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june 2012 ? 2011 fairchild semiconductor corporation www.fairchildsemi.com FSBH0F70WA/0170w/0270w ? rev. 1.0.2 FSBH0F70WA/0170w/0270w ? green mode fairchild power switch (fps?) FSBH0F70WA, fsbh0170w, fsbh0270w green mode fairchild power switch (fps?) features ? brownout protection with hysteresis ? built-in 5ms soft-start function ? internal avalanche-rugged 700v sensefet ? low acoustic noise during light-load operation ? high-voltage startup ? linearly decreasing pwm frequency to 18khz ? peak-current-mode control ? cycle-by-cycle current limiting ? leading-edge blanking (leb) ? synchronized slope compensation ? internal open-loop protection ? v dd under-voltage lockout (uvlo) ? v dd over-voltage protection (ovp) ? internal auto-restart circuit (ovp, otp) ? constant power limit (full ac input range) ? internal otp sensor with hysteresis applications general-purpose switched-mode power supplies and flyback power converters, including: ? auxiliary power supply for pc and server ? smps for vcr, svr, stb, dvd & dvcd player, printer, facsimile, and scanner ? adapter for camcorder description the highly integrated fsbh -series consists of an integrated current-mode pulse width modulator (pwm) and an avalanche-rugged 700v sensefet. it is specifically designed for high-performance offline switched-mode power supplie s (smps) with minimal external components. the integrated pwm controller features include a proprietary green-mode function that provides off-time modulation to linearly decrease the switching frequency at light-load conditions to minimize standby power consumption. to avoid acou stic-noise problems, the minimum pwm frequency is set above 18khz. this green-mode function enables the power supply to meet international power conservation requirements. the pwm controller is manufactured using the bicmos process to further reduce power consumption. the fsbh-series turns off some in ternal circuits to improve power saving when v fb is lower than 1.6v, which allows an operating current of only 2.5ma. the fsbh-series has built-in synchronized slope compensation to achieve stable peak-current-mode control. the proprietary external line compensation ensures constant output pow er limit over a wide ac input voltage range, from 90v ac to 264v ac . the fsbh-series provides many protection functions. in addition to cycle-by-cycle cu rrent limiting, the internal open-loop protection circuit ensures safety when an open-loop or output short occurs. pwm output is disabled until v dd drops below the v th-olp , then the controller starts up again. as long as v dd exceeds 28v, the internal ovp circuit is triggered. compared with a discrete mosfet and controller or rcc switching converter solution, the fsbh-series reduces component count, design size, and weight; while increasing efficiency, productivity, and system reliability. these devices provide a basic platform that is well suited for the design of cost-effective flyback converters, such as in pc auxiliary power supplies.
? 2011 fairchild semiconductor corporation www.fairchildsemi.com FSBH0F70WA/0170w/0270w ? rev. 1.0.2 2 FSBH0F70WA/0170w/0270w ? green mode fairchild power switch (fps?) ordering information part number sensefet vin pin (pin #4) operating temperature range package packing method FSBH0F70WAny 0.5a 700v not available -40c to +105c 8-pin, dual in-line package (dip) tube fsbh0170wny 1.0a 700v enabled fsbh0270wny 2.0a 700v typical application diagram hv drain gnd vdd fb vin figure 1. typical flyback application table 1. output power table (1) product 230v ac 15% (2) 85-265v ac adapter (3) open frame (4) adapter (3) open frame (4) FSBH0F70WA 7w 10w 6w 8w fsbh0170w 10w 15w 9w 13w fsbh0270w 14w 20w 11w 16w notes: 1. the maximum output power can be li mited by junction temperature. 2. 230 v ac or 100/115 v ac with doublers. 3. typical continuous power in a non-v entilated enclosed adapter with sufficien t drain pattern as a heat sink at 50 c ambient. 4. maximum practical continuous power in an open-frame des ign with sufficient drain pattern as a heat sink at 50 c ambient.
