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TC642B Datasheet PWM Fan Speed Controllers

Manufacturer: Microchip Technology

Overview: M TC642B/TC647B PWM Fan Speed Controllers With Minimum Fan Speed, Fan Restart and FanSense™ Technology for Fault.

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General Description

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.

Key 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 Protects Against Fan Failure and Aids System Testing.
  • Shutdown Mode for "Green" Systems.
  • Supports Low Cost NTC/PTC Thermistors.
  • Over-Temperature Indication (TC642B only).

More Datasheets from Microchip Technology

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