UNISONIC TECHNOLOGIES CO., LTD

F2867

Advance

LINEAR INTEGRATED CIRCUIT

www.unisonic.com.tw

1 of 6

Copyright © 2016 Unisonic Technologies Co., Ltd

QW-R109-038.a

VARIABLE SPEED

SINGLE-PHASE FULL-WAVE

PRE-DRIVER



DESCRIPTION

The UTC F2867 is a single-phase bipolar variable speed driving

motor pre-driver that works with external PWM signal. A highly

efficient, highly silent and low power consumption motor driver

circuit can be achieved with a few external parts. This product is

optimal for driving large scale fan motors requiring large air flow

and large current such as servers and consumer appliances.



FEATURES

* Pre-driver for single-phase full-wave drive

Low-saturation drive using external PMOS-NMOS enables

high-efficiency low power-consumption drive.

* External PWM input enabling variable speed control

Separately-excited upper direct PWM (f=30kHz) control method

enabling highly silent speed control.

* Current limiting circuit incorporated

Chopper type current limit at start.

* Reactive current cut circuit incorporated

Reactive current before phase change is cut to enable silent and

low power-consumption drive.

* Minimum speed setting pin

Minimum speed can be set by set with external resistor.

* Soft start setting pin

* Lock protection and automatic reset functions incorporated

* FG (rotation speed detection) output

* Thermal shutdown circuit incorporated

TSSOP-16



ORDERING INFORMATION

Ordering Number

Package

Packing

F2867G-P16-R

TSSOP-16

Tape Reel