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30310 sy 20100223-s00008 / 42308 ms pc 20080331-s00003 no.a1172-1/13 http://onsemi.com semiconductor components industries, llc, 2013 may, 2013 LV8761V overview the LV8761V is an h-bridge driver that can control four operation modes (forward, reverse, brake, and standby) of a motor. the low on-resistance, zero standby current, highly efficnet ic is optimal for use in driving brushed dc motors for office equipment. features ? forward/reverse h-bridge motor driver: 1 channel ? built-in current limiter circuit ? built-in thermal protection circuit ? built-in short-circuit protection function ? unusual condition warning output pin ? short-circuit protection circuit selectable from latch-type or auto reset-type specifications absolute maximum ratings at ta = 25 c parameter symbol conditions ratings unit vm max 38 v supply voltage v cc max 6v output peak current i o peak tw 20ms, duty 5% 4 a output continuous current i o max 3a logic input voltage v in -0.3 to v cc +0.3 v allowable power dissipation pd max mounted on a specified board. * 3.15 w operating temperature topr -20 to +85 c storage temperature tstg -55 to +150 c * specified circuit board : 90mm 90mm 1.6mm, glass epoxy 2-layer board (2s0p), with backside mounting. bi-cmos lsi forward/reverse h-bridge driver orderin g numbe r : ena1172a stresses exceeding maximum ratings may damage the device. maximum ratings are stress ratings only. functional operation above the recommended oper ating conditions is not implied. extended exposure to stresses above the recommended operating conditions may affect device reliabili ty.
LV8761V no.a1172-2/13 allowable operating ratings at ta = 25 c parameter symbol conditions ratings unit vm 9 to 35 v supply voltage range v cc 3 to 5.5 v vref input voltage vref 0 to v cc -1.8 v logic input voltage v in 0 to v cc v electrical characteristics at ta = 25c, vm = 24v, v cc = 5v, vref = 1.5v ratings parameter symbol conditions min typ max unit general standby mode current drain 1 imst ps = ?l? 1 a standby mode current drain 2 i cc st ps = ?l? 1 a operating mode current drain 1 im ps = ?h?, in1 = ?h?, with no load 1 1.3 ma operating mode current drain 2 i cc ps = ?h?, in1 = ?h?, with no load 3 4 ma vreg output voltage vreg i o = -1ma 4.75 5 5.25 v v cc low-voltage cutoff voltage vthv cc 2.5 2.7 2.9 v low-voltage hysteresis vo ltage vthhis 120 150 180 mv thermal shutdown temperature tsd design guarantee * 155 170 185 c thermal hysteresis width tsd design guarantee * 40 c output block ron1 i o = 3a, sink side 0.2 0.25 output on resistance ron2 i o = -3a, source side 0.32 0.40 output leakage current i o leak v o = 35v 50 a rising time tr 10% to 90% 200 500 ns falling time tf 90% to 10% 200 500 ns tplh in1 or in2 to outa or outb (l h) 550 700 ns input output delay time tphl in1 or in2 to outa or outb (h l) 550 700 ns charge pump block step-up voltage vgh vm = 24v 28.0 28.7 29.8 v rising time tong vg = 0.1 f 250 500 s oscillation frequency fcp 115 140 165 khz control system input block i in l v in = 0.8v adaptive pin : ps 5.6 8 10.4 a logic pin input current 1 i in h v in = 5v adaptive pin : ps 56 80 104 a i in l v in = 0.8v adaptive pin : in1, in2, emm 5.6 8 10.4 a logic pin input current 2 i in h v in = 5v adaptive pin : in1, in2, emm 35 50 65 a logic pin input h-level voltage v in h adaptive pin : ps, in1, in2, emm 2.0 v logic pin input l-level voltage v in l adaptive pin : ps, in1, in2, emm 0.8 v current limiter block vref input current iref -0.5 a current limit comparator threshold voltage vthlim vref = 1.5v 0.285 0.3 0.315 v short-circuit protection block scp pin charge current iscp scp = 0v 3.5 5 6.5 a comparator threshold voltage vthscp 0.8 1 1.2 v emo output saturation voltage vemo i o = 500 a 0.3 0.4 v * design guarantee value and no measurement is made.
