DESCRIPTION

The UTC F2867/D 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. UTC F2867/D-R is with RD option and UTC F2867/D-F

with FG.

 

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

* Thermal shutdown circuit incorporated

* F2867D: Enhanced CT discharge capability for improved

performance in low-speed fan applications

* FG (rotation speed detection) output (F2867-F/ F2867D-F)

* RD(latch-type lockup detection) output (F2867-R/ F2867D-R)