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1/17 www.rohm.com 2009.06 - rev.a ? 2009 rohm co., ltd. all rights reserved. system lens driver series for digital still cameras / single-lens reflex cameras 6ch system lens drivers for digital still cameras / single-lens reflex cameras bd6373gw,BD6873KN,bd6753kv description the bd6373gw motor driver provides 6 full-on drive h-bridge channels. the BD6873KN motor driver provides 5 full-on drive h-bridge channels and 1 linear cons tant-current drive h-bridge channel, wh ile the bd6753kv provides 4 full-on drive channels and 2 pwm constant-current drive h-bridge channels. stepping motors can be used for auto focus, and either zoom or ir is. a new drive type (lens barrier ) is also available. three t ypes of drivers for shutter are offered: a simple full-on type, a high-precision linear constant current type, or a high-efficiency pwm constan t current type, enabling selection of the ideal solution based on the application. features 1) subminiature 31pin wafer-level cs p (chip size package): 2.6 x 2.6 x 0.85mm 3 (bd6373gw) 2) dmos output allowing a range power supply: 4.5v to 10.5v (bd6753kv; vm1), 2.0v to 10.5v (bd6753kv; vm2 to vm4) 3) low on-resistance power mos output: full-on drive block with 1.2 ? typ. (bd6373gw) full-on drive block with 1.2 ? typ. and linear constant-current drive block with 1.0 ? typ. (BD6873KN) full-on drive block with 1.2 ? typ. and pwm constant-current drive block with 1.2 ? typ. (bd6753kv) 4) serial interface 3-line bus control input (bd6753kv) 5) built-in two-step output current setting switch for the linear constant-current drive block (BD6873KN) 6) drive mode switching function 7) 1.2v3% high-precision refe rence voltage output (BD6873KN) 8) constant-current drive blo ck features phase compensation capacitor-free design (BD6873KN) 9) built-in 3% high-precision linear constant-current driver (BD6873KN) 10) built-in peak current control pwm constant-current driver (bd6753kv) 11) built-in charge pump circuit for the dmos gate voltage drive (bd6753kv) 12) uvlo (under voltage lockout protection) function 13) built-in tsd (thermal shut down) circuit 14) standby current consumption: 0 a typ. absolute maximum ratings parameter symbol limit unit bd6373gw BD6873KN bd6753kv power supply voltage vcc -0.5 to +6.5 0 to +7 .0 -0.5 to +7.0 v motor power supply voltage vm -0.5 to +6.5 0 to +7.0 -0.5 to +12.5 v charge pump voltage vg - - 18.0 v control input voltage vin -0.5 to v cc+0.5 0 to vcc -0.5 to vcc+0.5 v power dissipation pd 940 1 950 2 1125 3 mw operating temperature ra nge topr -25 to +85 -25 to +85 -25 to +75 c junction temperature tjmax +150 +150 +150 c storage temperature range tstg -55 to +150 -55 to +150 -55 to +150 c h-bridge output current iout -800 to +800 4 -800 to +800 4 -800 to +800 4 ma/ch 1 reduced by 7.52mw/c over 25c, when mounted on a glass epoxy board (50mm x 58mm x 1.75mm; 8layers). 2 reduced by 7.6mw/c over 25c, when mounted on a glass epoxy board (70mm x 70mm x 1.6mm). 3 reduced by 9.0mw/c over 25c, when mounted on a glass epoxy board (70mm x 70mm x 1.6mm). 4 must not exceed pd, aso, or tjmax of 150c. no.09014eat02
bd6373gw, BD6873KN, bd6753kv technical note 2/17 www.rohm.com 2009.06 - rev.a ? 2009 rohm co., ltd. all rights reserved. operating conditions (ta=-25 to +85c(bd6373gw, BD6873KN), -25 to +75c(bd6753kv)) parameter symbol limit unit bd6373gw BD6873KN bd6753kv power supply voltage vcc 2.5 to 5.5 2.5 to 5.5 2.7 to 5.5 v motor power supply voltage vm 2.5 to 5.5 2.5 to 5.5 4.5 to 10.5 (vm1) v 2.0 to 10.5 (vm2 to vm4) control input voltage vin 0 to vcc 0 to vcc 0 to vcc v output current control input voltage range vlim - 0 to vcc 0 to 0.5 v pwm signal input frequency fpwm - - 0 to 0.1 mhz h-bridge output current iout -500 to +500 5 -500 to +500 5 -500 to +500 5 ma/ch 5 must not exceed pd or aso. electrical characteristics 1) bd6373gw electrical characteristics (unless ot herwise specified, ta=25c, vcc=3.0v, vm=5.0v) parameter symbol limit unit conditions min. typ. max. overall circuit current icc - 1.0 1.9 ma no signal and no load control input (in=enablexx, inputx, and brakex) high level input voltage vinh 2.0 - vcc v low level input voltage vinl 0 - 0.7 v high level input current iinh 15 30 60 a vinh=3v low level input current iinl -1 0 - a vinl=0v uvlo uvlo voltage vuvlo 1.6 - 2.4 v full-on drive block (ch1 to ch6) output on-resistance 1 ron1 - 1.2 1.5 ? io=400ma on high and low sides in total (vm=5v) output on-resistance 2 ron2 - 1.5 2.0 ? io=400ma on high and low sides in total (vm=3v) turn on time ton - 0.55 1.95 s rl=20 ? turn off time toff - 0.08 0.5 s rl=20 ? rise time tr 0.1 0.15 1.0 s rl=20 ? fall time tf - 0.03 0.2 s rl=20 ? 2) BD6873KN electrical characteristics (unless ot herwise specified, ta=25c, vcc=3.0v, vm=5.0v) parameter symbol limit unit conditions min. typ. max. overall circuit current during standby operation iccst - 0 10 a ps=0v circuit current icc - 1.2 2.3 ma ps=vcc with no signal and no load power-saving (ps) high level input voltage vpsh 2.0 - - v low level input voltage vpsl - - 0.7 v high level input current ipsh 15 30 60 a vps=3v low level input current ipsl -1 0 - a vps=0v control input (in=in1a to in5b, sel1 to 3, brk1, en1, in6, and vlims) high level input voltage vinh 2.0 - - v low level input voltage vinl - - 0.7 v high level input current iinh 15 30 60 a vinh=3v low level input current iinl -1 0 - a vinl=0v pull-down resistance rin 50 100 200 k ? uvlo uvlo voltage vuvlo 1.6 - 2.4 v full-on drive block (ch1 to ch5) output on-resistance ron - 1.2 1.5 ? io=400ma on high and low sides in total linear constant-current drive block (ch6) output on-resistance ron - 1.0 1.25 ? io=400ma on high and low sides in total vref output voltage vref 1.16 1.20 1.24 v iout=0~1ma output limit voltage vol 194 200 206 mv rnf=0.5 ? , vlim=0.2v
