Sanyo LB1648 Specifications

Ordering number:EN3221A

Monolithic Digital IC

LB1648

Dual Bidirectional Motor Driver

Overview

The LB1648 is a dual bidirectional motor driver. It is
especially suited for reel motor in cassette deck.

Features

• 2-input logic can be used to exercise control of bidirec­tional driving, braking and open.

• Output voltage variable by use of external Zener diode.

• On-chip thermal protector.

Specifications

Absolute Maximum Ratings at Ta = 25˚C

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Package Dimensions

unit:mm

3022A-DIP12F

[LB1648]

SANYO : DIP12F

81V

8.0±A

˚C
˚C

Allowable Operating Conditions at Ta = 25˚C

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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

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquaters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

82098HA (KT)/7310TS/1220TA, TS No.3221-1/7

61+ot7V

LB1648

Electrical Characteristics at Ta = 25˚C, VCC=12V, per channel

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Equivalent Circuit Block Diagram

I

1CC

I

2CC

I

3CC

LO

RL=∞ 9.050.102.1V

ht

V

O

Z

I

1tas

2tas

Z

TUO

I

TUO

I

TUO

I

TUO

V

Z

R,drawrof1niP

= ,∞ VZV4=5122Am

L

R,drawrof7niP

= ,∞ VZV4=4102Am

L

R,nrepo7niP

=∞ 5.13Am

L

R,edomgnikarB

= ,∞ niptuptuorep04021Aµ

L

I,V4=

I,V4=

Am58=57.30.452.4V

TUO
Am002=9.13.2V

Am004=0.24.2V
Am002=3.055.0V
Am004=5.07.0V

Am0=55.058.051.1Am

TUO

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Logic Section Truth Table

Note : A capacitor of 0.01µF or grater must be connected across V

CC1, 2

and GND

No.3221-2/7

Sample Application Circuit

Test Circuit (1channel)

LB1648

No.3221-3/7

Internal Circuits Input Circuit

Output Circuit

LB1648

Circuit of Pin V

Z

No.3221-4/7

LB1648

Design Notes

1 : Maximum voltage, maximum current
A voltage greater than the supply voltage, 7 to 16V, specified in the Allowable Operating Conditions must not be
applied to pins 1 and 7. The maximum current is 0.8A (peak). The rush
current at the time of start must not exceed the peak current.

2 : Output transistor protection
A resistor (or for fuse resistor) must be connected to the
VCC line to provide protection against output short,
output pin-to-GND short.

3 : Wiring
The bypass capacitors connected across pins 1, 7 and GND must not have an impedance common to other lines,
The GND line must be separated from other circuits.

4 : Provision against oscillation
In applications where motors with brush are used, a capacitor may be connectd across both terminals to prevent
the spark-caused noise. This capacitor is connected across the output pins of the LB1648, which may cause
oscillation to occur. In this case, the capacitor value must be made as small as possible or a resistor must be
connected in series.

5 : External Zener diode
The current flowing out of the VZ pin varies with the load and its
maximum value is approximately 1.2mA.
If you use a Zener diode of soft clip type and need an accuracy in voltage, a
current required for the Zener diode must be supplied externally.

No.3221-5/7

LB1648

No.3221-6/7

LB1648

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.3221-7/7