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TC648 Datasheet Fan Speed Controller

Manufacturer: Microchip Technology

Overview: M.

General Description

The TC648 is a switch mode, fan speed controller for use with brushless DC fans.

Temperature proportional speed control is acplished using pulse width modulation (PWM).

A thermistor (or other voltage output temperature sensor) connected to the VIN input furnishes the required control voltage of 1.25V to 2.65V (typical) for 0% to 100% PWM duty cycle.

Key Features

  • 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 of TC648 Supply Voltage - Supports any Fan Voltage.
  • Over-temperature Fault Detection.
  • Automatic Shutdown Mode for “Green” Systems.
  • Supports Low Cost NTC/PTC Thermistors.
  • Space Saving 8-Pin MSOP Package TC648 Package Types SOIC/PDIP/MSOP VIN CF VAS GND 1 2 3 4 8 7 VDD VOUT OTF NC.

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TC648 Distributor