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1/17 www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. reversible motor driv ers for brush motors 1.0a reversible motor drivers (single motor) BA6956AN,ba6287f,ba6285fs, ba6285afp-y,ba6920fp-y description the reversible motor driver for output 1.0a for 1 motor c an set the output modes to four modes, normal, reverse, stop (idling), and braking in accordance with logic input (2 inputs). features 1) built-in surge absorption diode 2) by built-in power save circuit, current cons umption when a motor stops (idles) can be suppressed 3) output voltage can be optionally set by reference voltage setting pin 4) built-in thermal shutdown circuit (tsd) 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 BA6956AN ba6287f ba6285fs ba6285afp-y ba6920fp-y supply voltage vcc 18 18 18 30 36 v supply voltage vm 18 18 18 30 36 v output current i omax 1* 1 1* 1 1* 1 1* 1 1* 1 a operating temperature t opr -20 ~ 75 -20 ~ 75 -20 ~ 75 -40 ~ 85 -30 ~ 85 storage temperature t stg -55 ~ 150 -55 ~ 150 -55 ~ 150 -55 ~ 150 -55 ~ 150 power dissipation pd 1.19* 2 0.689* 3 0.813* 4 1.45* 5 1.45* 5 w junction temperature t jmax 150 150 150 150 150 *1 do not, exceed pd or aso. *2 sip9 package. derated at 9.5mw/ above 25 . *3 sop8 package. mounted on a 70mm x 70mm x 1.6mm fr4 glass- epoxy board with less than 3% copper foil. derated at 5.52mw/ above 25 . *4 ssop-a16 package. mounted on a 70mm x 70mm x 1.6mm fr4 glas s-epoxy board with less than 3% copper foil. derated at 6.5mw/ above 25 . *5 hsop25 package. mounted on a 70mm x 70mm x 1.6mm fr4 glass-epoxy board with less than 3% copper foil. derated at 11.6mw/ above 25 . operating conditions (ta=25 ) parameter symbol ratings unit BA6956AN ba6287f ba6285fs ba6285afp-y ba6920fp-y supply voltage vcc 6.5 ~ 15 4.5 ~ 15 4.5 ~ 15 4.5 ~ 24 6.5 ~ 34 v supply voltage vm 6.5 ~ 15 4.5 ~ 15 4.5 ~ 15 4.5 ~ 24 6.5 ~ 34 v vref voltage vref < vcc, vm < vcc, vm < vcc, vm < vcc, vm < vcc, vm v no.11008ebt02
technical note 2/17 BA6956AN,ba6287f,ba6285fs, ba6285afp-y,ba6920fp-y www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. electrical characteristics (BA6956AN, unless otherwise specified, ta=25 and vcc=9v, vm=9v) parameter symbol limits unit conditions min. typ. max. supply current 1 i cc1 - 29 44 ma fwd/rev mode supply current 2 i cc2 - 56 80 ma brake mode supply current 3 i cc3 - 0 15 a standby mode input threshold voltage h v ih 2.0 - vcc v input threshold voltage l v il 0 - 0.8 v input bias current i ih 50 90 131 a v in =2v output saturation voltage v ce - 1.7 2.3 v i o =0.2a, vertically total vref bias current i ref - 10 25 a i o =0.2a, vref=6v electrical characteristics (ba6287f, unless otherwise specified, ta=25 and vcc=9v, vm=9v, vref=9v) parameter symbol limits unit conditions min. typ. max. supply current 1 i cc1 12 24 36 ma fwd/rev mode supply current 2 i cc2 29 48 67 ma brake mode standby current i st - 0 15 a standby mode input threshold voltage h v ih 2.0 - vcc v input threshold voltage l v il 0 - 0.8 v input bias current i ih 45 90 135 a v in =2v output saturation voltage v ce - 1.0 1.5 v i o =0.2a, vertically total vref bias current i ref 6 12 18 ma i o =0.2a, fwd or rev mode electrical characteristics (ba6285fs, unless otherwise specified, ta=25 and vcc=9v, vm=9v, vref=9v) parameter symbol limits unit conditions min. typ. max. supply current 1 i cc1 12 24 36 ma fwd/rev mode supply current 2 i cc2 29 48 67 ma brake mode standby current i st - 0 15 a standby mode input threshold voltage h v ih 2.0 - vcc v input threshold voltage l v il 0 - 0.8 v input bias current i ih 45 90 135 a v in =2v power save on voltage v pson 2.0 - vcc v standby mode power save off voltage v psoff 0 - 0.8 v operation output saturation voltage v ce - 1.0 1.5 v i o =0.2a, vertically total vref bias current i ref 6 12 18 ma i o =0.2a, fwd or rev mode
