Microchip TC642COA Fan Controller IC 8-Pin, SOIC

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Unavailable
RS will no longer stock this product.
Packaging Options:
RS Stock No.:
177-9869
Mfr. Part No.:
TC642COA
Brand:
Microchip
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Brand

Microchip

Output Configuration

PWM

Maximum Supply Voltage

5.5 V

Mounting Type

Surface Mount

Package Type

SOIC

Maximum Operating Supply Voltage

5.5 V

Pin Count

8

Minimum Operating Supply Voltage

3 V

Typical Switching Frequency

30 (PWM)Hz

Series

TC642

Minimum Operating Temperature

0 °C

Dimensions

5 x 3.99 x 1.55mm

Product Width

3.99mm

Length

5mm

Maximum Operating Temperature

+70 °C

Product Height

1.55mm

Width

3.99mm

Height

1.55mm

Product Length

5mm

The TC642 is a switch mode fan speed controller for use with brushless DC motors. Temperature proportional speed control is accomplished using pulse width modulation. A thermistor (or other voltage output temperature sensor) connected to the VIN input furnishes the required control voltage of 1.25Vto 2.65V (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, pin 3, causes fan shutdown.

Temperature Proportional
Fan Speed for Acoustic Control and Longer Fan Life
Efficient PWM Fan Drive
3.0V 5.5V Supply Range
Fan Voltage Independent of TC642 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