TC647B Overview
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 acplished using pulse width modulation.
TC647B 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
- Shutdown Mode for "Green" Systems
- Supports Low Cost NTC/PTC Thermistors
- Over-Temperature Indication (TC642B only)
- Fan Auto-Restart