Ordering number:EN3664A
Monolithic Digital IC
LB1657M
2-Phase Stepping Motor Driver
Overview
The LB1657M is a dual bridge driver IC suited for use in
2-phase bipolar stepping motor driver for FDD (3 to 5.25
inches) head actuator.
The maximum driver current×voltage is 0.33A×12V/
bridge.
Features
• Power save function.
• ø1, ø2 direction inputs are used to make driver output
selection.
• Low saturation voltage.
• Low current drain.
• Direct controllable from MPU due to low input current.
• Input level : TTL, LSTTL, 5V CMOS compatible.
• On-chip thermal shutdown (TSD) circuit.
Specifications
Absolute Maximum Ratings at Ta = 25˚C
retemaraPlobmySsnoitidnoCsgnitaRtinU
egatlovylppusnoitcescigoLV
egatlovylppusgnikeeSV
egatlovtupnIV
tnerrucgnikeeskaePI
tnerrucgnikeessuounitnoCI
noitapissidrewopelbawollAxamdP 9.0W
erutarepmetgnitarepOrpoT 07ot02–
erutarepmetegarotSgtsT 521+ot55–
CC
S
NI
kaept≤ sm5 005Am
O
SO
Package Dimensions
unit:mm
3097-MFP16FS
[LB1657M]
SANYO : DMFP16FS
7V
51V
Vot0
CC
033Am
˚C
˚C
V
Allowable Operating Conditions at Ta = 25˚C
retemaraPlobmySsnoitidnoC
egatlovylppusnoitcescigoLV
egatlovylppusgnikeeSV
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.
CC
S
nimpytxam
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquaters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
82098HA (KT)/5231TS (KOTO)/5310TA (KOTO) No.3664-1/4
sgnitaR
5.40.55.5V
2.010.218.31V
tinU
LB1657M
Electrical Characteristics at Ta = 25˚C, VCC=5V, VS2=5V, VS1=12V
retemaraPlobmySsnoitidnoC
egatlovlevel-woltupnIV
egatlovlevel-hgihtupnIV
tnerruclevel-woltupnII
tnerruclevel-hgihtupnII
niardtnerruCI
egatlovrotsisnarttuptuOV
V
1S
emityaleD
egatlovnoitarutasV
egatlovpmalCV
erutarepmetgnitarepoDSTDST 051
siseretsyhDST ∆T 52
Note : 1. Measure sum of currents at pins 4 and 13.
2. Measure sum of saturation voltages at upper and lower level.
LI
HI
VIV8.0=01–01+Aµ
LI
VIV2=601Aµ
HI
VIV5=55.00.1Am
LC
I
LS
I
HC
I
HS
I
REC
C
tas
I
F
F
I
t
t
F
HLP
LHP
V,V8.0=BTS
CC
V,V8.0=BTS
1etoN,1Am
S
V,V0.2=BTS
CC
V,V0.2=BTS
1etoN,501Am
S
Am01=81V
I,V8.0=BS
O
reppu,Am033=3V
rewol,Am033=5.1V
2etoN,Am033=5.10.2V
sgnitaR
nimpytxam
0.2V
5233Am
5233Am
4sµ
2sµ
tinU
8.0V
˚C
˚C
Equivalent Circuit Block Diagram
The ø1, ø2 direction inputs are used to make driver output selection and the power
save input is used to select the driver source output from between 0V supply and
12V supply.
No.3664-2/4
LB1657M
Pin Assignment Specified board
(Top view)
Sample Application Circuit : 2-phase bipolar stepping motor driver.
Note : Keep the tarminal to short 4 and 13
Timing Chart
No.3664-3/4
LB1657M
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.3664-4/4
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