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. 32207 ti pc b8-5899,7386 no.7231-1/7 LB1937T overview the LB1937T is a 2-phase bipolar drive stepping motor driver ic that supports low-voltage drive and can drive two stepping motors at the same time. the LB1937T's miniature package and minimal number of external components reduces the required mounting area. it also provid es high-efficiency motor drive and can re duce circuit current consumption. since it provides a current detection pin and supports pwm control input, it can be used to implement current chopper control at the system level. the LB1937T is optimal for the stepping motors used for lens drive in digital cameras, printers, and movie cameras. functions and features ? low saturation voltage forward/reverse motor driver (v o sat = 0.3v at i o = 200ma) ? four h-bridge channels ? wide usable voltage range (allowable voltage range: 2.5v to 9.5v, absolute maximum rating: 10.5v) ? supports pwm input (low power consumption can be achieved in slow delay mode that uses in1/in2 = h/h logic.) ? motor (coil) current detection pin ? built-in thermal shutdown circuit ? thin form factor mini ature package (tssop24) monolithic digital ic 1-2 phase excitation stepping motor driver orderin g numbe r : en7231
LB1937T no.7231-2/7 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 vs max -0.3 to +10.5 v maximum output voltage v out max vs+ vsf v input voltage v in max -0.3 to +8.0 v ground pin source current ignd max per channel 800 ma allowable power dissipation pd max when mounted on a circuit board * 1100 mw operating temperature topr -30 to +85 c storage temperature tstg -40 to +150 c * specified circuit board : 114.3 76.1 1.6mm 3 , glass epoxy allowable operating range at ta = 25 c parameter symbol conditions ratings unit v cc 2.5 to 9.5 supply voltage vs 2.5 to 9.5 v high-level input voltage v ih 2.0 to 7.5 v low-level input voltage v il -0.3 to 0.7 v electrical characteristics at ta = 25 c, v cc = vs = 5v ratings parameter symbol conditions min typ max unit i cc 0 in1 to in8 = 0v 0.1 5 a v cc system power supply current i cc 1 in1 = in3 = 3v 10 16 ma is0 in1 to in8 = 0v 0.1 5 a vs system power supply current is1 in1 = in3 = 3v 13 19 ma v out 1 v cc = vs = 3v to 7.5v, v in = 3v or 0v, i out = 200ma (high and low side) 0.3 0.4 v output saturation voltage v out 2 v cc = vs = 4v to 7.5v, v in = 3v or 0v, i out = 400ma (high and low side) 0.6 0.8 v input current i in v in = 5v 150 200 a spark killer diode reverse current is(leak) 30 a forward voltage vsf i out = 400ma 1.7 v
LB1937T no.7231-3/7 package dimensions unit:mm (typ) 3260a pin assignment sanyo : tssop24(225mil) 6.4 0.5 4.4 (0.5) (1.0) 6.5 0.5 0.15 1 12 24 13 0.22 0.08 1.2max 22 24 2 0 1 8 1 9 2 1 v cc 2 3 1 5 7 6 4 8 vs in1 in2 in3 in4 in8 out5 out4 p-gnd out1 top view 9 10 11 12 13 14 15 1 6 1 7 23 s - gnd in5 in6 in7 vs p - gnd out8 out7 out6 p - gnd out3 out2 (nc) LB1937T 0 1000 1100 600 200 400 800 1200 -40 - 30 10 0 80 60 20 -20 40 0 572.00 ambient temperature, ta ? c allowable power dissipation, pd max ? mw pd max ? ta mounted on the specified circuit board specified circuit board : 114.3 76.1 1.6mm 3 glass epoxy board
LB1937T no.7231-4/7 block diagram control block thermal shutdown s-gnd stepping motor 10 f v cc in1 in2 in3 in4 p-gnd vs out2 out1 vs out6 out5 in5 in6 in7 in8 out3 out4 stepping motor out7 out8 p-gnd 30k 30k 30k 30k 30k 30k 30k 30k 30k 30k 30k 30k 30k 30k 30k 30k 10 f LB1937T top view
LB1937T no.7231-5/7 truth table input output in1 in2 in3 in4 in5 in6 in7 in8 out1 out2 out3 out4 out5 out6 out7 out8 output mode l l off off (1) l h l h (2) h l h l (3) h h off h (4) (*) (*) h off (4) l l off off (5) l h l h (6) h l h l (7) h h off h (8) (*) (*) h off (8) l l off off (11) l h l h (12) h l h l (13) h h off h (14) (*) (*) h off (14) l l off off (15) l h l h (16) h l h l (17) h h off h (18) (*) (*) h off (18) l : low, h : high *: the output logic mode w hen in1/in2 = h/h is determined by the immediately preceding in1/in2 mode. the post-switching output modes will be as follows. when switching from (2): (4) when switching from (3): (4)' when switching from (1): undefined (either (4) or (4)') the modes when in3/in4 = h/h operat e similarly as described below. when switching from (6): (8) when switching from (7): (8)' when switching from (5): undefined (either (8) or (8)')
LB1937T no.7231-6/7 0 20 15 10 5 012345678910 0 20 15 10 5 01 23 4 5 6 78910 0 250 200 150 100 50 0.2 0.7 0.6 0.5 0.4 0.3 0123456789 0 25 20 15 10 5 -40 -20 0 20 40 60 80 100 120 140 -40 -20 0 20 40 60 80 100 120 140 0 15.0 10.0 12.5 7.5 2.5 5.0 0 0.50 0.75 0.25 -40 -20 0 20 40 60 80 100 120 140 0 100 200 400 300 500 supply voltage, v cc ? v supply voltage, v s ?v input voltage, v in ?v ambient temperature, ta ? c ambient temperature, ta ? c ambient temperature, ta ? c i cc -- v cc i s -- v s i cc -- ta i s -- ta i in -- v in v o (sat) -- i o v o (sat) -- ta supply current, i cc ?ma supply current, i cc ?ma output current, i o ?ma output saturation voltage, v o (sat) ?v output saturation voltage, v o (sat) ?v supply current, i s ?ma input current, i in ? a supply current, i s ?ma high and low side high and low side in1 to in8
LB1937T ps no.7231-7/7 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 probabi lity. 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 march, 2007. specifications and information herein are subject to change without notice.
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