bd6373gw, BD6873KN, bd6753kv technical note 3/17 www.rohm.com 2009.06 - rev.a ? 2009 rohm co., ltd. all rights reserved. 3) bd6753kv electrical characteristics (unless ot herwise specified, ta=25 c, vcc=3.3v, vm=10.5v) parameter symbol limit unit conditions min. typ. max. overall circuit current during standby operation iccst - 0 10 a ps=0v circuit current icc - 2.2 3.0 ma ps=vcc with no signal; crx open power-saving (ps) high-level input voltage vpsh 2.0 - - v low-level input voltage vpsl - - 0.7 v high-level input current ipsh 25 50 100 a vpsh=3.3v low-level input current ipsl -1 0 - a vpsl=0v control input (in=strobe, clk, data, and pwm1 to 6) high-level input voltage vinh 2.0 - - v low-level input voltage vinl - - 0.7 v high-level input current iinh 16.5 33 66 a vinh=3.3v low-level input current iinl -1 0 - a vinl=0v pull-down resistance rin 50 100 200 k ? charge pump charge pump voltage vcp 16 16.5 - v uvlo uvlo voltage vuvlo 1.6 - 2.5 v full-on drive block (ch1 to ch4) output on-resistance ron - 1.2 1.5 ? io=400ma, vg=16.5v on high and low sides in total pwm linear constant-current drive block (ch5 and ch6) output on-resistance ron - 1.2 1.5 ? io=400ma, vg=16.5v on high and low sides in total vlim pin input current ivlim -1 -0.2 - a vlimx=0v, sensex=0.5v sense pin input current isense -1 -0.2 - a vlimx=0.5v, sensex=0v output limit voltage vol 485 500 515 mv vlimx=500mv cr clamp voltage vcr 0.8 0.9 1.0 v r=10k ? cr switching high voltage vcrh 0.72 0.80 0.88 v cr switching low voltage vcrl 0.36 0.40 0.44 v minimum on time tm inon 0.1 0.5 1.0 s c=470pf, r=10k ? constant voltage power supply vref output voltage vref 0.81 0.90 0.99 v iout=0~1ma
bd6373gw, BD6873KN, bd6753kv technical note 4/17 www.rohm.com 2009.06 - rev.a ? 2009 rohm co., ltd. all rights reserved. electrical characteristic diagrams 0 50 100 150 200 250 0 50 100 150 200 250 vlim voltag e : vlim [mv] rnf voltage : vrnf [mv] 0.0 1.0 2.0 3.0 4.0 5.0 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 supply voltag e : vm [v] output on resistance : ron [ ? ] 0.0 1.0 2.0 3.0 4.0 5.0 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 supply voltage : vm [v] output on resistance : ron [ ? ] 0.0 1.0 2.0 3.0 4.0 5.0 13.0 14.0 15.0 16.0 17.0 18.0 supply voltag e : vg [v] output on resistance : ron [ ? ] 0.0 1.0 2.0 3.0 4.0 5.0 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 supply voltag e : vm [v] output on resistance : ron [ ? ] 0.0 1.0 2.0 3.0 4.0 5.0 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 supply voltag e : vcc [v] circuit current : icc [ma] 0 250 500 750 1000 1250 0 25 50 75 100 125 150 ambient temperatur e : ta [c] power dissipation : pd [mw] 0 250 500 750 1000 1250 0 25 50 75 100 125 150 ambient temperatur e : ta [c] power dissipation : pd [mw] 0 250 500 750 1000 1250 0 25 50 75 100 125 150 ambient temperatur e : ta [c] power dissipation : pd [mw] fig.1 power dissipation reduction bd6373gw 940mw 489mw 85c fig.2 power dissipation reduction BD6873KN 950mw 494mw 85c fig.3 power dissipation reduction bd6753kv 1125mw 675mw 75c 0.0 1.0 2.0 3.0 4.0 5.0 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 supply voltag e : vcc [v] circuit current : icc [ma ] fig.5 circuit current BD6873KN op. range (2.5v to 5.5v) top 85 c mid 25c low -25c 0.0 1.0 2.0 3.0 4.0 5.0 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 supply voltag e : vcc [v] circuit current : icc [ma ] fig.4 circuit current bd6373gw op. range (2.5v to 5.5v) top 85 c mid 25c low -25c fig.6 circuit current bd6753kv op. range (2.7v to 5.5v) top 75 c mid 25c low -25c fig.8 output on-resistance (full - on drive block) BD6873KN op. range (2.5v to 5.5v) top 85 c mid 25c low -25c fig.9 output on-resistance ( linear constant - current drive BD6873KN op. range (2.5v to 5.5v) top 85 c mid 25c low -25c fig.7 output on-resistance (full - on drive block) bd6373gw op. range (2.5v to 5.5v) top 85 c mid 25c low -25c fig.10 output on-resistance (vm = 10.5v) bd6753kv top 75 c mid 25c low -25c fig.11 output limit voltage (rnf = 0.5 ? ) BD6873KN top 85 c mid 25c low -25c
bd6373gw, BD6873KN, bd6753kv technical note 5/17 www.rohm.com 2009.06 - rev.a ? 