technical note 3/17 BA6956AN,ba6287f,ba6285fs, ba6285afp-y,ba6920fp-y www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. electrical characteristics (ba6285afp-y, unless otherwise specified, ta=25 and vcc=9v, vm=9v, vref=9v) parameter symbol limits unit conditions min. typ. max. supply current 1 i cc1 10 20 30 ma fwd/rev mode supply current 2 i cc2 21 42 63 ma brake mode standby current i st - 0 15 a standby mode input threshold voltage h v ih 2.0 - vcc v input threshold voltage l v il 0 - 0.8 v input bias current i ih 40 80 120 a v in =2v power save on voltage v pson - - 0.8 v operation power save off voltage v psoff 2.0 - vcc v standby mode output saturation voltage v ce - 1.0 1.5 v i o =0.2a, vertically total vref bias current i ref 9 15 21 ma i o =0.2a, fwd or rev mode electrical characteristics (ba6920fp-y, unless otherwise specified, ta=25 and vcc=12v, vm=12v) parameter symbol limits unit conditions min. typ. max. supply current 1 i cc1 5 8 12 ma fwd/rev mode supply current 2 i cc2 3 5 8 ma brake mode standby current i st - 0 15 a standby mode input threshold voltage h v ih 3.0 - vcc v input threshold voltage l v il 0 - 0.8 v input bias current i ih 100 200 300 a v in =3v power save on voltage v pson 2.0 - vcc v standby mode power save off voltage v psoff - - 0.8 v operation output saturation voltage v ce - 2.2 3.3 v i o =0.2a, vertically total vref bias current i ref - 12 35 a i o =0.1a, vref=6v
technical note 4/17 BA6956AN,ba6287f,ba6285fs, ba6285afp-y,ba6920fp-y www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. 7.0 7.5 8.0 8.5 0 0.2 0.4 0.6 0.8 1 output current: iout [a] output high voltage: voh [v] _ 75c 25c -20c 4 6 8 10 12 6 1218243036 supply voltag e: vcc [v] circuit current: icc2 [ma] _ - 30c 25c 85c 7.5 8.0 8.5 9.0 0 0.2 0.4 0.6 0.8 1 output current: iout [a] output high voltage: voh [v] _ 75c 25c -20c 15 20 25 30 35 4 8 12 16 20 24 supply voltag e: vcc [v] circuit current: icc1 [ma] _ - 40c 25c 85c 20 30 40 50 60 70 4 8 12 16 20 24 supply voltag e: vcc [v] circuit current: icc2 [ma] _ - 40c 25c 85c 2 4 6 8 6 1218243036 supply voltag e: vcc [v] circuit current: icc1 [ma] _ - 30c 25c 85c 40 45 50 55 60 6 9 12 15 supply voltag e: vcc [v] supply current: icc2 [ma] _ - 25c 25c 75c 40 45 50 55 60 4 8 12 16 supply voltag e: vcc [v] supply current: icc2 [ma] _ - 20c 25c 75c 20 25 30 35 40 6 9 12 15 supply voltag e: vcc [v] circuit current: icc1 [ma] _ - 20c 25c 75c 20 25 30 35 40 6 9 12 15 supply voltag e: vcc [v] supply current: icc1 [ma] _ -20c 25c 75c 10 15 20 25 30 4 8 12 16 supply voltag e: vcc [v] circuit current: icc1 [ma] _ -20c 25c 75c 40 50 60 70 80 6 9 12 15 supply voltag e: vcc [v] circuit current: icc2 [ma] _ - 20c 25c 75c fig.1 supply current 1 (forward) fig.2 supply current 2 (brake) fig.3 supply current 1 (forward) (BA6956AN) (BA6956AN) (ba6287f) fig.4 supply current 2 (brake) fig.5 supply cu rrent 1 (forward) fig.6 supply current 2 (brake) (ba6287f) (ba6285fs) (ba6285fs) fig.7 supply current 1 (forward) fig.8 supply current 2 (brake) fig.9 supply current 1 (forward) (ba6285afp-y) (ba6285afp-y) (ba6920fp-y) fig.10 supply current 2 (brake) fig.11 ou tput high voltage fig.12 output high voltage (ba6920fp-y) (BA6956AN) (ba6287f) electrical characteristic curves (reference data)
