TC646 controller equivalent, pwm fan speed controller.
* Temperature Proportional Fan Speed for Acoustic Control and Longer Fan Life
* Efficient PWM Fan Drive
* 3.0V to 5.5V Supply Range: - Fan Voltage Independent.
, for more information and system design guidelines. The TC646 is available in the 8-pin plastic DIP, SOIC and MSOP pack.
The TC646 is a switch mode, fan speed controller for use with brushless DC fans. Temperature proportional speed control is accomplished using pulse width modulation (PWM). A thermistor (or other voltage output temperature sensor) connected to the VIN.
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