ROHM BA6427F Datasheet

Motor driver ICs

Single-phase full-wave motor driver

BA6427F

The BA6427F is a single-phase full-wave motor driver for fan motors. By using this driver, a single-phase, full-wave motor
driver circuit can be built with fewer components than a circuit using operational amplifiers. Lock detection and automatic
restart mechanisms, which are required for fan motors, are also built in. A rotational-speed sensing output pin is provided
for Ho output.

Applications
Single-phase, full-wave fan motors

Features

1) Equipped with lock detection and rotational-speed
sensing functions.

2) Compact SOP-8 package reduces the number of ex­ternal components for a reduced mounting area.

Absolute maximum ratings (Ta = 25C)

3) Automatic restart when the motor lock is undone.

Recommended operating conditions

763

Motor driver ICs BA6427F

Block diagram

Pin descriptions

Truth table

764