technical note 5/17 BA6956AN,ba6287f,ba6285fs, ba6285afp-y,ba6920fp-y www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. 0.0 0.5 1.0 1.5 0 25 50 75 100 125 150 ambient temperature [c] pd [w] i) 0.563w ii) 0.689w ii) mounted on rohm standard pcb (70mm x 70mm x 1.6mm fr4 glass-epoxy board) i) package only 0 1 2 3 0 25 50 75 100 125 150 ambient temperature [c] pd [w] i)0.85w ii)1.45w ii) mounted on rohm standard pcb (70mm x 70mm x 1.6mm fr4 glass-epoxy board) i) package only 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 0.0 0.2 0.4 0.6 0.8 1.0 0 0.2 0.4 0.6 0.8 1 output current: iout [a] output low voltage: vol [v] _ 85c 25c -40c 0.0 0.3 0.6 0.9 1.2 1.5 0 0.2 0.4 0.6 0.8 1 output current: iout [a] output low voltage: vol [v] _ 85c 25c -30c 0.0 0.5 1.0 1.5 0 25 50 75 100 125 150 ambient temperature [c] pd [w] i) 1.19w i) package only 0.0 0.2 0.4 0.6 0.8 1.0 0 0.2 0.4 0.6 0.8 1 output current: iout [a] output low voltage: vol [v] _ 75c 25c -20c 0.0 0.2 0.4 0.6 0.8 1.0 0 0.2 0.4 0.6 0.8 1 output current: iout [a] output low voltage: vol [v] _ 75c 25c -20c 0.0 0.2 0.4 0.6 0.8 1.0 0 0.2 0.4 0.6 0.8 1 output current: iout [a] output low voltage: vol [v] _ 75c 25c -20c 7.5 8.0 8.5 9.0 0 0.2 0.4 0.6 0.8 1 output current: iout [a] output high voltage: voh [v] _ 75c 25c -20c 7.5 8.0 8.5 9.0 0 0.2 0.4 0.6 0.8 1 output current: iout [a] output high voltage: voh [v] _ 85c 25c -40c 7.0 7.5 8.0 8.5 9.0 0 0.2 0.4 0.6 0.8 1 output current: iout [a] output high voltage: voh [v] _ 85c 25c -30c fig.13 output high voltage fig.14 output high voltage fig.15 output high voltage (ba6285fs) (ba6285afp-y) (ba6920fp-y) fig.16 output low voltage fig.17 output low voltage fig.18 output low voltage (BA6956AN) (ba6287f) (ba6285fs) fig.19 output low voltage fig.20 output low voltage fig.21 thermal derating curve (ba6285afp-y) (ba6920fp-y) (sip9) fig.22 thermal derating curve fig.23 thermal derating curve fig.24 thermal derating curve (sop8) (ssop-a16) (hsop25) electrical characteristic curves (reference data) - continued
technical note 6/17 BA6956AN,ba6287f,ba6285fs, ba6285afp-y,ba6920fp-y www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. block diagram and pin configuration BA6956AN fig.25 BA6956AN table 1 BA6956AN pin name function 1 vref reference voltage setting pin 2 out2 driver output 3 rnf power ground 4 out1 driver output 5 vm power supply (driver stage) 6 vcc power supply (small signal) 7 fin control input (forward) 8 gnd gnd 9 rin control input (reverse) r3 c2 c1 3 6 5 2 4 7 9 1 ctrl tsd fin rin vref vm vcc rnf out1 out2 8 gnd r2 r1 vcc m c3 fig.26 BA6956AN (sip9) vref out2 rnf out1 vm vcc fin gnd rin
technical note 7/17 BA6956AN,ba6287f,ba6285fs, ba6285afp-y,ba6920fp-y www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. block diagram and pin configuration ba6287f fig.27 ba6287f table 2 ba6287f pin name function 1 out1 driver output 2 vm power supply (driver stage) 3 vcc power supply (small signal) 4 fin control input (forward) 5 rin control input (reverse) 6 vref reference voltage setting pin 7 out2 driver output 8 gnd gnd zd c2 c1 vm vcc out1 out2 r2 r1 m c3 3 2 7 1 4 5 ctrl tsd fin rin 6 vref 8 gnd vcc fig.28 ba6287f (sop8) out1 vm vcc fin gnd out2 vref rin