? 2011 fairchild semiconductor corporation www.fairchildsemi.com FSBH0F70WA/0170w/0270w ? rev. 1.0.2 3 FSBH0F70WA/0170w/0270w ? green mode fairchild power switch (fps?) block diagram fb gnd vdd vin 4 hv startup 6v soft driver q s r 12v/8v uvlo green mode olp delay 2 5 6,7,8 3 1 4.6v hv olp 3r olp comparator pwm comparator internal bias soft-start v limit slope compensation r current-limit comparator soft-start comparator olp drain v limit high/low line compensation ovp otp z fb ? osc pattern generator pwm auto-restart protection ovp debounce v dd-ovp 1.13v/0.59v v reset max. duty v reset v pwm v pwm figure 2. fsbh0170w/0270w internal block diagram fb gnd vdd nc 4 hv startup 6v soft driver q s r 12v/8v uvlo green mode olp delay 2 5 6,7,8 3 1 4.6v hv olp 3r olp comparator pwm comparator internal bias soft-start v limit slope compensation r current-limit comparator soft-start comparator olp drain ovp otp z fb ? osc pattern generator pwm auto-restart protection ovp debounce v dd-ovp v reset max. duty v reset v pwm v pwm figure 3. FSBH0F70WA internal block diagram
? 2011 fairchild semiconductor corporation www.fairchildsemi.com FSBH0F70WA/0170w/0270w ? rev. 1.0.2 4 FSBH0F70WA/0170w/0270w ? green mode fairchild power switch (fps?) pin configuration figure 4. pin configuration and top mark information pin definitions pin # name description 1 gnd ground . sensefet source terminal on primary side and internal controller ground. 2 vdd power supply . the internal protection circuit disables pwm output as long as v dd exceeds the ovp trigger point. 3 fb feedback . the signal from the external compensation ci rcuit is fed into this pin. the pwm duty cycle is determined in response to the signal on this pin and the internal current-sense signal. 4 vin line-voltage detection . the line-voltage detection is us ed for brownout protection with hysteresis and constant output power lim it over universal ac input range. nc no connection for FSBH0F70WA 5 hv startup . for startup, this pin is pulled high to t he line input or bulk capacitor via resistors. 6 drain sensefet drain . high-voltage power sensefet drain connection. 7 drain sensefet drain . high-voltage power sensefet drain connection. 8 drain sensefet drain . high-voltage power sensefet drain connection. f ? fairchild logo z ? plant code x ? 1-digit year code y ? 1-digit week code tt ? 2-digit die-run code t ? package type (n:dip) p ? y: green package m ? manufacture flow code
? 2011 fairchild semiconductor corporation www.fairchildsemi.com FSBH0F70WA/0170w/0270w ? rev. 1.0.2 5 FSBH0F70WA/0170w/0270w ? green mo de fairchild power switch (fps?) absolute maximum ratings stresses exceeding the absolute maximum ratings may dam age the device. the device may not function or be operable above the recommended operating conditions and stressi ng the parts to these levels is not recommended. in addition, extended exposure to stresses above the recomm ended operating conditions may affect device reliability. the absolute maximum ratings are stress ratings only. symbol parameter min. max. unit v drain drain pin voltage (5,6) FSBH0F70WA 700 v fsbh0170w fsbh0270w i dm drain current pulsed (7) FSBH0F70WA 1.5 a fsbh0170w 4.0 fsbh0270w 8.0 e as single pulsed avalanche energy (8) FSBH0F70WA 10 mj fsbh0170w 50 fsbh0270w 140 v dd dc supply voltage 30 v v fb fb pin input voltage -0.3 7.0 v v in vin pin input voltage -0.3 7.0 v v hv hv pin input voltage 700 v p d power dissipation (t a 50c) 1.5 w ja junction-to-air thermal resistance 80 c/w jt junction-to-top thermal resistance (9) 20 c/w t j operating junction temper ature internally limited (10) c t stg storage temperature range -55 +150 c t l lead temperature (wave soldering or ir, 10 seconds) +260 c esd human body model (all pins except hv pn): jesd22-a114 FSBH0F70WA 5.0 kv fsbh0170w 5.0 fsbh0270w 5.0 charged device model (all pins except hv pin): jesd22-c101 FSBH0F70WA 2.0 fsbh0170w 2.0 fsbh0270w 2.0 notes : 5. all voltage values, except differential voltages, ar e given with respect to the network ground terminal. 