View BA6950FS_2939789.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

1/10 www.rohm.com 2011.05 - rev.c ? 2011 rohm co., ltd. all rights reserved. reversible motor driv ers for brush motors 0.5a or less reversible motor driver (single motor) BA6950FS 0.8a reversible motor driver (single motor) ba6951fs description these drivers are reversible motor drivers that can directly drive brush motor which require forward and reverse rotations. four modes of output setting are available by the use of input logic (2 inputs) ; forward, reverse, stop (idling), and braking. in addition, since voltage applied to motors varies in accord with the control terminal, motor rotating speed can be optionally set and by the built-in current feedback amplifier, the motor can be driven at a constant speed. features 1) four-mode outputs of forward, reverse, stop (idling), and braking are enabled in compliance with two inputs 2) motors can be driven at a constant speed by a current feedback amplifier 3) built-in thermal shutdown circuit 4) built-in current limit ing function (ba6951fs) applications audio-visual equipment; pc peripherals; car audios; car navigation systems; oa equipments absolute maximum ratings (ta=25 , all voltages are with respect to ground) parameter symbol ratings unit BA6950FS ba6951fs supply voltage vcc 8 v supply voltage vb 18 v output current i omax 0.4* 1 0.8* 1 a operating temperature t opr -20 ~ 75 storage temperature t stg -55 ~ 150 power dissipation pd 0.813* 2 w junction temperature t jmax 150 *1 do not, exceed pd or aso. *2 ssop-a16 package. mounted on a 70mm x 70mm x 1.6mm fr4 glass-epoxy board with less than 3% copper foil. derated at 6.4mw/ above 25 . operating conditions (ta=25 ) parameter symbol ratings unit supply voltage vcc 3 ~ 6 v supply voltage vb 3 ~ 16 v vtcl voltage v ctl 0 ~ (vcc-1.8) v no.11008ect01
technical note 2/10 BA6950FS, ba6951fs www.rohm.com 2011.05 - rev.c ? 2011 rohm co., ltd. all rights reserved. electrical characteristics (BA6950FS, unless otherwise specified, ta=25 and vcc=4.8v, vb=4.8v) parameter symbol limits unit conditions min. typ. max. supply current 1 i cc1 - 4.0 6.0 ma fwd/rev mode, vctl=0v supply current 2 i cc2 - 0.7 1.5 ma standby mode, vctl=0v supply current 3 i boff - 0 1 a vcc=0v input threshold voltage h v r/f h 2.0 - vcc v input threshold voltage l v r/f l 0 - 0.8 v input bias current i r/f h - 80 135 a fin=2v, rin=2v ctl amplifier offset voltage v ctlofs -5 0 5 mv vctl-rc, vctl=0v, 1v ctl amplifier gain v ctlga 40 46 52 a/v i rt1 , vctl=2v, 1v ctl output mirror ratio 1 i ctlr1 0.85 1.00 1.15 ratio i rt1 /i rc , i rc =20a ctl output mirror ratio 2 i ctlr2 0.90 1.00 1.10 ratio i rt1 /i rc , i rc =200a cs amplifier offset voltage cs ofs -5 0 5 mv cs1-cs2, cs1=0v, 0.1v cs output mirror ratio 1 i csr1 0.85 1.00 1.15 ratio i rt2 /i cs2 , i cs =20a cs output mirror ratio 2 i csr2 0.90 1.00 1.10 ratio i rt2 /i cs2 , i cs =200a output high voltage v h 2.0 4.6 - v m1, m2, vctl=0.2v output saturation voltage h v oh - 0.09 0.3 v i o =50ma, rt1=vcc output saturation voltage l v ol - 0.07 0.2 v i o =50ma, rt1=vcc electrical characteristics (ba6951fs, unless otherwise specified, ta=25 and vcc=4.8v, vb=4.8v) parameter symbol limits unit conditions min. typ. max. supply current 1 i cc1 - 4.0 6.0 ma fwd/rev mode, vctl=0v supply current 2 i cc2 - 0.7 1.5 ma standby mode, vctl=0v supply current 3 i boff - 0 1 a vcc=0v input threshold voltage h v r/f h 2.0 - vcc v