Ordering number : ENN7099

71202RM (OT) No. 7099-1/12

Overview

The LB1929 is a three-phase brushless motor driver that is

optimal for driving the drum and paper feed motors in

laser printers and plain-paper copiers. It can provide drive

with minimal power loss due to direct PWM drive

technique, features on-chip peripheral circuits such as a

speed control circuit and an FG amplifier, and can

implement a drive circuit in a single chip.

Functions and Features

• Three-phase bipolar drive (30 V, 3.5 A)

• Direct PWM drive

• Built-in low side output kickback absorption diode

• Control technique that combines a speed discriminator

with PLL speed control

• Speed lock detection output

• Built-in forward/reverse switching circuit

• Full complement of built-in protection circuits,

including current limiter, thermal protection circuit, and

motor lockup protection circuit.

Package Dimensions

unit: mm

3147B-DIP28H

1

14

28

15

0.6

26.75

20.0

R1.7

(1.81)

1.78

1.0

SANYO: DIP-28H (500 mil)

[LB1929]

LB1929

SANYO Electric Co.,Ltd. Semiconductor Company

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

Three-Phase Brushless Motor Driver for OA Products

Monolithic Digital IC

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.

Parameter

Symbol

Conditions

Ratings

Unit

Supply voltage

30

V

Output current

T

≤ 500 ms

3.5

A

Allowable power dissipation 1

Pd max1

Independent IC

3

W

Allowable power dissipation 2

Pd max2

Infinitely large heat sink

20

W

Operating temperature

Topr

–20 to +80

°C

Storage temperature

Tstg

–55 to +150

°C

Specifications

Absolute Maximum Ratings at Ta = 25°C

Parameter

Symbol

Conditions

Ratings

Unit

Supply voltage range 1

9.5 to 28

V

Regulator-voltage output current

IREG

0 to –30

mA

LD output current

ILD

0 to 15

mA

Allowable Operating Range at Ta = 25°C