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.

Ordering number : ENN5687B

73099TH (OT)/83097HA(OT) No. 5687-1/11

Overview

The LB1924 is a direct PWM drive output driver IC

appropriate for the power brushless motors used in office

automation equipment. It includes a speed control circuit,

an FG amplifier, and other peripheral circuits and allows a

drive circuit to be implemented with a single IC. It allows

the number of external components to be reduced by

including a lock protection circuit, a kickback absorption

diode for the lower output side, and other components on

chip.

Functions

• Breakdown voltage: 30 V, output current: 3.1 A

• Direct PWM drive output

• Speed discriminator + PLL speed control technique

• Crystal oscillator circuit

• Built-in FG and integrating amplifiers

• Forward/reverse switching circuit

• Speed lock detection output

• On-chip lower output side kickback absorption diode

• Full complement of built-in protection circuits,

including lock protection, current limiter, and thermal

protection circuits

Package Dimension

unit: mm

3147B-DIP28H

1

14

28

15

0.6

27.0

20.0

R1.7

1.93

1.78

1.0

SANYO: DIP28H

[LB1924]

LB1924

SANYO Electric Co.,Ltd. Semiconductor Company

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

Power Brushless Motor Driver IC for Office

Automation Equipment

Monolithic Digital IC