2009 rohm co., ltd. all rights reserved. block diagram, pin arrangement, and pin function 1 2 3 4 5 6 a out3a vm34 out3b out4a pgnd34 out4b b pgnd12 out3a input3 input4 out4b pgnd56 c out2b enable12 index post input5 out5a d out2a input1 enable34 brake5 brake6 out5b e out1b out1a input2 input6 out6b out6a f out1a vm12 vcc gnd vm56 out6b fig.12 bd6373gw block diagram fig.13 bd6373gw pin arrangement (top view) ucsp75m2 package bd6373gw pin function table no. pin name function no. pin name function a1 out3a h-bridge output pin ch3 a d1 out2a h-bridge output pin ch2 a a2 vm34 motor power supply pin ch3 and ch4 d2 input1 control input pin ch1 input a3 out3b h-bridge output pin ch3 b d3 enable34 control input pin ch3 and ch4 enable a4 out4a h-bridge output pin ch4 a d4 brake5 control input pin ch5 brake a5 pgnd34 motor ground pin ch3 and ch4 d5 brake6 control input pin ch6 brake a6 out4b h-bridge output pin ch4 b d6 out5b h-bridge output pin ch5 b b1 pgnd12 motor ground pin ch1 and ch2 e1 out1b h-bridge output pin ch1 b b2 out3a h-bridge output pin ch3 a e2 out1a h-bridge output pin ch1 a b3 input3 control input pin ch3 input e3 input2 control input pin ch2 input b4 input4 control input pin ch4 input e4 input6 control input pin ch6 input b5 out4b h-bridge output pin ch4 b e5 out6b h-bridge output pin ch6 b b6 pgnd56 motor ground pin ch5 and ch6 e6 out6a h-bridge output pin ch6 a c1 out2b h-bridge output pin ch2 b f1 out1a h-bridge output pin ch1 a c2 enable12 control input pin ch1 and ch2 enable f2 vm12 motor power supply pin ch1 and ch2 c3 index post - f3 vcc power supply pin c4 - f4 gnd ground pin c5 input5 control input pin ch5 f5 vm56 motor power supply pin ch5 and ch6 c6 out5a h-bridge output pin ch5 a f6 out6b h-bridge output pin ch6 b out3a, out4b, out1a, and out6b, which are 2 func tion pins, are shorted on printed circuit boards. vm12 f2 vcc out1a out1b l out2a out2b h bridge full on h bridge full on gnd enable12 input1 bandgap tsd & uvlo f4 c2 d2 f3 f1 e1 d1 c1 b1 vm34 a 2 out3a out3b out4a out4b h bridge full on h bridge full on b2 a 3 a 4 b5 a 5 l pgnd12 pgnd34 vm56 f5 out5a out5b out6a out6b h bridge full on h bridge full on c6 d6 e6 f6 b6 l pgnd56 input2 e3 logic12 enable34 input3 d3 b3 input4 b4 logic34 input5 brake5 c5 d4 input6 e4 brake6 d5 e2 a 1 a 6 e5 out3a, out4b, out1a, and out6b, which are 2 function pins, are shorted on printed circuit boards.
bd6373gw, BD6873KN, bd6753kv technical note 6/17 www.rohm.com 2009.06 - rev.a ? 2009 rohm co., ltd. all rights reserved. fig.14 BD6873KN block diagram fig.15 BD6873KN pin arrangement (top view) uqfn48 package BD6873KN pin function table no. pin name function no. pin name function 1 in2a control input pin ch2 a 25 vliml output current setting pin 2 ch6 2 in2b control input pin ch2 b 26 vl ims output current selection pin ch6 3 sel1 input mode selection pin ch1 and ch2 27 out6a h-bridge output pin ch6 a 4 in3a control input pin ch3 a 28 vm4 motor power supply pin ch6 5 in3b control input pin ch3 b 29 rnf resistance connection pin for output current detection ch6 6 vcc power supply pin 30 sense output current detection pin ch6 7 gnd ground pin 31 out6b h-bridge output pin ch6 b 8 in4a control input pin ch4 a 32 out5a h-bridge output pin ch5 a 9 in4b control input pin ch4 b 33 pgnd3 motor ground pin ch5 10 sel2 input mode selection pin ch3 and ch4 34 vm3 motor power supply pin ch5 11 in5a control input pin ch5 a 35 out5b h-bridge output pin ch5 b 12 in5b control input pin ch5 b 36 en1 control input pin ch6 enable 13 sel3 input mode selection pin ch5 37 in6 control input pin ch6 input 14 brk1 control input pin ch5 brake 38 ps power-saving pin 15 out3a h-bridge output pin ch3 a 39 out1a h-bridge output pin ch1 a 16 out3b h-bridge output pin ch3 b 40 out1b h-bridge output pin ch1 b 17 vm2 motor power supply pin ch3 and ch4 41 vm1 motor power supply pin ch1 and ch2 18 n.c. - 42 n.c. - 19 n.c. - 43 n.c. - 20 pgnd2 motor ground pin ch3 and ch4 44 pgnd1 motor ground pin ch1 and ch2 21 out4a h-bridge output pin ch4 a 45 out2a h-bridge output pin ch2 a 22 out4b h-bridge output pin ch4 b 46 out2b h-bridge output pin ch2 b 23 vref reference voltage output pin 47 in1a control input pin ch1 a 24 vlimh output current setting pin 1 ch6 48 in1b control input pin ch1 b level shift & pre driver out5a out5b h bridge full on pgnd3 ps vcc out1a out1b level shift & pre driver out2a out2b h bridge full on h bridge full on level shift & pre driver rnf out6a out6b h bridge const. current in1a bandgap tsd & uvlo 38 6 39 40 45 46 35 33 27 31 29 32 power save vm1 41 pgnd1 44 vm3 34 vm4 28 out3a out3b level shift & pre driver out4a out4b h bridge full on h bridge full on 15 16 21 22 17 pgnd2 20 vm2 in1b logic12 47 48 in2a in2b 1 2 sel1 3 logic12 in3b 4 5 in4a in4b 8 9 sel2 10 in3a in5b 11 12 sel3 brk1 13 14 in5a en1 36 in6 37 logic6 logic5 logic34 sense 30 gnd 7 vref vlims vlimh vliml selector vref 23 24 25 26 BD6873KN 48 36 12 24 in6 ps out1a out1b vm1 n.c. n.c. pgnd1 out2a out2b in1a in1b vlimh vref out4b out4a pgnd2 n.c. n.c. vm2 out3b out3a brk1 sel3 en1 out5b vm3 pgnd3 out5a out6b sense rnf vm4 out6a vlims vliml in2a in2b sel1 in3a in3b gnd in4a in4b sel2 in5a in5b vcc
bd6373gw, BD6873KN, bd6753kv technical note 7/17 www.rohm.com 2009.06 - rev.a ? 2009 rohm co., ltd. all rights reserved. fig.16 bd6753kv block diagram fig.17 bd6753kv pin arrangement (top view) vqfp8c package bd6753kv pin function table no. pin name function no. pin name function 1 pwm6 pwm control input pin ch6 25 vm3 motor power supply pin ch5 2 pwm1 pwm control input pin ch1 26 vlim5 output current setting pin ch5 3 pwm2 pwm control input pin ch2 27 cr1 cr timer setting element connection pin ch5 4 cp1 charge pump capacitor connection pin 1 28 ps power-saving pin 5 cp2 charge pump capacitor connection pin 2 29 vref reference voltage output pin 6 cp3 charge pump capacitor connection pin 3 30 gnd ground pin 7 cp4 charge pump capacitor connection pin 4 31 strobe serial enable input pin 8 vg charge pump output pin 32 clk serial clock input pin 9 vcc power supply pin 33 data serial data input pin 10 pwm3 pwm control input pin ch3 34 cr2 