ordering number : enn7391 93003tn (ot) no. 7391-1/6 overview the LB11651 is a full bridge driver that supports switching between forward and reverse directions. it operates in one of four modes under application control: forward, reverse, brake, and open. it also supports direct pwm control from an external signal. the LB11651 is optimal for driving brush dc motors and bipolar stepping motors. features ? supports pwm input ? built-in high and low side diodes ? simultaneous on state prevention function (prevents through currents) ? built-in thermal shutdown circuit (latching type) ? high and low side short circuit protection function (latching type overcurrent protection) ? externally controllable modes: forward, reverse, brake, open ? standby mode function package dimensions unit: mm 3113a-sip14hz 27.0 20.0 r1.7 0.5 1.94 8.4 7.8 14.5max 14 1 0.4 11.8 5.2 4.6 1.6 2.2 4.0 1.78 3.56 3.56 sanyo: sip14hz [LB11651] LB11651 sanyo electric co.,ltd. semiconductor company tokyo office tokyo bldg., 1-10, 1 chome, ueno, taito-ku, tokyo, 110-8534 japan pwm input forward/reverse motor driver monolithic digital ic any and all sanyo products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircrafts control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. consult with your sanyo representative nearest you before using any sanyo products described or contained herein in such applications. sanyo assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all sanyo products described or contained herein. parameter symbol conditions ratings unit motor supply voltage vm max 30 v peak output current i o peak tw 10 s 4.0 a continuous output current i o max 3.0 a logic system supply voltage v cc max 7.0 v allowable power dissipation pd max when mounted on a glass epoxy circuit board 3.5 w (reference value): 114.3 mm 76.1 mm 1.6 mm operating temperature topr C20 to +85 c storage temperature tstg C55 to +150 c specifications absolute maximum ratings at ta = 25c
no. 7391- 2 /6 LB11651 parameter symbol conditions ratings unit motor supply voltage vm 8 to 28 v logic system supply voltage v cc 3.0 to 5.25 v logic input voltage range v in C0.3 to v cc v recommended operating ranges at ta = 25 c parameter symbol conditions ratings unit min typ max [output block] output stage supply current 1 im on with no load, st = high 0.84 1.2 1.56 ma output stage supply current 2 im wt with no load, st = low 50 a output saturation voltage 1 v o sat1 i o = +1.0 a, sink side 0.4 0.6 v output saturation voltage 2 v o sat2 i o = +2.0 a, sink side 0.6 0.9 v output saturation voltage 3 v o sat3 i o = C1.0 a, source side 1.6 1.9 v output saturation voltage 4 v o sat4 i o = C2.0 a, source side 1.8 2.1 v output leakage current i o leak v o = vm, sink side 50 a v o = 0 v, source side C50 a [logic block] v cc = 5 v, with the r pin open 80 110 140 ma i cc on brake: low, pwm: hi, st: hi v cc = 3.3 v, with the r pin shorted to v cc 95 125 155 ma logic supply current brake: low, pwm: hi, st: hi i cc br brake: hi, pwm: hi, st: hi 3.4 4.7 6.0 ma i cc off brake: low, pwm: low, st: hi 4.0 5.2 6.5 ma i cc wt st: low 50 a input voltage vinh 2.0 v vinl 0.8 v input current iinh v in = 3.3 v 35 50 75 a iinl v in = 0.8 v 5 10 13 a c pin charge current ic vc = 0 v 35 50 65 a c pin output off threshold voltage vtc 1.17 1.3 1.43 v vhs pin current detection vtvhs vm C 0.55 vm C 0.5 vm C 0.45 v threshold voltage vls pin current detection vtvls 0.45 0.5 0.55 v threshold voltage low voltage cutoff voltage vlvsd 2.25 2.5 2.75 v low voltage cutoff hysteresis vlvhys 0.15 0.2 0.25 v thermal shutdown temperature ttsd design target value * 150 175 c electrical characteristics at ta = 25 c, vm = 24 v, v cc = 5 v * : this is a design target value and is not measured. pd max ta 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 20 0 20 40 60 80 85 100 allowable power dissipation, pdmax w ambient temperature, ta c ilb01548 specified circuit board: 114.3 76.1 1.6 mm glass epoxy resin
pin assignment no. 7391- 3 /6 LB11651 oa 1 2 3 4 5 6 7 8 9 10 11 12 13 14 top view vls vm vhs v cc st c pwm phase brake gnd r dignd ob LB11651 truth table x: h or l phase brake st pwm oa ob operating mode h l h h h l forward l l h h l h reverse x l h l off off output off x h h x h h brake x x l or open x off off standby mode (circuits off) pin functions pin no. pin pin function 1 oa output 14 ob output 4 vhs high side current sensing (insert an external resistor between vm and vhs. when the voltage across this resistor reaches 0.5 v, the outputs are turned off.) 2 vls low side current sensing (insert an external resistor between vls and ground. when the voltage across this resistor reaches 0.5 v, the outputs are turned off.) 7 c connection for an external filter capacitor that prevents incorrect operation of the current sensing output shutdown and therma l shutdown circuits. 3 vm motor system power supply 5 v cc logic system power supply 9 phase forward/reverse switching pin 10 brake brake control input. a high input switches the ic to brake mode. 6 st standby mode control. the ic operates in standby mode when this pin is low or open. 8 pwm pwm input. high: on low: off 12 r low side drive current switching. (short r to v cc when v cc is 3.3 v, and leave r open when v cc = 5.0 v.) 11 gnd ground 13 dignd lower side regeneration diode ground connection
no. 7391- 4 /6 LB11651 high/low short protection function this function turns the outputs off to prevent destruction of the ic if a problem such as an output pin being shorted to vm or ground occurs and excessive current flows in the output transistors. when an excessive current flows in an output transistor, a potential will occur across either the high side or the low side current sense resistor. if that value exceeds the current detection threshold voltage, the capacitor connected to the c pin starts to charge. then, when the c pin voltage is charged to the output off threshold voltage, the output transistors are turned off. to restart the ic once it has gone to the output off state, either set the st pin to the low level, or temporarily cut the v cc power supply, and then reapply power. the overcurrent detection current setting can be set to an arbitrary level with the resistor inserted between vm and vhs for current flowing in the high side output transistor, and with the resistor inserted between vls and ground for current flowing in the low side output transistor. when the resistor connected to vhs or vls pin is r ( ), the detected current i (a) will be as follows. i (a) = 0.5 (v) / r ( ) for example, if r is 0.25 , the detected current i will be 2 a. this function is not an output current limiter function. the detection current described above has the meaning that the short-circuit protection circuit begins to operate when a current in excess of the detection current flows in the outputs. therefore, if an output pin is shorted to vm or ground, the maximum possible overcurrent that the output transistors are capable of will flow until the mask time set with the filter circuit has elapsed. designers must exert great care in designing the mask time setting. filter circuit to prevent the overcurrent protection and thermal shutdown circuits from operating incorrectly due to noise, the LB11651 includes a circuit that sets a mask time so that when an abnormality is detected, it only turns the outputs off if that state continues for a certain length of time. when the capacitor connected between the c pin and ground is c (pf), the mask time t ( s) will be as follows. t ( s) = 2.6 10 C2 c (pf) for example, if c is 50 pf, the mask time t will be 1.3 s. low side transistor drive current switching pin since the lower side output transistor drive current is created from v cc , if the v cc power supply level is reduced, the drive current will also be reduced. therefore, the LB11651 is provided with a pin for switching the drive current so that the LB11651 can provide the same drive current when used with 3.3 v specifications as it does when used with 5 v specifications. when v cc = 5 v: leave the r pin open. when v cc = 3.3 v: short the r pin to v cc .
block diagram no. 7391- 5 /6 LB11651 r control logic circuit pwm phase st brake vm oa ob c gnd vls thermal shutdown circuit uvlo vref circuit filter circuit v cc vhs latch circuit dignd m v cc = 5 v sw open v cc = 3.3 v sw on 12 6 10 9 8 5 11 7 2 13 4 3 14 1
ps no. 7391- 6 /6 LB11651 this catalog provides information as of september, 2003. specifications and information herein are subject to change without notice. specifications of any and all sanyo products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customers products or equipment. to verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customers products or equipment. sanyo electric co., ltd. strives to supply high-quality high-reliability products. however, any and all semiconductor products fail with some probability. it is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or that could cause damage to other property. when designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. in the event that any or all sanyo products (including technical data, services) described or contained herein are controlled under any of applicable local export control laws and regulations, such products must not be exported without obtaining the export license from the authorities concerned in accordance with the above law. no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written permission of sanyo electric co., ltd. any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. when designing equipment, refer to the delivery specification for the sanyo product that you intend to use. information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. sanyo believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties.
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