TC646 Datasheet PWM Fan Speed Controller

Manufacturer: Microchip Technology

TC646 pwm fan speed controller by Microchip Technology - Datasheet Preview

Datasheet Details

Part number	TC646
Manufacturer	Microchip Technology
File Size	473.76 KB
Description	PWM Fan Speed Controller
Download	TC646 Download (PDF)

General Description

The TC646 is a switch mode, fan speed controller for use with brushless DC fans.

Temperature proportional speed control is accomplished using pulse width modulation (PWM).

A thermistor (or other voltage output temperature sensor) connected to the VIN input furnishes the required control voltage of 1.25V to 2.65V (typical) for 0% to 100% PWM duty cycle.

Overview

Key Features

Temperature Proportional Fan Speed for Acoustic Control and Longer Fan Life.
Efficient PWM Fan Drive.
3.0V to 5.5V Supply Range: - Fan Voltage Independent of TC646 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.
Space Saving 8-Pin MSOP Package.
Over-temperature Indicatio.

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