cr timer setting element connection pin ch6 11 pwm4 pwm control input pin ch4 35 vlim6 output current setting pin ch6 12 pwm5 pwm control input pin ch5 36 vm4 motor power supply pin ch6 13 out3a h-bridge output pin ch3 a 37 out6a h-bridge output pin ch6 a 14 rnf2 motor ground pin ch3 and ch4 38 sense4 output current detection pin ch6 15 out3b h-bridge output pin ch3 b 39 rnf4 resistance connection pin for output current detection ch6 16 vm2 motor power supply pin ch3 and ch4 40 out6b h-bridge output pin ch6 b 17 vm2 motor power supply pin ch3 and ch4 41 out1a h-bridge output pin ch1 a 18 out4a h-bridge output pin ch4 a 42 rnf1 motor ground pin ch1 and ch2 19 rnf2 motor ground pin ch3 and 4 43 out1b h-bridge output pin ch1 b 20 out4b h-bridge output pin ch4 b 44 vm1 motor power supply pin ch1 and ch2 21 out5a h-bridge output pin ch5 a 45 vm1 motor power supply pin ch1 and ch2 22 rnf3 resistance connection pin for output current detection ch5 46 out2a h-bridge output pin ch2 a 23 sense3 output current detection pin ch5 47 rnf1 motor ground pin ch1 and ch2 24 out5b h-bridge output pin ch5 b 48 out2b h-bridge output pin ch2 b bd6753kv 48 36 12 24 out6a sense4 rnf4 out6b out1a rnf1 out1b vm1 vm1 out2a rnf1 out2b out5b sense3 rnf3 out5 a out4b rnf2 out4 a vm2 vm2 out3b rnf2 out3 a vm4 vlim6 cr2 dat a cl k strobe gnd vref ps cr1 vlim5 vm3 pwm6 pwm1 pwm2 cp1 cp2 cp3 cp4 vg vcc pwm3 pwm4 pwm5 vcc out1a out1b level shift & pre driver out2a out2b h bridge full on h bridge full on clk strobe data bandgap tsd & uvlo 33 32 31 9 41 43 46 48 vm1 45 rnf1 47 out3a out3b level shift & pre driver out4a out4b h bridge full on h bridge full on 13 15 18 20 17 rnf2 19 vm2 charge pump charge pump cp1 4 cp2 5 cp3 6 cp4 7 vg 8 out5a out5b 21 24 25 rnf4 out6b h bridge pwm c. current 37 40 39 vm3 level shift & pre driver 36 vm4 out6a sense4 38 rnf3 22 sense3 23 h bridge pwm c. current vref pwm latch pwm latch vg vg vg logic45 ps pwm1 28 power save pwm2 2 3 pwm4 10 11 pwm3 pwm6 12 1 pwm5 logic56 logic12 logic34 serial interface 44 42 16 14 30 29 34 vlim5 vlim6 26 35 27 vref cr2 cr1 gnd vref osc
bd6373gw, BD6873KN, bd6753kv technical note 8/17 www.rohm.com 2009.06 - rev.a ? 2009 rohm co., ltd. all rights reserved. application circuit diagram and function explanation 1) power-saving function when low-level voltage is applied to ps pin, the ic will be turned off internally and the circuit current will be 0 a (typ.). during operating mode, ps pin should be high-level. (see the electrical characteristics; p.2/16) 2) motor control input (1) enablexx and inputx pins (bd6373gw), inxa, inxb, en 1 and in6 pins (BD6873KN), and pwmx pins (bd6753kv) these pins are used to program and cont rol the motor drive modes. (see the el ectrical characteristics; p.2/16 and p.3/16 and i/o truth tabl e; p.12/16 and p.13/16) (2) selx pins (BD6873KN) when the low-level voltage is applied to the selx pins, the i/o logic can be set to en/in mode. however, when the high-level voltage is applied, the i/o logic can be set to in/in mode. t he same selection made with the BD6873KN's selx pin can be made for the bd6753kv, using serial control. (see the electrical characte ristics; p.2/16 and p.3/16 and i/o truth table) (3) brakex pins (bd6373gw) and brk1 pin (BD6873KN) applying the high-level voltage pin will set the brake mode. the same selection made with the brake mode can be made for the bd6753kv, using serial control. (see the el ectrical characteristics; p.2/16 and p.3/16 and i/o truth table; p.12/16 and p.13/16) bypass filter capacitor for power supply input. (p.14/16) out5a out5b out3a out3b f2 level shift & pre driver h bridge full on h bridge full on enable12 input1 bandgap tsd & uvlo f4 c2 d2 f3 f1 e1 d1 c1 b1 a 2 h bridge full on h bridge full on b2 a 3 a 4 b5 a 5 level shift & pre driver f5 h bridge full on h bridge full on c6 d6 e6 f6 b6 level shift & pre driver input2 e3 logic12 enable34 input3 d3 b3 input4 b4 logic34 input5 brake5 c5 d4 input6 e4 brake6 d5 logic6 logic5 e2 a 1 a 6 e5 out1a out1b out2a out2b 1100uf vm12 pgnd12 out4a out4b 1100uf vm34 pgnd34 out6a out6b 1100uf vm56 pgnd56 vcc 1 100uf gnd m m bypass filter capacitor for power supply input. (p.14/16) bypass filter capacitor for power supply input. (p.14/16) bypass filter capacitor for power supply input. (p.14/16) motor control input (p.8/16) motor control input (p.8/16) motor control input (p.8/16) motor control input brake function (p.8/16) h : brake motor control input brake function (p.8/16) h : brake motor control input (p.8/16) fig.18 bd6373gw application circuit diagram
bd6373gw, BD6873KN, bd6753kv technical note 9/17 www.rohm.com 2009.06 - rev.a ? 2009 rohm co., ltd. all rights reserved. 3) h-bridge the 6-channel h-bridges of can be contro lled independently. for this reason, it is possible to drive the h-bridges simultaneously, as long as the package thermal tolerances are not exceeded. the h-bridge output transistors of the bd6373gw, BD6873KN and bd6753kv consist of power cmos, with the motor power supply vm, and power dmos, with the charge pump step-up power supply vg, respectively. the total h-bridge on-resistance on the high and low sides varies with the vm and vg voltages, respectively. the system must be designed so that the maximum h-bridge current for each channel is 800ma or below. 