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Motor Driver/Controller, PWM, 3V to 5.5V supply, 4.4V/5 mA/1 Output, MSOP-8

TC647BEUA - Motor Driver/Controller, PWM, 3V to 5.5V supply, 4.4V/5 mA/1 Output, MSOP-8

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TC647BEUA   Datasheet
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Product Overview

The TC647BEUA is a switch mode PWM Fan Speed Controller with fan restart and FanSense™ technology for fault detection. Temperature-proportional speed control is accomplished using pulse width modulation. A thermistor connected to the VIN input supplies the required control voltage of 1.2 to 2.6V typical for 0 to 100% PWM duty cycle. Minimum fan speed is set by a simple resistor divider on the VMIN input. An integrated Start-Up Timer ensures reliable motor start-up at turn-ON, coming out of shutdown mode or following a transient fault. A logic-low applied to VMIN causes fan shutdown. The TC647B also feature Microchip Technology's proprietary FanSense™ technology for increasing system reliability. In normal fan operation, a pulse train is present at SENSE. A missing-pulse detector monitors this pin during fan operation. A stalled, open or unconnected fan causes the TC647B device to turn the VOUT output on full. If the fault persists, the FAULT output goes low.
  • Temperature proportional fan speed for acoustic noise reduction and longer fan life
  • Efficient PWM fan drive
  • FanSense™ Fault detection circuit protects against fan failure and aids system testing
  • Shutdown mode for green systems
  • Supports NTC/PTC thermistors
  • Fan auto-restart


Wireless, Sensing & Instrumentation, Medical

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Technical Docs (3)

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