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Ordering number:EN2576B
Monolithic Digital IC
LB1644
Dual Bidirectional Motor Driver
Overview
The LB1644 is a dual bidirectional motor driver. Since each channel has a 2-input logic circuit and performs bidirectional driving and braking functions, it is capable of direct driving 2pcs. of motor of various types rated at 6 to 24V. The output voltage can be varied by using external zener diodes. It is especially suited for dual motor drive (reel motor, loading motor, cassette motor in VCR) and for stepping motor drive.
Package Dimensions
unit:mm 3054A-DIP16F
[LB1644]
Features
* With power transistors for motor drive contained, capable of withstanding dash current of 1A max. * Performs braking function at the motor stop mode. * Contains elements to absorb motor dash current. * Input interfaceable to MOS LSI. * Minimum number of external parts required. * Wide operating voltage range. * Contains thermal shutdown protector.
SANYO : DIP16F
Specifications
Absolute Maximum Ratings at Ta = 25C
Parameter Maximum supply voltage Input voltage Output current Allowable power dissipation Operating temperature Storage temperature Symbol VCC max VIN IOUT Pd max Topr Tstg Conditions Ratings 25 25 1 1.44 -25 to +65 -55 to +125 Unit V V A W
C C
Allowable Operating Conditions at Ta = 25C
Parameter Supply voltage Symbol VCC Conditions Ratings 7 to +25 Unit V
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, aircraft's 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.
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquaters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
82098HA (KT)/N3093TS/3251TS/6257KI, TS No.2576-1/5
LB1644
Electrical Characteristics at Ta = 25C
Parameter Current drain Output leakage current Input threshold voltage Output voltage Output tr saturation voltage (upper) Output tr saturation voltage (lower) Symbol ICC1 ICC2 IOL Vth VO Vsat1 Vsat2 Conditions Pin1, Braking mode, RL= Pin9, Braking mode, RL= Braking mode, RL= per output pin RL= RL=60, VZ=7.4V IOUT=300mA IOUT=500mA IOUT=300mA IOUT=500mA 0.9 6.5 Ratings min typ 8.0 7.0 40 1.05 7.2 1.9 2.0 0.3 0.5 max 11.5 10.0 120 1.20 7.5 2.3 2.4 0.55 0.7 Unit mA mA A V V V V V V
Test Circuits (per channel)
No.2576-2/5
LB1644
Equivalent Circuit Block Diagram
Truth Table of Logic Circuit
Note : A capacitor of 0.01F or greater must be connected across VCC1, 2 and GND.
INPUT IN1 0 1 0 1 0 1 IN2, 3 0 0 1 1 0 1 IN4 0 0 1 0 1 1 L H L L L L OUTPUT OUT1 OUT2 OUT3 OUT4 L L H L L L L L L H L L L L L L H L Braking Forward/reverse Reverse/forward Braking Braking Braking M1 Braking Braking Braking Forward/reverse Reverse/forward Braking MODE M2
The remaining input states 1, 0, 1 and 0, 1, 0 are not inhibited.
No.2576-3/5
LB1644
Sample Application Circuit
No.2576-4/5
LB1644
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 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's 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 and all SANYO products described or contained herein fall under strategic products (including services) controlled under the Foreign Exchange and Foreign Trade Control Law of Japan, such products must not be exported without obtaining export license from the Ministry of International Trade and Industry 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.
This catalog provides information as of August, 1998. Specifications and information herein are subject to change without notice.
PS No.2576-5/5

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