4) drive system of linear constant-c urrent h-bridge (BD6873KN: ch6) BD6873KN (ch6) enables linear constant-current driving. (1) reference voltage output (with a tolerance of 3%) the vref pin outputs 1.2v, based on the internal reference vo ltage. the output current of the constant-current drive block is controllable by connecting external resistance to t he vref pin of the ic and applying a voltage divided by the resistor to the output current setting pins (vlimh and vliml pins). it is recommended to set the external resistance to 2k ? or above in consideration of the current capacity of the vref pin, and 20k ? or below in order to minimize the fluctuation of the set value caused by the base current of the internal transistor of the ic. fig.19 BD6873KN application circuit diagram output current selection (p.10/16) h : vliml l : vlimh level shift & pre driver out5a out5b h bridge full on pgnd3 ps vcc 1 100uf out1a out1b level shift & pre driver out2a out2b h bridge full on h bridge full on m level shift & pre driver rnf 0.1 ? ~5.0 ? out6a out6b h bridge const. current in1a bandgap tsd & uvlo 38 6 39 40 45 46 35 33 27 31 29 32 power save 1100uf vm1 41 pgnd1 44 1100uf vm3 34 1100uf vm4 28 out3a out3b level shift & pre driver out4a out4b h bridge full on h bridge full on m 15 16 21 22 1100uf 17 pgnd2 20 vm2 in1b logic12 47 48 in2a in2b 1 2 sel1 3 logic12 in3b 4 5 in4a in4b 8 9 sel2 10 in3a in5b 11 12 sel3 brk1 13 14 in5a en1 36 in6 37 logic6 logic5 logic34 sense 30 gnd 7 vref vlims vlimh vliml selector vref 23 24 25 26 r 2 r 3 r 1 bypass filter capacitor for power supply input. (p.14/16) bypass filter capacitor for power supply input. (p.14/16) bypass filter capacitor for power supply input. (p.14/16) bypass filter capacitor for power supply input. (p.14/16) bypass filter capacitor for power supply input. (p.14/16) the output current is converted to a voltage with the rnf external resistor and transmitted to the sense pin. (p.10/16) iout[a] = (vlimh or vliml[v]) rnf[ ? ] power-saving (p.8/16) h : active l : standby motor control input (p.8/16) drive mode selection (p.8/16) h : en/in l : in/in motor control input (p.8/16) drive mode selection (p.8/16) h : en/in l : in/in motor control input (p.8/16) motor control input brake function (p.8/16) h : brake motor control input (p.8/16) when using the vref voltage (1.2v) resistance division value as vlimh and vliml input value, select r 1 , r 2 , and r 3 values such that, 2k ? Q r 1 +r 2 +r 3 Q 20k ? (p.9/16) drive mode selection (p.8/16) h : en/in l : in/in
bd6373gw, BD6873KN, bd6753kv technical note 10/17 www.rohm.com 2009.06 - rev.a ? 2009 rohm co., ltd. all rights reserved. (2) output current settings and setting changes when the low-level control voltage is applied to the vlims pin, the value on the vlimh pin will be used as an output current set value to control the output current. when the high-level cont rol voltage is applied to the vlims pin, the value on the vlim l pin will be used as an output current set value to control th e output current. (see the electrical characteristics; p.2/16) (3) output current detection and current settings by connecting external resistor (0.1 ? to 5.0 ? ) to the rnf pin of the ic, the motor drive current will be converted into voltage in order to be detected. the output current is kept constant by shorting the rnf and sense pins and comparing the voltage with the vlimh or vliml voltage. to perform output current settings mo re precisely, trim the external rnf resistance if needed, and supply a precise voltage externally to the vlimh or vl iml pin of the ic. in that case, open the vref pin. ?????? (1) the output current is 400ma ? 3% if 0.2v is applied to the vlimh or vliml pin and a 0.5 ? resistor is connected externally to the rnf pin. if the vlimh and vliml pins are shorted to the vcc pin (or the same voltage level as the vcc is applied) and the sense and rnf pins are shorted to the ground, this channel can be used as a full-on drive h-bridge like the other five channels. fig.20 bd6753kv application circuit diagram bypass filter capacitor for power supply input. (p.14/16) bypass filter capacitor for power supply input. (p.14/16) bypass filter capacitor for power supply input. (p.14/16) bypass filter capacitor for power supply input. (p.14/16) bypass filter capacitor for power supply input. (p.14/16) power-saving (p.8/16) h : active l : standby motor control input (p.8/16) motor control input (p.8/16) motor control input (p.8/16) serial control input (p.12/16) the output current is converted to a voltage with the rnf4 external resistor and transmitted to the sense4 pin. (p.11/16) iout[a] = vlim6[v] rnf4[ ? ] when using the vref voltage (0.9v) resistance division value as vlim5 and vlim6 input value, select r 1 , r 2 , and r 3 values such that, 1k ? Q r 1 +r 2 +r 3 Q 20k ? (p.11/16) this cr timer determines the off time for the pwm drive. 5k ? Q r cr2 Q 50k ? 10pf Q c cr2 Q 2200pf (p.11/16) this cr timer determines the off time for the pwm drive. 5k ? Q r cr1 Q 50k ? 10pf Q c cr1 Q 2200pf (p.11/16) connecting 0.01 f to 0.1 f capacitors between the cp1 and cp2, cp3 and cp4, and vg and gnd pins generate a vg voltage of approximately vm1 + (vcc ? 