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TC646 - PWM Fan Speed Controller

General Description

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).

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 TC646 Supply Voltage - Supports any Fan Voltage.
  • FanSense™ Fault Detection Circuits Protect Against Fan Failure and Aid System Testing.
  • Shutdown Mode for "Green" Systems.
  • Supports Low Cost NTC/PTC Thermistors.
  • Space Saving 8-Pin MSOP Package.
  • Over-temperature Indicatio.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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M 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 TC646 Supply Voltage - Supports any Fan Voltage • FanSense™ Fault Detection Circuits Protect Against Fan Failure and Aid System Testing • Shutdown Mode for "Green" Systems • Supports Low Cost NTC/PTC Thermistors • Space Saving 8-Pin MSOP Package • Over-temperature Indication TC646 Package Types SOIC/PDIP/MSOP VIN CF VAS GND 1 2 3 4 8 VDD VOUT FAULT SENSE PWM Fan Speed Controller with Auto-Shutdown and FanSense™ Technology TC646 7 6 5 General Description The TC646 is a switch mode, fan speed controller for use with brushless DC fans.