6. stresses beyond those listed under absolute maximu m ratings may cause permanent damage to the device. 7. non-repetitive rating: pulse width is limited by maximum junction temperature. 8. l = 51mh, starting t j = 25 c. 9. measured on the package top surface. 10. internally limited of t j refers to t otp recommended operating conditions the recommended operating conditions table defines t he conditions for actual device operation. recommended operating conditions are specified to ens ure optimal performance to the datasheet specifications. fairchild does not recommend exceeding them or designing to absolute maximum ratings. symbol parameter min. max. unit t a operating ambient tem perature -40 +105 c
? 2011 fairchild semiconductor corporation www.fairchildsemi.com FSBH0F70WA/0170w/0270w ? rev. 1.0.2 6 FSBH0F70WA/0170w/0270w ? green mode fairchild power switch (fps?) electrical characteristics v dd =15v and t a =25 c unless otherwise specified. symbol parameter condition min. typ. max. unit sensefet section bv dss drain-source breakdown voltage v ds =700v, v gs =0v 700 v i dss zero-gate-voltage drain current v ds =700v, v gs =0v 50 a v ds =560v, v gs =0v, t c =125 c 200 r ds(on) drain-source on- state resistance (12) v gs =10v, i d =0.5a FSBH0F70WA 14.00 19.00 ? fsbh0170w 8.80 11.00 fsbh0270w 6.00 7.20 c iss input capacitance v gs =0v, v ds =25v, f=1mhz FSBH0F70WA 162 211 pf fsbh0170w 250 325 fsbh0270w 550 715 c oss output capacitance v gs =0v, v ds =25v, f=1mhz FSBH0F70WA 18 24 pf fsbh0170w 25 33 fsbh0270w 38 50 c rss reverse transfer capacitance v gs =0v, v ds =25v, f=1mhz FSBH0F70WA 3.8 5.7 pf fsbh0170w 10 15 fsbh0270w 17 26 t d(on) turn-on delay v ds =350v, i d =1.0a FSBH0F70WA 9.5 29.0 ns fsbh0170w 12.0 34.0 fsbh0270w 20.0 50.0 t r rise time v ds =350v, i d =1.0a FSBH0F70WA 19 48 ns fsbh0170w 4 18 fsbh0270w 15 40 t d(off) turn-off delay v ds =350v, i d =1.0a FSBH0F70WA 33.0 76.0 ns fsbh0170w 30.0 70.0 fsbh0270w 55.0 120.0 t f fall time v ds =350v, i d =1.0a FSBH0F70WA 42 94 ns fsbh0170w 10 30 fsbh0270w 25 60 continued on the following page?
? 2011 fairchild semiconductor corporation www.fairchildsemi.com FSBH0F70WA/0170w/0270w ? rev. 1.0.2 7 FSBH0F70WA/0170w/0270w ? green mo de fairchild power switch (fps?) electrical characteristics (continued) v dd =15v and t a =25 c unless otherwise specified. symbol parameter condition min. typ. max. unit control section v dd section v dd-on start threshold voltage 11 12 13 v v dd-off minimum operating voltage 7 8 9 v i dd-st startup current fsbh0170w fsbh0270w v dd-on ? 0.16v 30 a FSBH0F70WA v dd-on ? 0.16v 240 320 400 i dd-op operating supply current v dd =15v, v fb =3v 3.0 3.5 4.0 ma i dd-zdc operating current for v fb ? 2011 fairchild semiconductor corporation www.fairchildsemi.com FSBH0F70WA/0170w/0270w ? rev. 1.0.2 8 FSBH0F70WA/0170w/0270w ? green mode fairchild power switch (fps?) electrical characteristics (continued) v dd =15v and t a =25 c unless otherwise specified. symbol parameter condition min. typ. max. unit v fb-n green-mode entry fb voltage 2.3 2.5 2.7 v v fb-g green-mode ending fb voltage 1.9 2.0 2.1 v v fb-zdc zero duty cycle fb voltage 1.6 v v fb-olp fb open-loop trigger level FSBH0F70WA 5.2 5.4 5.6 v fsbh0x7w 4.4 4.6 4.8 t d-olp fb open-loop protection delay 50 56 59 ms current-sense section (15) i lim peak current