2). use caution to ensure that the voltage differential between vg and vm is 4.5v or higher, and that the vg voltage does not exceed the absolute maximum rating of 18v, especially bst voltage direct input. (p .12/16 ) vcc 1 100uf out1a out1b l out2a out2b h bridge full on h bridge full on m clk strobe data bandgap tsd & uvlo 33 32 31 9 41 43 46 48 :?c>:?:?:?::?:w vm1 45 rnf1 47 out3a out3b l out4a out4b h bridge full on h bridge full on m 13 15 18 20 :?c>:?:?:?::?:w 17 rnf2 19 vm2 charge pump charge pump cp1 4 cp2 5 cp3 6 cp4 7 vg 8 out5a out5b 21 24 :?c>:?:?:?::?:w 25 rnf4 0.1 ? ~5.0 ? out6b h bridge pwm c. current 37 40 39 vm3 l :?c>:?:?:?::?:w 36 vm4 out6a sense4 38 rnf3 0.1 ? ~5.0 ? 22 sense3 23 h bridge pwm c. current vref pwm latch pwm latch 0.1 f 0.1 f vg vg vg logic45 ps pwm1 28 power save pwm2 2 3 pwm4 10 11 pwm3 pwm6 12 1 pwm5 logic56 logic12 logic34 serial interface 44 42 16 14 30 29 34 r 2 r 3 r 1 vlim5 vlim6 26 35 27 r cr2 c cr2 r cr1 c cr1 vref cr2 cr1 gnd vref 0.1 f osc the output current is converted to a voltage with the rnf3 external resistor and transmitted to the sense3 pin. (p.11/16) iout[a] = vlim5[v] rnf3[ ? ] vlimh[v] or vliml[v] rnf[ ? ] output current value iout[a] = select vlimh when vlims is low-level select vliml when vlims is high-level
bd6373gw, BD6873KN, bd6753kv technical note 11/17 www.rohm.com 2009.06 - rev.a ? 2009 rohm co., ltd. all rights reserved. 5) drive system of pwm constant-current h-bridge (bd6753kv: ch5 and ch6) bd6753kv (ch5 and ch6) enable peak current control pwm constant-current driving. (1) output current detection and current settings by connecting external resistance (0.1 ? to 5.0 ? ) to the rnf3 and rnf4 pins of the ic, the motor drive current will be converted into voltage in order to be detected. the output current is kept constant by shorting the rnf3 and rnf4 pins with the sense3 and sense4 pins, respectively, and comparing the vo ltage to the set voltage input from outside the ic to the vlim5 and vlim6 pins. as with the BD6873KN, the referenc e voltage generated inside the ic (vref pin: 0.9v10%) can be divided using external resistors (from 1k ? to 20k ? ). the resulting value can be input as the set voltage. it is also necessary to connect a resistor and capacitor to the cr1 and cr2 pins, to determine the pwm drive off time. (2) pwm constant-current control operation when the output current in output on mode increases, and t he rnf3 or rnf4 voltage reaches the value set with the vlim5 or vlim6 voltage, the internal current limiting comparat or operates to set the ic to short mode. this caused the current to be attenuated so t hat the h-bridge's low-side dmos is on. once the off time (toff) ends, as measured by the cr timer, the ic returns to output on mode. by repeati ng this cycle, the ic maintains a fixed current due to the motor's inductance characteristics. (3) noise cancellation function in order to avoid false detections by the current limiting comparator (caused by spike noise generated when output is turned on), the ic uses the noise cancellation time (tn) to disable current detection. this begins from the time output turns on, until the noise cancellation time elapses. the noise cancellation time represents the minimum on time, and is determined by the cr pin's internal resist or, external resistor, and capacitor. (4) cr timer when output turns on, the cr pin is clamped at approxim ately 0.9v. when the mode c hanges to short mode, it discharges to approximately 0.4v. the interval over which this 0.5v voltage differential is discharged, is determined by the off time (toff). once the cr pin voltage reaches 0.4v , the pin begins to charge as the output turns on, until it reaches 0.9v. the interval over which the pin charges fr om 0.4v to approximately 0.8v is given by the noise cancellation time (tn). toff and tn are determined by the external resistor and capacitor connected to the cr pin. a low resistance value to the cr pin will prevent it from reac hing the clamp voltage. t herefore a resistor from 5 k ? to 50k ? should be used. capacitors should be from 10pf to 2 200pf. the use of a capacitance in excess of 2200pf will lengthen the noise cancellation time and may cause the out put current to exceed the set current. setting a longer off time may increase the output current ripple, reducing bot h the average current and the motor's rotational efficiency. ?????? (2) fig.21 bd6753kv peak current control pwm c onstant-current drive using the cr timer if the vlim5 or vlim6 is shorted to the vcc pin (or the sa me voltage level as the vcc is applied) and the sense3 or sense4 and rnf3 or rnf4 pins are shorted to the ground, this channel can be used as a full-on drive h-bridge like the other four channels. output current value iout[a] = vlim5[v] rnf3[ ? ] vlim6[v] rnf4[ ? ] or output current: iout[a] rnf voltage: vrnf[v] cr voltage: vcr[v] pwm constant-current setting value 0v vlim pin setting voltage 0.9v 0.8v 0.4v noise cancellation time: tn[sec] charge period discharge period off time: toff[sec] spike noise 0a