technical note 8/17 BA6956AN,ba6287f,ba6285fs, ba6285afp-y,ba6920fp-y www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. block diagram and pin configuration ba6285fs fig.29 ba6285fs table 3 ba6285fs pin name function 1 gnd gnd 2 nc nc 3 out1 driver output 4 vm power supply (driver stage) 5 vcc power supply (small signal) 6 fin control input (forward) 7 nc nc 8 ps power save enable pin 9 nc nc 10 nc nc 11 rin control input (reverse) 12 vref reference voltage setting pin 13 nc nc 14 out2 driver output 15 nc nc 16 rnf power ground zd c2 c1 r2 r1 m c3 vcc 5 4 14 3 6 11 ctrl tsd fin rin vm vcc out1 out2 12 vref 16 rnf 8 power save 1 gnd fig.30 ba6285fs (ssop-a16) gnd nc out1 vm vcc fin nc ps rnf nc out2 nc vref rin nc nc
technical note 9/17 BA6956AN,ba6287f,ba6285fs, ba6285afp-y,ba6920fp-y www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. block diagram and pin configuration ba6285afp-y fig.31 ba6285afp-y table 4 ba6285afp-y pin name function 1 nc nc 2 nc nc 3 nc nc 4 nc nc 5 out2 driver output 6 rnf power ground 7 gnd gnd 8 gnd gnd 9 out1 driver output 10 nc nc 11 nc nc 12 nc nc 13 nc nc 14 nc nc 15 nc nc 16 vm power supply (driver stage) 17 vcc power supply (small signal) 18 fin control input (forward) 19 ps power save enable pin 20 rin control input (reverse) 21 vref reference voltage setting pin 22 nc nc 23 nc nc 24 nc nc 25 nc nc fin gnd gnd zd c2 c1 r2 r1 m c3 vcc 17 16 5 9 18 20 ctrl tsd fin rin vm vcc out1 out2 21 vref 6 rnf 19 power save 7 8 fin gnd gnd fig.32 ba6285afp-y (hsop25) nc nc gnd nc nc out2 rnf gnd gnd out1 nc nc nc nc nc nc gnd nc nc vref rin ps fin vcc vm nc nc
technical note 10/17 BA6956AN,ba6287f,ba6285fs, ba6285afp-y,ba6920fp-y www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. block diagram and pin configuration ba6920fp-y fig.33 ba6920fp-y table 5 ba6920fp-y pin name function 1 nc nc 2 nc nc 3 nc nc 4 nc nc 5 out2 driver output 6 rnf power ground 7 nc nc 8 gnd gnd 9 out1 driver output 10 nc nc 11 nc nc 12 nc nc 13 nc nc 14 nc nc 15 nc nc 16 vm power supply (driver stage) 17 vcc power supply (small signal) 18 fin control input (forward) 19 ps power save enable pin 20 rin control input (reverse) 21 vref reference voltage setting pin 22 nc nc 23 nc nc 24 nc nc 25 nc nc fin gnd gnd c2 c1 r1 m c3 17 16 9 18 20 ctrl tsd fin rin vm vcc out1 6 rnf 19 power save 8 fin gnd 5 out2 21 vref r2 r3 fig.34 ba6920fp-y (hsop25) nc nc gnd nc nc out2 rnf nc gnd out1 nc nc nc nc nc nc gnd nc nc vref rin ps fin vcc vm nc nc
technical note 11/17 BA6956AN,ba6287f,ba6285fs, ba6285afp-y,ba6920fp-y www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. external application components 1) resistor for the current limitation, r1 this is a current limiting resistor for collector loss reducti on and at the time of short-circuited output. it depends on the power supply voltage used, etc., but choose resistance of about 5 to 10 ? . in addition, set resistance with utmost care to voltage drop caused by inrush current that flows when the motor is started. 2) resistors and zener diode for the output high voltage setting, r2, r3 and zd these are the resistors and zener di ode used when output high voltage is set. as for the voltage, only ( v sat + v f ) lower than the vref pin voltage for ba6287f, ba6285fs and ba6285afp-y. (reference values; v sat 0.25v, v f 0.75v) zener diode zd is recommended to be used instead of resistor r3 when the power supply voltage is unstable for BA6956AN and ba6920fp-y. 3) stabilization capacitor for the power supply line, c1 please connect the capacitor of 1 f to 100 f for the stabilization of the power supply line, and confirm the motor operation. 