input threshold voltage l v r/f l 0 - 0.8 v input bias current i r/f h - 80 135 a fin=2v, rin=2v ctl amplifier offset voltage v ctlofs -5 0 5 mv vctl-rc, vctl=0v, 1v ctl amplifier gain v ctlga 40 46 52 a/v i rt1 , vctl=2v, 1v ctl output mirror ratio 1 i ctlr1 0.85 1.00 1.15 ratio i rt1 /i rc , i rc =20a ctl output mirror ratio 2 i ctlr2 0.90 1.00 1.10 ratio i rt1 /i rc , i rc =200a cs amplifier offset voltage cs ofs -5 0 5 mv atc-cs, atc=0v, 0.1v cs output mirror ratio 1 i csr1 0.85 1.00 1.15 ratio i rt2 /i cs , i cs =20a cs output mirror ratio 2 i csr2 0.90 1.00 1.10 ratio i rt2 /i cs , i cs =200a tl-r aofs offset voltage tl-r aofs 6 18 30 mv tl=0.3v, r atc =1.0 ? output high voltage v h 1.85 2.20 2.55 v m1, m2, vctl=1.0v output saturation voltage h v oh - 0.28 0.56 v i o =300ma, rt1=vcc output saturation voltage l v ol - 0.32 0.64 v i o =300ma, rt1=vcc
technical note 3/10 BA6950FS, ba6951fs www.rohm.com 2011.05 - rev.c ? 2011 rohm co., ltd. all rights reserved. electrical characteristic curves (reference data) fig.1 supply current 1 (forward) fig.2 supp ly current 2 (standby) fig.3 supply current 3 (BA6950FS) (BA6950FS) fig.4 supply current 1 (forward) fig.5 supply current 2 (standby) fig.6 input bias current (ba6951fs) (ba6951fs) fig.7 output saturation voltage h fig.8 output saturation voltage l fig.9 input threshold voltage (BA6950FS) (BA6950FS) fig.10 output saturation voltage h fig.11 out put saturation voltage l fig.12 thermal derating curve (ba6951fs) (ba695 1fs) (ssop-a16) 4.0 4.2 4.4 4.6 4.8 5.0 0 0.2 0.4 0.6 0.8 output current: iout [a] output high voltage: voh [v] _ -20c 25c 75c 0.0 0.2 0.4 0.6 0.8 1.0 0 0.2 0.4 0.6 0.8 output current: iout [a] output low voltage: vol [v] _ 75c 25c - 25c 0.0 0.5 1.0 1.5 0 25 50 75 100 125 150 ambient temperature [c] pd [w] ii) 0.813w ii) mounted on rohm standard pcb (70mm x 70mm x 1.6mm fr4 glass-epoxy board) i) package only i) 0.625w 1 2 3 4 5 34 56 supply voltag e: vcc [v] supply current: icc1 [ma] _ - 20c 25c 75c 0.0 0.1 0.2 0.3 0.4 34 56 supply voltag e: vb [v] circuit current: icc3 [a] _ -20c 25c 75c 0.4 0.5 0.6 0.7 0.8 0.9 34 56 supply voltag e: vcc [v] circuit current: icc2 [ma] _ -20c 25c 75c 0 100 200 300 400 012345 input voltage: vr/f [v] input bias current: ir/f h [a] _ - 25c 25c 75c 1 2 3 4 5 34 56 supply voltag e: vcc [v] supply current: icc1 [ma] _ - 20c 25c 75c 0.4 0.5 0.6 0.7 0.8 0.9 34 56 supply voltag e: vcc [v] circuit current: icc2 [ma] _ -20c 25c 75c 4.0 4.2 4.4 4.6 4.8 5.0 0 0.1 0.2 0.3 0.4 output current: iout [a] output high voltage: voh [v] _ -20c 25c 75c 0.0 0.2 0.4 0.6 0.8 1.0 0 0.1 0.2 0.3 0.4 output current: iout [a] output low voltage: vol [v] _ 75c 25c - 25c 0.0 1.0 2.0 3.0 4.0 5.0 01234 input voltag e: vr/f [v] output high voltage: voh [v] _ 75c 25c -25c
technical note 4/10 BA6950FS, ba6951fs www.rohm.com 2011.05 - rev.c ? 2011 rohm co., ltd. all rights reserved. block diagram and pin configuration BA6950FS fig.13 BA6950FS table 1 BA6950FS pin name function 1 gnd gnd 2 vctl control input 3 rc control gain setting 4 pct ctl amp phase compensation 5 rin control input (reverse) 6 vb power supply (driver stage) 7 m1 driver output 8 atc current sense pin 9 m2 driver output 10 fin control input (forward) 11 pc phase compensation 12 vcc power supply (small signal) 13 cs1 cs amp gain setting 14 cs2 cs amp gain setting 15 rt2 ctl amp gain setting 16 rt1 ctl amp gain setting 6 10 5 ctrl fin rin vb tsd 7 9 m2 m1 m 3 2 vctl 4 r1 c1 1 gnd 14 r4 8 15 16 rt2 rt1 cs2 pct rc 13 cs1 r2 r3 11 c2 pc 12 vcc vcc ctrl amp cs amp pre driver atc x4 r5 c3 c5 c6 c4 gnd vctl rc pct rin vb m1 atc rt1 rt2 cs2 cs1 vcc pc fin m2 fig.14 BA6950FS (ssop-a16)