bd6373gw, BD6873KN, bd6753kv technical note 12/17 www.rohm.com 2009.06 - rev.a ? 2009 rohm co., ltd. all rights reserved. 6) charge pump (bd6753kv) each output h-bridge of the bd6753kv on the high and low sides consists of nch dmos. ther efore, the gate voltage vg should be higher than the vm voltage to drive the nch dmos on the high side.the bd6753kv has a built-in charge pump circuit that generates vg voltage by connecting an external capacitor (0.01 f to 0.1 f). if a 0.1 f capacitor is connected between: cp1 and cp2, cp3 and cp4, vg and gnd then, vg pin output voltag e will be: vm1 + (vcc ? 2) if a 0.1 f capacitor is connected between: cp1 and cp2, vg and gnd cp4 and vg pins are shorted, and cp3 pin is open then, vg pin output voltag e will be: vm1 + vcc the vm1 to vm4 respectively can be set to voltages differen t to one another. in order to ensure better performance, the voltage differential between vg and vm must be 4.5v or higher, and the vg voltage must not exceed the absolute maximum rating of 18v. 7) serial interface (bd6753kv) the bd6753kv provides an 8-bit, 3-line serial interface for setting output modes. data is sent to the internal shift register during the strobe low interval at the clk rising edge. shift regi ster data is written to the ic's internal 6-bit memory at the strobe rising edge, according to the addresses stored in bit[7] and bit[6]. the serial data input order is bit[0] to bit[7]. serial settings are reset when the ps pin changes to lo w-level control voltage, triggering standby mode. serial settings are also reset when the uvlo circuit operates. bd6753kv serial resistor bit map no. address bit data bit bit[7] bit[6] bit[5] bit[4] bit[3] bit[2] bit[1] bit[0] 00h 0 0 mod2 mod1 p2a p2b p1a p1b 01h 0 1 mod4 mod3 p4a p4b p3a p3b 02h 1 0 mod6 mod5 p6a p6b p5a p5b i/o truth table bd6373gw full-on driver ch1 to ch2 i/o truth table drive mode input output output mode enable12 inputx outxa outxb en/in h x z z standby l l h l cw l h l h ccw bd6373gw full-on driver ch3 to ch4 i/o truth table drive mode input output output mode enable34 inputx outxa outxb en/in h x z z standby l l h l cw l h l h ccw bd6373gw full-on driver ch5 to ch6 i/o truth table drive mode input output output mode inputx brakex outxa outxb in/in l l h l cw h l l h ccw x h l l brake l: low, h: high, x: d on't care, z: high impedance at cw, current flows from outa to outb. at ccw, current flows from outb to outa. fig.22 bd6753kv sequence of serial control input strobe clk data bit[0] bit[1] bit[2] bit[3] bit[4] bit[5] bit[6] bit[7] bit[0 ] bit[1] bit[5] bit[6] bit[7] 100% 0% 100% 0% 100% 0% data bits address bits timing of input serial data writing to internal register address bits timing of register data writing to internal memory data bits
bd6373gw, BD6873KN, bd6753kv technical note 13/17 www.rohm.com 2009.06 - rev.a ? 2009 rohm co., ltd. all rights reserved. BD6873KN full-on driver ch1 to ch4 i/o truth table drive mode input output output mode selx inxa inxb outxa outxb en/in l h x z z standby l l h l cw l h l h ccw in/in h l l z z standby h l h l cw l h l h ccw h h l l brake l: low, h: high, x: d on't care, z: high impedance at cw, current flows from outa to outb. at ccw, current flows from outb to outa. BD6873KN full-on driver ch5 i/o truth table drive mode input output output mode sel3 in5a in5b brk1 out5a out5b en/in l h x x z z standby l l l h l cw l h l l h ccw l x h l l brake in/in h l l x z z standby h l x h l cw l h x l h ccw h h x l l brake l: low, h: high, x: d on't care, z: high impedance at cw, current flows from outa to outb. at ccw, current flows from outb to outa. BD6873KN linear cons tant-current driver ch6 i/o truth table drive mode input output output mode en1 in6 out6a out6b en/in h x z z standby l l h l cw l h l h ccw l: low, h: high, x: d on't care, z: high impedance at cw, current flows from outa to outb. at ccw, current flows from outb to outa. bd6753kv ch1 to ch6 i/o truth table drive mode input output output mode serial data terminal modx pxa pxa pwmx outxa outxb in/in l l l x z z standby l h l l h ccw l h h l l brake h l l h l cw h l h l l brake h h x l l brake en/in h l x x z z standby h l l h l cw h l h l h ccw h h x l l brake l: low, h: high, x: d on't care, z: high impedance at cw, current flows from outa to outb. at ccw, current flows from outb to outa.
bd6373gw, BD6873KN, bd6753kv technical note 14/17 www.rohm.com 2009.06 - rev.a ? 2009 rohm co., ltd. all rights reserved. i/o circuit diagram operation notes 1) absolute maximum ratings use of the ic in excess of absolute maximum ratings such as the applied voltage or operating temperature range may result in ic damage. assumptions should not be made regarding the state of the ic (short mode or open mode) when such damage is suffered. the implementation of a physical safety measure such as a fuse should be considered when use of the ic in a special mode where the absolute maximum ratings may be exceeded is anticipated. 2) storage temperature range as long as the ic is kept within this range, there should be no problems in the ic?s performance. conversely, extreme temperature changes may result in poor ic performanc e, even if the changes are within the above range. fig.23 bd6373gw i/o circuit diagram (resistance values are typical ones) enablexx, inputx, brakex vm x, outxa, outxb, pgndx pgndx outxa vmx outxb vcc 10k ? vcc 140k ? 100k ? ps, inxa, inxb, en1, in6, vlims fig.24 BD6873KN i/o circuit diagram (res istance values are typical ones) vcc 10k ? vcc 100k ? vmx, outxa, outxb, pgndx, rnf vlimh, vliml, sense pgndx rnf outxa vmx outxb vcc vcc 200k ? vref vcc 10k ? ps fig.25 bd6753kv i/o circuit diagram (resistance values are typical ones) strobe, clk, data, pwmx cph1, cpl1 vlimx, sensex vcc 70k ? 40k ? cp4 cp2 vg vm1 outxa rnfx vmx outxb vcc vcc 10k ? vcc 100k ? vmx, outxa, outxb, rnfx vcc vcc 100k ? cp3, cp1 vg, cp4, cp2 cr1, cr2 vcc 1k ? vcc vcc vcc vcc 5k ?