LV8761V no.a1172-3/13 package dimensions unit : mm (typ) 3361 pin assignment sanyo : ssop36j(275mil) 15.0 7.6 5.6 (3.5) (4.0) 0.2 0.5 0.1 (1.5) 1.7 max 0.3 0.8 (0.7) 1 36 2 top view side view side view bottom view 1 v cc 2 pgnd 3 nc 4 nc 5 nc 6 outb 7 outb 8 rnf 9 rnf 10 vm 36 emm 35 scp 34 vref 33 nc 32 nc 31 nc 30 in2 29 in1 28 nc 27 reg5 11 vm 26 cp1 12 outa 25 cp2 13 outa 24 nc 14 nc 23 gnd 15 nc 22 nc 16 nc 21 vg 17 ps 20 nc 18 gnd 19 emot top view LV8761V
LV8761V no.a1172-4/13 substrate specifications (substrate recommended for operation of lv8761t) size : 90mm 90mm 1.6mm (two-layer substrate [2s0p]) material : glass epoxy copper wiring density : l1 = 95% / l2 = 95% l1 : copper wiring pattern diagram l2 : copper wiring pattern diagram cautions 1) the data for the case with the exposed die-pad substrate mounted shows the values when 90% or more of the exposed die-pad is wet. 2) for the set design, employ the derating design with sufficient margin. stresses to be derated include the voltage, current, junctio n temperature, power loss, and mechanical stresses such as vibration, impact, and tension. accordingly, the design must ensure these stresses to be as low or small as possible. the guideline for ordinary derating is shown below : (1)maximum value 80% or less for the voltage rating (2)maximum value 80% or less for the current rating (3)maximum value 80% or less for the temperature rating 3) after the set design, be sure to verify the design with the actual product. confirm the solder joint state and verify also the re liability of solder joint for the exposed die-pad, etc. any void or deterioration, if observed in the solder jo int of these parts, causes deteriorated thermal conduction, possibly resulting in thermal destruction of ic. 0 1.0 1.5 0.5 2.0 2.5 3.5 3.0 3.15 2.05 1.64 1.07 ? 20 40 60 80 20 010 0 ambient temperature, ta ? c allowable power dissipation, pd max ? w pd max ? ta *1 *2 *1 with exposed die-pad substrate *2 without exposed die-pad
LV8761V no.a1172-5/13 block diagram charge pump reference voltage circuit short-circuit protection circuit oscillation circuit tsd output preamplifier stage lvs output control logic output preamplifier stage ps emot v cc gnd +- vm +- vg cp2 vreg scp emm cp1 outb outa rnf pgnd vref in1 in2 m + - + - current limiter circuit
LV8761V no.a1172-6/13 pin functions pin no. pin name pin functtion equivalent circuit 29 30 36 in1 in2 emm output control signal input pin 1. output control signal input pin 2. short-circuit protection circuit mode switching pin. v cc gnd 10k 100k 17 ps power save signal input pin. 50k 50k 10k 10k gnd v cc 34 vref reference voltage input pin for output current limit setting. gnd v cc 500 35 scp short-circiut protection circuit, detection time setting capacitor connection pin. 500 gnd v cc 1 v cc power supply connection pin for control block. continued on next page.
LV8761V no.a1172-7/13 continued from preceding page. pin no. pin name pin functtion equivalent circuit 10, 11 12, 13 8, 9 6, 7 2 vm outa rnf outb pgnd motor power-supply connection pin. outa output pin. current sense resistor connection pin. outb output pin. power ground. reg5 gnd 500 500 7 6 10 11 13 12 8 9 2 26 25 21 cp1 cp2 vg charge pump capacitor connection pin. charge pump capacitor connection pin. charge pump capacitor connection pin. 100 gnd reg5 26 25 11 10 21 27 reg5 internal reference voltage output pin. gnd vm 2k 25k 74k 19 emot unusual condition warning output pin. v cc gnd 500 18, 23 gnd ground.
