PWM Fan Speed Controllers With Auto-Shutdown, Fan Restart And FanSense? Technology For Fault Detection

TC646B The TC646B TC648B TC649B devices are new ver- sions of the existing TC646 TC648 TC649 fan speed controllers. These devices are switch-mode fan speed controllers that incorporate a new fan auto-restart func- tion. Temperature-proportional speed control is accom- plished using pulse width modulation. A thermistor (or other voltage output temperature sensor) connected to the V input supplies the required control voltage of IN 1.20V to 2.60V (typical) for 0% to 100% PWM duty cycle. The auto-shutdown threshold/temperature is set by a simple resistor divider on the V input. An inte- AS grated Start-Up Timer ensures reliable fan motor start- up at turn-on, coming out of shutdown mode, auto- shutdown mode or following a transient fault. A Logic low applied to V (pin 1) causes fan shutdown. IN By Microchip Technology Inc.
TC646B 's PackagesTC646B 's pdf datasheet

TC646B Pinout, Pinouts
TC646B pinout,Pin out
This is one package pinout of TC646B,If you need more pinouts please download TC646B's pdf datasheet.

TC646B Application circuits
TC646B circuits
This is one application circuit of TC646B,If you need more circuits,please download TC646B's pdf datasheet.

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