TC642B Datasheet (Microchip) - PWM Fan Speed Controllers

TC642B, PWM Fan Speed Controllers

The TC642B/TC647B devices are new versions of the existing TC642/TC647 fan speed controllers.

These devices are switch mode, fan speed controllers that incorporate a new fan auto-restart function.

Temperature-proportional speed control is accomplished using pulse width modulation.

A thermistor (or o

TC642B Features

* Temperature-Proportional Fan Speed for Acoustic Noise Reduction and Longer Fan Life

* Efficient PWM Fan Drive

* 3.0V to 5.5V Supply Range: - Fan Voltage Independent of TC642B/TC647B Supply Voltage - Supports any Fan Voltage

* FanSense™ Fault Detection Circuit Protec