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 TC646B/TC648B/TC649B Supply Voltage

- Supports any Fan Voltage

• FanSense™Fault Detection Circuit Protects Against Fan Failure and Aids System Testing(TC646B/TC649B)

• Automatic Shutdown Mode for “Green” Systems

• Supports Low Cost NTC/PTC Thermistors

• Over-Temperature Indication (TC646B/TC648B)

• Fan Auto-Restart

• Space-Saving 8-Pin MSOP Package