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General Description

The TC650/TC651 are integrated temperature sensors and brushless DC fan speed controllers. The TC650/ TC651 measure the junction temperature and control the speed of the fan based on that temperature, making them especially suited for applications in modern electronic equipment.

Features

? Integrated Temperature Sensing and Multi-speed Fan Control

? Built-in Overtemperature Alert (TOVER)

? Temperature-proportional Fan Speed Control for Acoustic Noise Reduction and Longer Fan Life

? Pulse Width Modulation (PWM) Output Drive for Cost and Power Savings

? Solid-state Temperature Sensing

? ±1°C (typ.) Accuracy from 25°C to +70°C

? Operating Range: 2.8V – 5.5V

? TC651 includes Automatic Fan Shutdown

? Low Operating Current: 50 ?A (typ.)

Applications

? Thermal Protection For Personal Computers

? Digital Set-Top Boxes

? Notebook Computers

? Data Communications

? Power Supplies

? Projectors