technical note 5/10 BA6950FS, ba6951fs www.rohm.com 2011.05 - rev.c ? 2011 rohm co., ltd. all rights reserved. block diagram and pin configuration ba6951fs fig.15 ba6951fs table 2 ba6951fs pin name function 1 gnd gnd 2 vctl control input 3 rc control gain setting 4 pct ctl amp phase compensation 5 rin control input (reverse) 6 vb power supply (driver stage) 7 m1 driver output 8 atc current sense pin 9 m2 driver output 10 fin control input (forward) 11 pc phase compensation 12 vcc power supply (small signal) 13 tl torque limiter setting 14 cs cs amp gain setting 15 rt2 ctl amp gain setting 16 rt1 ctl amp gain setting 6 10 5 ctrl fin rin vb tsd 7 9 m2 m1 m 3 2 vctl 4 r1 c1 1 gnd 14 r4 8 15 16 rt2 rt1 cs pct rc 13 tl r2 r3 11 c2 pc 12 vcc vcc ctrl amp cs amp tl amp pre driver atc x4 r5 c3 c5 c6 c4 gnd vctl rc pc t rin vb m1 atc rt1 rt2 cs tl vcc pc fin m2 fig.16 ba6951fs (ssop-a16)
technical note 6/10 BA6950FS, ba6951fs www.rohm.com 2011.05 - rev.c ? 2011 rohm co., ltd. all rights reserved. external application components 1) resistor for the current sensing, r5 this is a current sensing resistor, care must be taken to avoid changes in the ground wire pattern in any external connected component. 2) control amplifier gain setting resistor, r1 vctl pin voltage is buffered to rc pin, and the control gain - v ctlga - can be set by connecting r1. the current decided here is output to rt1 pin. 3) control amplifier phase compensation capacitor, c1 this phase compensation capacitor for the control amplifie r. please monitor the rt1 pin voltage and confirm no oscillation. about 33pf is recommended. 4) current feedback amplifier gain setting resistor, r4 cs1 pin voltage (the motor current detecti on) is buffered to cs2 pin - BA6950FS. atc pin voltage (the motor current detection) is buffered to cs pin - ba6951fs. the current feedback gain can be set by r4 connecting to cs2 or cs pin. the current decided here is output to rt2 pin. 5) pre-amplifier gain setting resistor, r2, r3 these resistors are to add the control am plifier output and the current feedback amplifier output. this amplifier has about fourfold gain. 6) pre-amplifier phase compensation capacitor, c2 please connect the capacitor about 0.1f as the phase compen sation of the pre-amplifier, and monitor the driver output no oscillation. 7) stabilization capacitor for the power supply line, c5, c6 please connect the capacitor of 1 f to 100 f for the stabilization of the power supply line, and confirm the motor operation. 8) phase compensating capacitor, c3, c4 noise is generated in output pins or oscillation results in accord with the set mounting state such as power supply circuit, motor characteristics, pcb pattern artwork, etc. as noise oscillation measures, connect 0.01 f to 0.1 f capacitors. 9) torque limiter setting, tl pin, ba6951fs only the motor current is limited so that atc pin voltage should not exceed tl pin voltage. functional descriptions table 3 logic table fin rin m1 m2 operation l l open* open* stop (idling) h l l h forward (m2 > m1) l h h l reverse (m1 > m2) h h l l brake (stop) * open is the off state of all output transistors. please note that this is the state of the connected diodes, which differs fr om that of the mechanical relay.