4) phase compensating capacitor, c2, c3 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. functional descriptions 1) operation modes table 6 logic table in1 in2 out1 out2 operation l l open* open* stop (idling) h l h l forward (out1 > out2) l h l h reverse (out1 < out2) 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. ** output out1 and out2 become open regardless of the input logic of fin and rin when switching to the power save mode with the powersave pin. a) stand-by mode in stand-by mode, all output power transistors are tu rned off, and the motor output goes to high impedance. b) forward mode this operating mode is defined as the forward rotation of the motor when the out1 pin is high and out2 pin is low. when the motor is connected between the out1 and out2 pins, the current flows from out1 to out2. c) reverse mode this operating mode is defined as the reverse rotation of the motor when the out1 pin is low and out2 pin is high. when the motor is connected between the out1 and out2 pins, the current flows from out2 to out1. d) brake mode this operating mode is used to quickly st op the motor (short circuit brake). note) switching of rotating direction (fwd/rev) when the rotating direction is changed over by the motor ro tating condition, switch the direction after the motor is temporarily brought to the brake condition or open condit ion. it is recommended to keep the relevant conditions as follows: via brake: longer than braking time*. (* the time required for the output l terminal to achieve potential below gnd when brake is activated.) via open: the time longer than 1 ms is recommended.
technical note 12/17 BA6956AN,ba6287f,ba6285fs, ba6285afp-y,ba6920fp-y www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. 2) output high voltage setting this function optionally sets output volt age by the output high voltage setting pin and controls the motor rotating speed. however, when the output high voltage is set to a low level, consumption at ic increases. carry out thermal design with sufficient margin incorporated with the power dissipation (p d) under the actual application condition taken into account. a) ba6287f, ba6285fs, ba6285afp-y the circuit diagram associated with the output high voltage setting vref pin is as per shown on the right. the output high and low voltages v oh and v ol are expressed by: v oh = vref - ( v sat(q1) + v f(q2) ) v ol = v sat(q3) (reference values; v sat 0.15v, v f 0.7v) in addition, the relation of vref volt age to output voltage is expressed by: ( v sat(q1) + v f(q2) ) < vref < vm - v sat(q2) + v f(q2) + v sat(q1) therefore, when the vref voltage condition is as follows, the output high voltage is restricted. vref > vm - v sat(q2) + v sat(q1) + v f(q2) v oh = vm - v sat(q2) b) BA6956AN, ba6920fp-y the circuit diagram associated with the output high voltage setting vref pin is as per shown on the right. the output high and low voltages v oh and v ol are expressed by: v oh = vref + ( v f(q5) + v f(q4) ) - ( v f(q2) + v f(q3) ) v oh vref v ol = v sat(q6) (BA6956AN) v ol = v sat(q7) + v f(q6) (ba6920fp-y) (reference values; v sat 0.15v, v f 0.7v) the output high voltage controllable range