Single Coil Brushless DC Motor Drivers with Soft-Switching and PWM control( 2.0 to 6.5 Volts )

Version

：A.005

Page

：1

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FD178/FD178B/FD178C

General Specifications

The device is a single coil DC brushless motor driver IC with soft-switch, PWM

control, locked protection, thermal shut down protection circuit, power polarity reverse

protection, frequency generator FG output for FD178, FG/2 output for FD178B, and

rotating detector RD output for FD178C. The driver is optimal for single coil fan

applications with less external components.

Features and Benefits

Support single-phase full wave Brushless DC Motor Driver

Built-in Hall sensor input signal amplifier

PWM control circuit

Low voltage startup (VDD=2.0V)

High driving capability

Lock detection and automatic self-restart

Power polarity reverse protection

Thermal shut down protection circuit

Thin, compact, highly reliable package (TSOT-28)

Pin Description

FD178/FD178B/FD178C：TSOT-28

Package : TSOT-28

NO.

NAME

DESCRIPTION

1

O1

Output driving & sinking pin 1

2

VSS

Ground pin

3

FGR

Frequency generator or rotating detector

FD178：FG

FD178B：FG/2

FD178C：RD

4

HP

Hall sensor in+

5

HN

Hall sensor in-

6

PWM

PWM control pin

7

VDD

Power supply pin

8

O2

Output driving & sinking pin 2