technical note 7/10 BA6950FS, ba6951fs www.rohm.com 2011.05 - rev.c ? 2011 rohm co., ltd. all rights reserved. external application components setting procedure the relation between vctl and the output high voltage is as follows. i rt1 = vctl / r1 (1) vctl: torque control voltage i rt2 = i act x r5 / r4 (2) i act : motor current v rt1 = r3 x ( i rt1 + i rt2 ) + r2 x i rt1 (3) v mx = 4 x v rt1 (4) v m1 , v m2 : output high voltage v mx = 4 ( r2 + r3 ) x vtcl + 4 r3 r5 x i act (5) r1 r4 to drive the motor by constant speed as follows. r l + r on + r5 = 4 r3 r5 (6) r l : motor coil impedance r4 r on : on resistance of the driver ic r3, r4, and r5 are first set, and then r1 and r2 are set afterwards. table 4 external components parts default value parameter recommended condition r1 22k ? i rt1 i rt1 < 1ma r2 + r3 1k ? + 1.5k ? v rt1 v rt1 x 4 < vb r4 560 ? i rt2 i rt2 < 1ma r5 5.5 ? v atc v atc < 1v c1 33pf v pct please confirm the motor operation c2 0.1f v pc c3, c4 0.1f v m1 , v m2 c5, c6 1~100f vcc, vb interfaces fig. 17 fin, rin fig.18 vctl, rc, pct fig.19 pc fig. 20 rt1, rt2 fig.21 cs1, cs2 fig.22 cs, tl fig.23 vb, act, m1,m2 (BA6950FS) (ba6951fs) fin :w rin :w 24k :w 3.6k :w 10k :w 13.5k :w 10k :w 10k :w vctl :w pct :w rc :w 1k :w 1k :w 20k :w pc :w 1k :w m2 :w m1 :w vb :w act rt1 :w 1k :w rt2 :w cs1 :w cs2 :w 1k :w 1k :w 1k :w cs :w 1k :w tl :w
technical note 8/10 BA6950FS, ba6951fs www.rohm.com 2011.05 - rev.c ? 2011 rohm co., ltd. all rights reserved. notes for use 1) absolute maximum ratings devices may be destroyed when supply voltage or operating temperature exceeds the absolute maximum rating. because the cause of this damage cannot be identified as, for example, a short circuit or an open circuit, it is important to consider circuit protection measures ? such as adding fu ses ? if any value in excess of absolute maximum ratings is to be implemented. 2) connecting the power supply connector backward connecting the power supply in reverse polarity can damage the ic. take precautions against reverse polarity when connecting the power supply lines, such as adding an external direction diode. 3) power supply lines return current generated by the motor?s back-emf requires countermeasures, such as providing a return current path by inserting capacitors across the power supply and gnd ( 10f, ceramic capacitor is recommended). in this case, it is important to conclusively confirm that none of the negative effects sometimes seen with electrolytic capacitors ? including a capacitance drop at low temperatures - occu rs. also, the connected power supply must have sufficient current absorbing capability. otherwise, the regenerated curr ent will increase voltage on the power supply line, which may in turn cause problems with the product, including peripheral circuits exceeding the absolute maximum rating. to help protect against damage or degradation, physical safety measures should be taken, such as providing a voltage clamping diode across the power supply and gnd. 4) electrical potential at gnd keep the gnd terminal potential to the minimum potential under any operating condition. in addition, check to determine whether there is any terminal that provides voltage below gnd, including the voltage during transient phenomena. when both a small signal gnd and high current gnd are present, single-point grounding (at the set?s reference point) is recommended, in order to separate t he small signal and high current gnd, and to ensure that voltage changes due to the wiring resistance and high current do not affect the voltage at the small signal gnd. in the same way, care must be taken to avoid changes in the gnd wire pattern in any external connected component. 5) thermal design use a thermal design that allows for a sufficient margin in light of the power dissipation (pd) under actual operating conditions. 6) inter-pin shorts and mounting errors use caution when positioning the ic fo r mounting on printed circuit boards. the ic may be damaged if there is any connection error, or if pins are shorted together. 7) operation in strong electromagnetic fields using this product in strong electromagnetic fields may cause ic malfunctions. use extreme caution with electromagnetic fields. 8) aso - area of safety operation when using the ic, set the output transistor so that it does not exceed absolute maximum ratings or aso. 9) built-in thermal shutdown (tsd) circuit the tsd circuit is designed only to shut the ic off to prev ent thermal runaway. it is not designed to protect the ic or guarantee its operation in the pres ence of extreme heat. do not continue to use the ic after the tsd circuit is activated, and do not operate the ic in an environment wh ere activation of the circuit is assumed. 10) capacitor between output and gnd in the event a large capacitor is connected between the output and gnd, if vcc and vin are short-circuited with 0v or gnd for any reason, the current charged in the capacitor fl ows into the output and may destroy the ic. use a capacitor smaller than 0.47 f between output and gnd. 11) testing on application boards when testing the ic on an application board, connecting a capaci tor to a low impedance pin subjects the ic to stress. therefore, always discharge capacitors after each process or step. always turn the ic's power supply off before connecting it to or removing it from t he test setup during the inspection proc ess. ground the ic during assembly steps as an antistatic measure. use similar prec aution when transporting or storing the ic. 12) switching of rotating direction (fwd/rev) when the rotating direction is changed over by the motor rota ting condition, switch the direction after the motor is temporarily brought to the brake condition or open condition. it is recommended to keep the relevant conditions as follows: via brake: longer than braking time*. (* the time required for the output voltage to achieve potential below gnd when brake is activated.) via open: the time longer than 1 ms is recommended.