is expressed by: vref < vcc - v sat(q1) - v f(q4) - v f(q5) vref < vm - ( v sat(q2) + v f(q3) ) + ( v f(q2) + v f(q3) ) - ( v f(q4) + v f(q5) ) (BA6956AN) vref < vm - v sat(q3) + ( v f(q2) + v f(q3) ) - ( v f(q4) + v f(q5) ) (ba6920fp-y) when the vref voltage condition is as follow s, the output high volt age is restricted. vref > vcc - v sat(q1) - v f(q4) - v f(q5) vref > vm - ( v sat(q2) + v f(q3) ) + ( v f(q2) + v f(q3) ) - ( v f(q4) + v f(q5) ) (BA6956AN) vref > vm - v sat(q3) + ( v f(q2) + v f(q3) ) - ( v f(q4) + v f(q5) ) (ba6920fp-y) v oh = vcc - v sat(q1) - v f(q2) - v f(q3) v oh = vm - v sat(q2) - v f(q3) (BA6956AN) v oh = vm - v sat(q3) (ba6920fp-y) vref vm out rnf (gnd, ba6287f) q1 q2 q3 fig.35 ba6287f, bd6285fs, ba6285afp-y vm vcc out rnf vref q1 q2 q3 q4 q5 q6 q7 vm vcc out rnf vref q1 q2 q3 q4 q5 q6 fig.36 BA6956AN fig.37 ba6920fp-y
technical note 13/17 BA6956AN,ba6287f,ba6285fs, ba6285afp-y,ba6920fp-y www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. interfaces (ba6285fs, ba6285afp-y, ba6920fp-y) fig. 38 fin, rin fig.39 power save (BA6956AN) (ba6287f, ba6285fs, ba6285afp-y) (ba6920fp-y) fig. 40 vcc, vm, out1, out2, vref, rnf, gnd fin rin vm vcc out1 out2 rnf vref vref vm out1 out2 rnf (gnd, ba6287f) vm vcc out1 out2 rnf vref power save
technical note 14/17 BA6956AN,ba6287f,ba6285fs, ba6285afp-y,ba6920fp-y www.rohm.com 2011.05 - rev.b ? 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) aso - area of safety operation when using the ic, set the output transistor so that it does not exceed absolute maximum ratings or aso. 7) 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. 8) operation in strong electromagnetic fields using this product in strong electromagnetic fields may cause ic malfunctions. use extreme caution with electromagnetic fields. 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.
technical note 15/17 BA6956AN,ba6287f,ba6285fs, ba6285afp-y,ba6920fp-y www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. 12) 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 16/17 BA6956AN,ba6287f,ba6285fs, ba6285afp-y,ba6920fp-y www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. ordering part number b a 6 2 8 5 a f p - y e 2 part no. part no. 6956a 6287 6285 6285a 6920 package n : sip9 f : sop8 fs : ssop-a16 fp-y : hsop25 packaging and forming specification e2: embossed tape and reel none: tube ? order quantity needs to be multiple of the minimum quantity. tube container quantity direction of feed 1000pcs direction of products is fixed in a container tube sip9 10.5 0.5 1 9 3.5 0.5 0.3 0.1 2.8 0.2 21.8 0.2 1.2 5.8 0.2 2.54 1.3 0.8 0.6 ? 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) sop8 0.9 0.15 0.3min 4 + 6 ? 4 0.17 +0.1 - 0.05 0.595 6 4 3 8 2 5 1 7 5.0 0.2 6.2 0.3 4.4 0.2 (max 5.35 include burr) 1.27 0.11 0.42 0.1 1.5 0.1 s 0.1 s ? 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 8 7 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
technical note 17/17 BA6956AN,ba6287f,ba6285fs, ba6285afp-y,ba6920fp-y www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. (unit : mm) hsop25 7.8 0.3 5.4 0.2 2.75 0.1 1.95 0.1 25 14 1 13 0.11 1.9 0.1 0.36 0.1 12.0 0.2 0.3min. 0.25 0.1 13.6 0.2 0.8 (max 13.95 include burr) s 0.1 s ? 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 2000pcs e2 () direction of feed reel 1pin
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.

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