limit FSBH0F70WA v in open 0.63 0.73 0.83 a fsbh0170w v in =1.2v 0.70 0.80 0.90 fsbh0270w v in =1.2v 0.90 1.00 1.10 t ss period during soft-start time (11) 4.5 5.0 5.5 ms constant power limit (fsbh0170w & fsbh0270w) v lmt1 threshold voltage 1 for current limit v in =1.2v 0.73 0.80 0.87 v v lmt2 threshold voltage 2 for current limit v in =3.6v 0.56 0.63 0.70 v constant power limit (FSBH0F70WA) v lmt threshold voltage for current limit 0.97 1.00 1.03 v over-temperature protection section (otp) t otp protection junction temperature (11,13) +135 +142 +150 c t restart restart junction temperature (11,14) t otp -25 c notes: 11. these parameters, although guaranteed , are not 100% tested in production. 12. pulse test: pulse width 300s, duty 2%. 13. when activated, the output is disabled and the latch is turned off. 14. the threshold temperature for enablin g the output again and resetting the la tch after over-temperature protection has been activated. 15. these parameters, although guaran teed, are tested in wafer process. figure 5. v fb vs. pwm frequency
? 2011 fairchild semiconductor corporation www.fairchildsemi.com FSBH0F70WA/0170w/0270w ? rev. 1.0.2 9 FSBH0F70WA/0170w/0270w ? green mode fairchild power switch (fps?) typical characteristics (continued) 0 2 4 6 8 10 12 14 -40 -25 -10 5 20 35 50 65 80 95 110 125 temperature(c) i dd-st (a) 2.86 2.88 2.90 2.92 2.94 2.96 2.98 3.00 3.02 -40 -25 -10 5 20 35 50 65 80 95 110 125 temperature(c) i dd-op ( a ) figure 6. i dd-st vs. temperature figure 7. i dd-op vs. temperature 11.2 11.4 11.6 11.8 12.0 12.2 12.4 -40 -25 -10 5 20 35 50 65 80 95 110 125 temperature(c) v dd-on (v ) 7.7 7.8 7.9 8.0 8.1 8.2 8.3 -40 -25 -10 5 20 35 50 65 80 95 110 125 temperature(c) v dd-off (v ) figure 8. v dd-on vs. temperature figure 9. v dd-off vs. temperature 5.0 5.2 5.4 5.6 5.8 6.0 6.2 6.4 6.6 -40 -25 -10 5 20 35 50 65 80 95 110 125 temperature(c) v th-olp (v) 28.35 28.36 28.37 28.38 28.39 28.40 28.41 28.42 -40 -25 -10 5 20 35 50 65 80 95 110 125 temperature(c) v dd-ovp (v ) figure 10. v th-olp vs. temperature figure 11. v dd-ovp vs. temperature 1.0 1.5 2.0 2.5 3.0 3.5 4.0 -40 -25 -10 5 20 35 50 65 80 95 110 125 temperature(c) i hv (ma) 0 1 2 3 4 5 6 7 -40 -25 -10 5 20 35 50 65 80 95 110 125 temperature(c) i hv-lc (a) figure 12. i hv vs. temperature figure 13. i hv-lc vs. temperature
? 2011 fairchild semiconductor corporation www.fairchildsemi.com FSBH0F70WA/0170w/0270w ? rev. 1.0.2 10 FSBH0F70WA/0170w/0270w ? green mo de fairchild power switch (fps?) typical characteristics (continued) 97.5 98.0 98.5 99.0 99.5 100.0 100.5 101.0 101.5 -40 -25 -10 5 20 35 50 65 80 95 110 125 temperature(c) f osc (khz) 18.6 18.7 18.8 18.9 19.0 19.1 19.2 -40 -25 -10 5 20 35 50 65 80 95 110 125 temperature(c) f osc-g (khz) figure 14. f osc vs. temperature figure 15. f osc-g vs. temperature 0.58 0.59 0.60 0.61 0.62 0.63 0.64 -40 -25 -10 5 20 35 50 65 80 95 110 125 temperature(c) v in-off (v) 1.11 1.12 1.13 1.14 1.15 1.16 1.17 -40 -25 -10 5 20 35 50 65 80 95 110 125 temperature(c) v in-on (v) figure 16. v in-off vs. temperature figure 17. v in-on vs. temperature 2.42 2.44 2.46 2.48 2.50 2.52 2.54 2.56 -40 -25 -10 5 20 35 50 65 80 95 110 125 temperature(c) i dd-zdc (m a ) 2.30 2.35 2.40 2.45 2.50 2.55 2.60 -40 -25 -10 5 20 35 50 65 80 95 110 125 temperature(c) v fb-n (v) figure 18. i dd-zdc vs. temperature figure 19. v fb-n vs. temperature 1.80 1.85 1.90 1.95 2.00 2.05 2.10 2.15 2.20 -40 -25 -10 5 20 35 50 65 80 95 110 125 temperature(c) v fb-g (v) 1.200 1.300 1.400 1.500 1.600 1.700 1.800 -40 -25 -10 5 20 35 50 65 80 95 110 125 temperature(c) v fb-zdc (v ) figure 20. v fb-g vs. temperature figure 21. v fb-zdc vs. temperature