technical note 9/10 BA6950FS, ba6951fs www.rohm.com 2011.05 - rev.c ? 2011 rohm co., ltd. all rights reserved. 13) regarding the input pin of the ic this monolithic ic contains p+ isolat ion and p substrate layers between adjac ent elements, in order to keep them isolated. p-n junctions are formed at the intersection of these p layers with t he n layers of other elements, creating a parasitic diode or transistor. for example, the relation between each potential is as follows: when gnd > pin a and gnd > pin b, the p-n junction operates as a parasitic diode. when gnd > pin b, the p-n junction operates as a parasitic transistor. parasitic diodes inevitably occur in the structure of the ic. the operation of parasitic diodes can result in mutual interference among circuits, as well as operating malfuncti ons and physical damage. therefor e, do not use methods by which parasitic diodes operate, such as applying a voltage lo wer than the gnd (p substrate) voltage to an input pin. parasitic element appendix: example of monolithic ic structure resistor transistor (npn) n n n p + p + p p substrate gnd parasitic element pin a n n p + p + p p substrate gnd parasitic element pin b c b e n gnd pin a pin b other adjacent elements e b c gnd parasitic element
technical note 10/10 BA6950FS, ba6951fs www.rohm.com 2011.05 - rev.c ? 2011 rohm co., ltd. all rights reserved. ordering part number b a 6 9 5 0 f s - e 2 part no. part no. 6950 6951 package fs: ssop-a16 packaging and forming specification e2: embossed tape and reel ? order quantity needs to be multiple of the minimum quantity. embossed carrier tape tape quantity direction of feed the direction is the 1pin of product is at the upper left when you hold reel on the left hand and you pull out the tape on the right hand 2500pcs e2 () direction of feed reel 1pin (unit : mm) ssop-a16 13 87 0.8 9 0.11 15 45 3 11 0.3min 2 12 16 14 6 1 10 6.6 0.2 0.15 0.1 0.36 0.1 1.5 0.1 6.2 0.3 4.4 0.2 (max 6.95 include burr) 0.1
r1120 a www.rohm.com ? 2011 rohm co., ltd. all rights reserved. notice rohm customer support system http://www.rohm.com/contact/ thank you for your accessing to rohm product informations. more detail product informations and catalogs are available, please contact us. notes no copying or reproduction of this document, in part or in whole, is permitted without the consent of rohm co.,ltd. the content specied herein is subject to change for improvement without notice. the content specied herein is for the purpose of introducing rohm's products (hereinafter "products"). if you wish to use any such product, please be sure to refer to the specications, which can be obtained from rohm upon request. examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the products. the peripheral conditions must be taken into account when designing circuits for mass production. great care was taken in ensuring the accuracy of the information specied in this document. however, should you incur any damage arising from any inaccuracy or misprint of such information, rohm shall bear no responsibility for such damage. the technical information specied herein is intended only to show the typical functions of and examples of application circuits for the produc ts. rohm does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by rohm and other parties. rohm shall bear no responsibility whatsoever for any dispute arising from the use of such technical information. the products specied in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, ofce-automation equipment, commu- nication devices, electronic appliances and amusement devices). the products specied in this document are not designed to be radiation tolerant. while rohm always makes efforts to enhance the quality and reliability of its products, a product may fail or malfunction for a variety of reasons. please be sure to implement in your equipment using the products safety measures to guard against the possibility of physical injury, re or any other damage caused in the event of the failure of any product, such as derating, redundancy, re control and fail-safe designs. rohm shall bear no responsibility whatsoever for your use of any product outside of the prescribed scope or not in accordance with the instruction manual. the products are not designed or manufactured to be used with any equipment, device or system which requires an extremely high level of reliability the failure or malfunction of which may result in a direct threat to human life or create a risk of human injury (such as a medical instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuel- controller or other safety device). rohm shall bear no responsibility in any way for use of any of the products for the above special purposes. if a product is intended to be used for any such special purpose, please contact a rohm sales representative before purchasing. if you intend to export or ship overseas any product or technology specied herein that may be controlled under the foreign exchange and the foreign trade law, you will be required to obtain a license or permit under the law.

▲Up To Search▲

Price & Availability of BA6950FS

	To Download BA6950FS Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .