specifications of any and all sanyo semiconductor co.,l td. 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 customer ' s 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 customer ' sproductsor equipment. any and all sanyo semiconductor co.,ltd. products described or contained herein are, with regard to "standard application", intended for the use as general electronics equipment (home appliances, av equipment, communication device, office equipment, industrial equ ipment etc.). the products mentioned herein shall not be intended for use for any "special application" (medica l equipment whose purpose is to sustain life, aerospace instrument, nuclear control device, burning appliances, t ransportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level of re liability and can directly threaten human lives in case of failure or malfunction of the product or may cause har m to human bodies, nor shall they grant any guarantee thereof. if you should intend to use our products for app lications outside the standard applications of our customer who is considering such use and/or outside the scope of our intended standard applications, please consult with us prior to the intended use. if there is n o consultation or inquiry before the intended use, our customer shall be solely responsible for the use. 21209 ms/82599th(ii)/21097ha(ii)/o 1596ha(ii)/4302ts(us ) no.3949-1/5 LB1838M overview the LB1838M is a low-saturation two-channel bidirectional motor driver ic for use in low-voltage applications. the LB1838M is a bipolar stepper-motor driver ic that is id eal for use in printers, cameras and other portable devices. functions ? low voltage operation (2.5v min) ? low saturation voltage (upper transistor + lowe r transistor residual voltage: 0.40v at 400ma) ? built-in through-current prevention circuit ? separate logic power supply and motor power supply ? built-in spark killer diodes ? built-in thermal shutdown circuit ? compact package: mfp14s specifications absolute maximum ratings at ta = 25 c parameter symbol conditions ratings unit v cc max -0.3 to +10.5 v maximum supply voltage v s max -0.3 to +10.5 v output applied voltage v out v s +v sf v input applied voltage v in -0.3 to +10 v ground pin flow-out current i gnd per channel 1.0 a independent ic 550 mw allowable power dissipation pd max mounted on a specified board * 800 mw operating temperature topr -20 to +75 c storage temperature tstg -40 to +125 c * specified board: 20mm 30mm 1.6mm, glass epoxy board. orderin g numbe r : en3949e monolithic digital ic low-voltage, low-saturation bidirectional motor driver
LB1838M no.3949-2/5 allowable operating ranges at ta = 25 c parameter symbol conditions ratings unit v cc 2.5 to 9.0 vv supply voltage v s 1.8 to 9.0 v input high-level voltage v ih 1.8 to 9.0 v input low-level voltage v il -0.3 to +0.7 v electrical characteristics at ta = 25 c, v cc = 3v ratings parameter symbol conditions min typ max unit i cc 0 ena1,2 = 0v, v in 1 = 3v or 0v 0.1 10 a current drain i cc 1 ena1 = 3v, v in 1 = 3v or 0v 12 18 ma v out 1 ena = 3v, v in = 3v or 0v, i out = 200ma 0.2 0.28 v output saturation voltage v out 2 ena = 3v, v in = 3v or 0v, i out = 400ma 0.4 0.6 v i in v cc = 6v, v in = 6v 200 a input current i ena v cc = 6v, ena = 6v 200 a output sustaining voltage v o (sus) i out = 400ma 9 v spark killer diode reverse current i s (leak) v cc 1, v s = 7v 30 a forward voltage v sf i out = 400ma 1.7 v package dimensions unit : mm (typ) 3111a pin assignment 1 v cc 2 ena1 3 out1 4 v s 1 5 out2 6 in1 7 gnd 8 vcont 14 13 12 11 10 9 gnd ena2 out3 v s 2 out4 in2 LB1838M note: both gnd pins should be connected to ground. sanyo : mfp14s(225mil) 1 14 7 8 8.0 0.15 (1.0) 1.0 0.35 1.7max (1.5) 0.1 4.4 0.63 6.4 -20 0 20 40 60 80 100 0 1000 800 600 400 200 pd max -- ta 550 330 480 ambient temperature, ta -- c allowable power dissipation, pd max -- mw independent ic with specified board specified board: 20 301.5mm 3 glass epoxy board.
LB1838M no.3949-3/5 vcont in out out m i d v z v cc v s i d = v z r 300? ( = constant) block diagram v cc out3 v s 1 out4 gnd vcont gnd ena2 v s 2 in2 60k? 80k? 60k? 80k? out1 out2 ena1 in1 60k? 80k? 60k? 80k? stepping motor 10f control block control block thermal shutdown note: as long as the voltages applied to v cc , v s 1, v s 2, ena1, ena2, in1, and in2 are within the limits set by the absolute maximum ratings, there are no restrictions on the relationship of each voltage level in comparison with the others (regarding which is higher or lower). (ex. v cc = 3v, v s 1, 2 = 2v, ena = in = 5v) truth table in1,2 ena1,2 out1,3 out2,4 mode l h h l forward h h l h reverse l l off off standby h l off off standby vcont pin as shown in the left diagram, the vcont pin outputs the voltage of the band gap zener v z +v f (= 1.93v). in normal use, this pin is left open. the drive current i d is varied by the vcont voltage. however, because the band gap zener is sh ared, it functions as a bridge.
LB1838M no.3949-4/5 v o (sat) -- i o i in -- v in v o (sat) -- ta i s -- v s i cc -- v cc 1.0 0.8 0.6 0.4 0.2 0 200 160 120 80 40 0 0.6 0.5 0.3 0.2 0.1 0 0.4 20 16 12 8 4 0 10 8 6 4 2 0 0 100 200 300 400 500 600 012345678910 -40 -20 0 20 40 60 140 120 10080 01 23 7 65 4812 11 109 01 23 7 65 481 2 11 109 ena in1(ena = 3v) i o = 400ma i o = 200ma v cc = v s = 3v v cc = v s = in = 3v v o (sat) = total v cc = v in = 3v for 1channel v cc = v in = 3v for 1channel output current, i o -- ma output saturation voltage, v o (sat) -- v input voltage, v in -- v input current, i in -- a output saturation voltage, v o (sat) -- v ambient temperature, ta -- c current drain, i s -- ma supply voltage, v s -- v current drain, i cc -- ma supply voltage, v cc -- v reverse forward
LB1838M ps no.3949-5/5 sanyo semiconductor co.,ltd. assumes no responsib ility for equipment failures that result from using products at values that exceed, even momentarily, rate d values (such as maximum ra tings, operating condition ranges, or other parameters) listed in products specif ications of any and all sanyo semiconductor co.,ltd. products described or contained herein. sanyo semiconductor co.,ltd. strives to supply high-qual ity high-reliability products, however, any and all semiconductor products fail or malfunction with some probability. it is possible that these probabilistic failures or malfunction could give rise to acci dents or events that could endanger human lives, trouble that could give rise to smoke or fire, or accidents that could cause dam age to other property. when designing equipment, adopt safety measures so that these kinds of accidents or e vents cannot occur. such measures include but are not limited to protective circuits and error prevention c ircuits for safe design, redundant design, and structural design. upon using the technical information or products descri bed herein, neither warranty nor license shall be granted with regard to intellectual property rights or any other rights of sanyo semiconductor co.,ltd. or any third party. sanyo semiconductor co.,ltd. shall not be liable f or any claim or suits with regard to a third party's intellctual property rights which has resulted from the use of the technical information and products mentioned above. information (including circuit diagr ams and circuit parameters) herein is for example only; it is not guaranteed for volume production. any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. when designing equi pment, refer to the "delivery specification" for the sanyo semiconductor co.,ltd. product that you intend to use. in the event that any or all sanyo semiconductor c o.,ltd. products described or contained herein are controlled under any of applicable local export control laws and regulations, such products may require the export license from the authorities conc erned 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 in formation storage or retrieval system, or otherwise, without the prior written consent of sanyo semiconductor co.,ltd. this catalog provides information as of july, 2008. specifications and informat ion herein are subject to change without notice.
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