal input vcc vcc + 1 2 3 4 8 7 6 5 fan8800 l o a d gnd in vee desat fault vcc out vlink fault output signal input vee vcc + + t dur 1 2 3 4 8 7 6 5 fan8800 l o a d gnd in vee desat fault vcc out vlink fault output signal input vee vcc + + t dur
fan8800 (ka3162) 14 etc. drive ic ordering information device package operating temperature fan8800 8-dip -40
fan8800 (ka3162) 15 etc. drive ic
fan8800 (ka3162) etc. drive ic 12/28/99 0.0m 001 stock#dsxxxxxxxx ? life support policy fairchild?s products are not authorized for use as critical components in life support devices or systems without the express written approval of the president of fairchild semiconductor corporation. as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2. a critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com

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