? 2011 fairchild semiconductor corporation www.fairchildsemi.com FSBH0F70WA/0170w/0270w ? rev. 1.0.2 11 FSBH0F70WA/0170w/0270w ? green mo de fairchild power switch (fps?) functional description startup operation the hv pin is connected to bulk voltage through an external resistor, r hv , as shown in figure 22. when ac voltage is applied to the power system, an internal hv startup circuit provides a high current (around 3.5ma) to charge an external v dd capacitor until v dd voltage exceeds the turn-on threshold voltage (v dd-on ). for lower power consumption, the hv startup circuit shuts down during normal operation. the external v dd capacitor and auxiliary winding maintain the v dd voltage and provide operating current to controller. figure 22. startup circuit slope compensation the fsbh-series is designed for flyback power converters. the peak-current-mode control is used to optimize system performanc e. slope compensation is added to reduce current loop gain and improve power system stability. the fsbh-series has a built-in, synchronized, positive slope for each switching cycle. soft-start the fsbh-series has an internal soft-start circuit that reduces the sensefet switching current during power system startup. the characte ristic curve of soft-start time versus v lmt level is shown in figure 1. the v lmt level rises in six steps. by doing so, the power system can smoothly build up the rated output voltage and effectively reduce voltage stress on the pwm switch and output diode. figure 23. soft-start function brown-in/out function fsbh0170w/0270w has a built-in internal brown-in/out protection comparator monito ring voltage of the vin pin. figure 24 shows a resistive divider with low-pass filtering for line-voltage detection on the vin pin. figure 24. brown-in/out function on vin pin once the vin pin voltage is lower than 0.6v and lasts for 500ms, the pwm gate is disabled to protect the system from over current. fsbh0170w/0270w starts up as v in increases above 1.1v. because the divider resistors of the vin pin are connected behind the bridge, the ratio calculations for brownout in pfc and non-pfc system are different, as shown in figure 1. the formulas are provided in the following equations : brownout with pfc: _ 2 20.6 c ac out abc r v rrr ??= ++ (1) brownout with non-pfc: _ 20.6 c ac out abc r v rrr ?= ++ (2) brown-in level is determined by: _ 1.1 2 a bc ac in c rrr v r ++ =? (3) figure 25. v in level according to pfc operation brown-in function of FSBH0F70WA the vin pin functions are disabled from FSBH0F70WA which still exist brown-in prot ection in vdd pin. there is a discharge current internal from v dd to ground during startup. the hv source cu rrent must be larger than i dd- st to charge the capacitor of v dd . the brown-in level can be determined by r hv according to the equation: 212 ac hv dd st v r i ? ? = (4)
? 2011 fairchild semiconductor corporation www.fairchildsemi.com FSBH0F70WA/0170w/0270w ? rev. 1.0.2 12 FSBH0F70WA/0170w/0270w ? green mo de fairchild power switch (fps?) green-mode operation the fsbh-series uses feedback voltage (v fb ) as an indicator of the output load and modulates the pwm frequency, as shown in figure 26, such that the switching frequency decreases as load decreases. in heavy-load conditions, the switching frequency is 100khz. once v fb decreases below v fb-n (2.5v), the pwm frequency starts to linearly decrease from 100khz to 18khz to reduce switching losses. as v fb decreases below v fb-g (2.0v), the switching frequency is fixed at 18khz and the fsbh-series enters ?deep? green mode to reduce the standby power consumption. figure 26. pwm frequency as v fb decreases below v fb-zdc (1.6v), the fsbh- series