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82411 sy 20110808-s00001/22410 sy/42308 ms pc no.a1157-1/11 http://onsemi.com semiconductor components industries, llc, 2013 may, 2013 lv8760t overview the lv8760t 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 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. * 3.3 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 : ena1157b 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.
lv8760t no.a1157-2/11 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 5.6 8 10.4 a logic pin input current 2 i in h v in = 5v adaptive pin : in1, in2 35 50 65 a logic pin input h-level voltage v in h adaptive pin : ps, in1, in2 2.0 v logic pin input l-level voltage v in l adaptive pin : ps, in1, in2 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 blanking time tblk 1.6 2.0 2.4 s 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 * design guarantee value and no measurement is made.
lv8760t no.a1157-3/11 package dimensions unit : mm (typ) 3279 pin assignment 6.4 0.65 4.4 (0.33) (1.0) 6.5 0.5 0.15 1 10 20 11 0.22 0.08 1.2max side view bottom view exposed die-pad top view sanyo : tssop20j(225mil) 1 pgnd 2 outb 3 outb 4 rnf 5 rnf 6 vm 7 vm 8 outa 9 outa 10 ps 20 v cc 19 scp 18 vref 17 in2 16 in1 15 reg 5 14 cp1 13 cp2 12 vg 11 gnd lv8760t
lv8760t no.a1157-4/11 substrate specifications (substrate recommended for operation of lv8760t) 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 1.60 2.0 3.0 3.30 4.0 1.72 0.83 ? 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
lv8760t no.a1157-5/11 block diagram charge pump reference voltage circuit short-circuit protection circuit oscillation circuit tsd output preamplifier stage lvs output control logic current limiter circuit output preamplifier stage ps v cc gnd +- vm +- vg cp2 reg5 scp cp1 outb outa rnf pgnd vref in1 in2 m + - + -
lv8760t no.a1157-6/11 pin functions pin no. pin name pin functtion equivalent circuit 16 17 in1 in2 output control signal input pin 1. output control signal input pin 2. v cc gnd 10k 100k 10 ps power save signal input pin. 50k 50k 10k 10k gnd v cc 18 vref reference voltage input pin for output current limit setting. gnd v cc 500 19 scp short-circiut protection circuit, detection time setting capacitor connection pin. 500 gnd v cc 20 v cc power supply connection pin for control block. continued on next page.
lv8760t no.a1157-7/11 continued from preceding page. pin no. pin name pin functtion equivalent circuit 6, 7 8, 9 4, 5 2, 3 1 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 3 2 6 7 9 8 4 5 1 14 13 12 cp1 cp2 vg charge pump capacitor connection pin. charge pump capacitor connection pin. charge pump capacitor connection pin. 100 gnd reg5 14 13 7 6 12 15 reg5 internal reference voltage output pin. gnd vm 2k 25k 74k 11 gnd ground.
lv8760t no.a1157-8/11 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
lv8760t no.a1157-9/11 output short-circuit protection function the lv8760t incorporates an output short-circuit protection circuit. it turns the ouputs off to prevent destruction of the ic if a problem such as an output pin being shorted to the motor power supply or ground occurs. 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
lv8760t no.a1157-10/11 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 pgnd 2 outb 3 outb 4 rnf 5 rnf 6vm 7vm 8 outa 9 outa 10 ps 20 v cc 19 scp 18 vref 17 in2 16 in1 15 reg5 14 cp1 13 cp2 12 vg 11 gnd lv8760t 0.22 35k m 15k 100pf +- -+ 10 f 0.1 f 0.1 f 0.1 f 0.1 f control input control inpu t
lv8760t no.a1157-11/11 (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 pgnd 2 outb 3 outb 4 rnf 5 rnf 6vm 7vm 8 outa 9 outa 10 ps 20 v cc 19 scp 18 vref 17 in2 16 in1 15 reg5 14 cp1 13 cp2 12 vg 11 gnd lv8760t m 100pf +- -+ control input control input on semiconductor and the on logo are registered trademarks of semiconductor components industries, llc (scillc). scillc owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. a listing of scillc?s product/patent coverage may be accessed at www.onsemi.com/site/pdf/patent-marking.pdf. scillc reserves the right to make changes without further notice to any products herein. scillc mak es no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does scillc assume any liability ar ising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequentia l or incidental damages. ?typical? parameters which may be provided in scillc data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. all operating parameters, including ?typicals? must be validated for each customer application by customer?s techn ical experts. scillc does not convey any license under its patent rights nor the rights of others. scillc products are not designed, intended, or authorize d for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other appli cation in which the failure of the scillc product could create a situation where personal injury or death may occur. should buyer purchase or use scillc products for any such unintended or unauthorized application, buyer shall indemnify and hold scillc and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of persona l injury or death associated with such unintended or unauthorized use, even if such claim alleges that scillc was negligent regarding the design or manufacture o fthe part. scillc is an equal opportunity/affirmative action employer. this literature is subject to all applicable copyright laws a nd is not for resale in any manner. ps

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