Overview

The LB1921 is a single-chip motor driver circuit that

provides direct PWM drive output appropriate for driving

the power brushless motors used in office automation

equipment. The LB1921 also provides a variety of

peripheral functions, including speed control and FG

amplifier circuits, on chip.

Applications

• Paper feed and drum motor drivers in FAX and PPC

units

Functions and Features

• The LB1921 is an improved output current version of

the LB1824.

• Three-phase bipolar brushless motor driver

• Digital speed control circuit

• Thermal shutdown circuit

• Start/stop pin

• Lock detector output

• Crystal oscillator and divider circuits

• FG and error amplifiers

• Power supply current limiter

Package Dimensions

unit: mm

3147A-DIP28HS

Monolithic Digital IC

53096HA (OT) No. 5439-1/10

SANYO: DIP28HS

[LB1921]

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

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

Three-Phase Brushless Motor Driver

for OA Applications

LB1921

Ordering number : EN5439