enters burst-mode operation. when v fb drops below v fb-zdc , fsbh-series stops switching and the output voltage starts to drop, which causes the feedback voltage to rise. once v fb rises above v fb-zdc , switching resumes. burst mode alternately enables and disables switching, thereby reducing switching loss to improve power saving, as shown in figure 1. figure 27. burst-mode operation h/l line over-power compensation to limit the output power of the converter constantly, high/low line over-power compensation is included. sensing the converter input vo ltage through the vin pin, the high/low line compensation function generates a relative peak-current-limit th reshold voltage for constant power control, as shown in figure 28. figure 28. constant power control protections the fsbh-series provides full protection functions to prevent the power supply and the load from being damaged. the protection features include: open-loop / overload protection (olp) when the upper branch of the voltage divider for the shunt regulator (ka431 shown) is broken, as shown in figure 29, or over current or output short occurs, there is no current flowing through the opto-coupler transistor, which pulls the feedback voltage up to 6v. when feedback voltage is above 4.6v for longer than 56ms, olp is triggered. this protection is also triggered when the smps output drops below the nominal value longer than 56ms due to the overload condition. v dd over-voltage protection (ovp) v dd over-voltage protection prevents ic damage caused by over voltage on the vdd pin. the ovp is triggered when v dd voltage reaches 28v. debounce time (typically 130s) prevents false trigger by switching noise. over-temperature protection (otp) the sensefet and the cont rol ic are integrated, making it easier to detec t the temperature of the sensefet. as the temperature exceeds approximately 142 c, thermal shutdown is activated. figure 29. olp operation
? 2011 fairchild semiconductor corporation www.fairchildsemi.com FSBH0F70WA/0170w/0270w ? rev. 1.0.2 13 FSBH0F70WA/0170w/0270w ? green mode fairchild power switch (fps?) physical dimensions 85 4 1 notes: a) this package conforms to jedec ms-001 variation ba b) controling dims are in inches c) dimensions are exclusive of burrs, mold flash, and tie bar extrusions. d) dimensions and tolerances per asme y14.5m -1982 e) drawing filename and revsion: mkt-n08mrev1. 0.400 0.355 [ 10.160 9.017 ] 0.280 0.240 [ 7.112 6.096 ] 0.195 0.115 [ 4.965 2.933 ] min 0.015 [0.381] max 0.210 [5.334] 0.100 [2.540] 0.070 0.045 [ 1.778 1.143 ] 0.022 0.014 [ 0.562 0.358 ] 0.150 0.115 [ 3.811 2.922 ] c 0.015 [0.389] gage plane 0.325 0.300 [ 8.263 7.628 ] 0.300 [7.618] 0.430 [10.922] max 0.045 0.030 [ 1.144 0.763 ] 4x 4x 0.005 [0.126] min full lead 4x 0.005 [0.126] half lead 4x 0.10 c seating plane pin 1 indicator figure 30. 8-pin dual in-line package (dip) package drawings are provided as a service to customers consi dering fairchild components. drawings may change in any manner without notice. please note the revision and/or date on the drawi ng and contact a fairchild semiconductor representative to ver ify or obtain the most recent revision. package specifications do not expand the terms of fairchild?s worldwide terms and conditions, specifically the warranty therein, which covers fairchild products. always visit fairchild semiconductor?s online packagi ng area for the most recent package drawings: http://www.fairchildsemi.com/packaging/ .
? 2011 fairchild semiconductor corporation www.fairchildsemi.com FSBH0F70WA/0170w/0270w ? rev. 1.0.2 14 FSBH0F70WA/0170w/0270w ? green mo de fairchild power switch (fps?)

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