bd6373gw, BD6873KN, bd6753kv technical note 15/17 www.rohm.com 2009.06 - rev.a ? 2009 rohm co., ltd. all rights reserved. 3) power supply pins and lines none of the vm line for the h-bridges is internally connected to the vcc po wer supply line, which is only for the control logic or analog circuit. therefore, the vm and vcc lines ca n be driven at different voltages. although these lines can be connected to a common power supply, do not open the power supply pin but connect it to the power supply externally. regenerated current may flow as a result of the motor's back electromotive forc e. insert capacitors between the power supply and ground pins to serve as a r oute for regenerated current. determine the ca pacitance in full consideration of all the characteristics of the electrolytic capacitor, because the electrolytic capacitor may loose some capacitance at low temperatures. if the connected power supply does not have sufficient current absorpt ion capacity, regenerative current will cause the voltage on the power supply line to rise, which combined with the product and its peripheral circuitry may exceed the absolute maximum ratings. it is recommended to implement a physical safety measure such as the insertion of a voltage clamp diode between the power supply and ground pins. for this ic with several power supplies and a part consists of the cmos block, it is possible that rush current may flow instantaneously due to the internal powering sequence and delays, and to the unstable internal logic, respectively. therefore, give special consideration to power coupling capacitance, width of power and ground wirings, and routing of wiring. 4) ground pins and lines ensure a minimum gnd pin potential in all operating conditions. make sure that no pins are at a voltage below the gnd at any time, regardless of whether it is a transient signal or not. when using both small signal gnd and large current mgnd pattern s, it is recommended to isolate the two ground patterns, placing a single ground point at the app lication's reference point so that the pa ttern wiring resistance and voltage variations caused by large currents do not cause variations in the small signal ground voltage. be careful not to change the gnd wiring pattern of any external components, either. the power supply and ground lines must be as short and thick as possible to reduce line impedance. 5) thermal design use a thermal design that allows for a sufficient margin in light of the power dissipation (pd) in actual operating conditions. 6) pin short and wrong direction assembly of the device 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 positive and ground power supply termi nals are reversed. the ic may also be damaged if pins are shorted together or are shorted to other circuit?s power lines. 7) actions in strong magnetic field use caution when using the ic in the pres ence of a strong magnetic field as doi ng so may cause the ic to malfunction. 8) aso when using the ic, set the output transistor for the motor so that it does not exceed absolute maximum ratings or aso. 9) thermal shutdown circuit if the junction temperature (tjmax) reaches 175c, the tsd circuit will operate, and the coil output circuit of the motor will open. there is a temperature hyster esis of approximately 25c (bd637 3gw and BD6873KN typ.) and 25c (bd6753kv typ.). the tsd circuit is designed only to shut off the ic in order to prevent runaway therma l operation. it is not designed to protect the ic or guarantee its operation. the performance of the ic?s characte ristics is not guaranteed and it is recommended that the device is replaced after the tsd is activated. 10) serial data input in the bd6753kv, data input string start with lsb first. the serial settings are reset during standby mode operation and whenever the uvlo or ts d circuits are operating. 11) power saving terminal be cancelled power saving mode after turned on power supply vcc and vm, because of ps terminal combines power saving with serial reset function. if t he case of power saving terminal always shorted power supply terminal, reset function may not be well, and it may cause the ic to malfunction. 12) testing on application board when testing the ic on an application board, connecting a capacito r to a pin with low impedance subjects the ic to stress. always discharge capacitors after each process or step. always turn the ic's power supply off before connecting it to, or removing it from a jig or fixture, during the inspection process. ground the ic during a ssembly steps as an antistatic measure. use similar precaution wh en transporting and storing the ic. 13) application example the application circuit is recommended for use. make sure to confirm the adequacy of the characteristics. when using the circuit with changes to the external circuit constants, make sure to leave an adequate margin for external components including static and transitional characteri stics as well as dispersion of the ic. 14) regarding input pin of the ic this monolithic ic contains p+ isolat ion and p substrate layers between adjac ent elements to keep them isolated. p-n junctions are formed at the intersection of these p layers with the n layers of other elements, creating a parasitic diode or transistor. for example, the relation be t ween each potential is as follows: when gnd > pin a, the p-n junction operates as a parasitic diode. when gnd > pin b, the p-n junction operates as a parasitic diode and transistor. parasitic elements can occur inevitably in the structure of the ic. the operation of parasitic elements can result in mutual interference among circuits, operational faults, or physical damage. accordingly, methods by which parasitic elements operate, such as applying a voltage that is lower than the gnd (p substrate) voltage to an input pin, should not be used. parasitic element other adjacent elements parasitic element resistor transistor (npn) n n n p + p + p p substrate gnd pin a n n p + p + p p substrate gnd parasitic element pin b c b e n gnd pin a parasitic element pin b e b c gnd fig.26 example of simple ic architecture
bd6373gw, BD6873KN, bd6753kv technical note 16/17 www.rohm.com 2009.06 - rev.a ? 2009 rohm co., ltd. all rights reserved. ordering part number b d 6 3 7 3 g w - e 2 part no. part no. 6373 : f.on 6ch 6873 : f.on 5ch+c.c. 1ch 6753 : f.on 4ch+pwm 2ch package gw : ucsp75m2 kn : uqfn48 kv : vqfp48c packaging and forming specification e2: embossed tape and reel (ucsp75m2/ uqfn48)) none: tray (vqfp48c) ? 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 3000pcs e2 () direction of feed reel 1pin (unit:mm) ucsp75m2 (bd6373gw) (unit : mm) uqfn48 0.05 m 0.05 0.6 - 0.3 +0.1 25 24 13 (1.4) 3-(0.45) 0.4 12 +0.03 - 0.02 0.02 48 36 (0.2) 37 0.95max (0.55) 1 7.2 0.1 7.2 0.1 0.22 0.05 7.0 0.1 0.2 0.05 7.0 0.1 notice : do not use the dotted line area for soldering ? order quantity needs to be multiple of the minimum quantity. embossed carrier tape (with dry pack) 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
bd6373gw, BD6873KN, bd6753kv technical note 17/17 www.rohm.com 2009.06 - rev.a ? 2009 rohm co., ltd. all rights reserved. ? order quantity needs to be multiple of the minimum quantity. tray container quantity direction of feed 1000pcs direction of product is fixed in a tray 1pin (unit : mm) vqfp48c +6 4 - 4 0.08 m 0.08 s 24 37 48 36 25 12 1 13 0.50.15 7.0 0.1 7.0 0.1 1pin mark 0.75 1.4 0.05 - 0.03 0.5 0.1 +0.05 1.6max 0.75 0.145 - 0.04 +0.05 0.22 0.1 0.05 1.00.2 9.0 0.2 9.0 0.2
r0039 a www.rohm.com ? 2009 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 specified herein is subject to change for improvement without notice. the content specified 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 specifications, 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 specified 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 specified herein is intended only to show the typical functions of and examples of application circuits for the products. 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 specified in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, office-automation equipment, commu- nication devices, electronic appliances and amusement devices). the products specified 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, fire or any other damage caused in the event of the failure of any product, such as derating, redundancy, fire 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 specified 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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