LV8761V no.a1172-8/13 dc motor driver 1.dcm output control logic contol input output ps in1 in2 outa outb mode l * * off off standby h l l off off output off h h l h l cw (forward) h l h l h ccw (reverse) h h h l l brake 2.current limit control timing chart braking operation time in current limit mode can be set by connecting a capacitor between scp and gnd pins. this setting is the same as the time setting required to turn off the outputs when an output short-circuit occurs as explained in the section entitled "output short-circuit protection function. " see "output short-circuit protection function," for the settinig procedure. 3.setting the current limit value the current limit value of the dcm driver is determined by the vref voltage and th e resistance (rnf) connected across the rnf and gnd pins using the following formula : ilimit [a] = (vref [v] /5) /rnf [ ]) assuming vref = 1.5v, rnf = 0.2 , the current limit is : ilimit = 1.5v/5/0.2 = 1.5a toff slow charge outa output current limit current outb
LV8761V no.a1172-9/13 output short-circuit protection function the LV8761V incorporates an output short-circuit protection circuit that turns off the output to prevent the ic from fatal damage when the output is short-circuited due to short- to-power or short-to-ground fa ult. either the ?latch-type,? in which the output off state is latched when the short-circ uit protection circuit is activated, or ?auto reset-type,? in which the output on/off states are rep eated when the short-circuit protection circuit is activated, can be selected. emm pin short-circuit protection mode l latch type h auto reset type 1.protection function operation (latch method) the short-circuit protection circuit is activated when it detect s the output short-circuit state. if the short-circuit state continues for the internally preset period ( 4 s), the protection circuit turns off the output from which the short-circuit state has been detected. then it turns the output on again after a lapse of the timer latch time described later. if the short-circuit state is still detected, it changes all the outputs to the standby mode and retains the state. the latched state is released by setting the ps to l. 2.how to set the scp pin constant (timer latch-up setting) the user can set the time at which the outputs are turned off when a short-circuit occurs by connecting a capacitor across the scp and gnd pins. the value of the capacitor can be determined by the following formula : timer latch-up : tocp tocp c v/i [s] v : comparator threshold voltage (1v typical) i : scp charge current (5 a typical) when a capacitor with a capac itance of 50pf is connected across the scp and gnd pins, for example, tscp is calculated as follows : tscp = 50pf 1v/5 a = 10 s 4 s short-circuit short- circuit short-circuit detection state scp voltage h-bridge output state internal counter 1st counter start 1st counter stop 1st counter start 1st counter end 2nd counter start 2nd counter end release threshold voltage output off output on output on standby state
LV8761V no.a1172-10/13 3.auto reset type the sequences up to the detection of an output short-circuit state ar e identical to those which ar e explained in section 1, "protection function operation (latch type). after output is turned off on detection of an output shor t-circuit condition, the internal counter starts counting and repeats turning on and off the output as shown in the figure below. this state continues until the overcurrent state is eliminated. 4.unusual condition warning output pin (emot) the LV8761V is provided with the emot pin which notifies the cpu of an unusual condition if the protection circuit operates by detecting an abnormal condition of the ic. this pi n is of the open-drain output type and requires a pull-up resistor when to be used. the emot pin is placed in the on state wh en one of the followi ng conditions occurs. 1. shorting-to-power or shorting-to-ground occurs at the output pin and the output short-circuit protection circuit is activated. 2. the ic junction temperature rises and the thermal protection circuit is activated. the emot pin is set to the off state when the relevant protection operation is eliminated. 2ms (typ) off on off on on detection current sequences exceeding the over-current detection current output current scp voltage
LV8761V no.a1172-11/13 application circuit example (when you use the current limit function) setting the current limit value when v cc = 5v, vref = 1.5v ilimit = vref/5/rnf = 1.5v/5/0.22 = 1.36a setting the current limit regeneration time and short-circuit detection time tscp c v/i = 100pf 1v/5 a = 20 s 1 2 3 nc 4 nc 5 nc 6 outb 7 outb 8 rnf 9 rnf 10 vm 36 emm 35 scp 34 vref 33 nc 32 nc 31 nc 30 in2 29 in1 28 nc 27 reg5 11 vm 26 cp1 12 outa 25 cp2 13 outa 24 nc 14 nc 23 gnd 15 nc 22 nc 16 nc 21 vg 17 ps 20 nc 18 gnd 19 emot LV8761V m control input control input control input monitor -+ -+ 100pf pgnd v cc
LV8761V no.a1172-12/13 (when you do not use the current limit function) setting at short-circuit state detection time t scp c ? v/i =100pf ? 1v/5 a =20 s *do the following processing when you do not use the current limit function. ? it is short between rnf-gnd. ? the terminal vref is hung on suitable potential of v cc or less. 1 2 3 nc 4 nc 5 nc 6 outb 7 outb 8 rnf 9 rnf 10 vm 36 emm 35 scp 34 vref 33 nc 32 nc 31 nc 30 in2 29 in1 28 nc 27 reg5 11 vm 26 cp1 12 outa 25 cp2 13 outa 24 nc 14 nc 23 gnd 15 nc 22 nc 16 nc 21 vg 17 ps 20 nc 18 gnd 19 emot LV8761V m control input control input control input monitor -+ -+ 100pf pgnd v cc
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