 2002-2012 Microchip Technology Inc.

DS21452C-page 1

TC652/TC653

Features

• Integrated Temperature Sensing and Multi-speed

Fan Control

• FanSense™ Fan Fault Detect Circuitry

• Temperature Proportional Fan Speed Control for

Acoustic Noise Reduction and Longer Fan Life

• Pulse Width Modulation Output Drive for Cost

and Power Savings

• Solid-State Temperature Sensing

• ±1°C (Typical) Accuracy from 25°C to +70°C

• 2.8V – 5.5V Operating Range

• TC653 includes Auto Fan Shutdown

• Low Operating Current: 50

A (Typical)

Applications

• Thermal Protection For Personal Computers

• Digital Set-Top Boxes

• Notebook Computers

• Data Communications

• Power Supplies

•Projectors

Related Literature

• Application Note: AN771

Device Selection Table

The "X" denotes a suffix for temperature threshold settings.

Contact factory for other temperature ranges.

Package Type

General Description

The TC652/TC653 are integrated temperature sensors

and

brushless

DC

fan

speed

controllers

with

their junction temperature and control the speed of the

fan based on that temperature, making them especially

suited for applications in modern electronic equipment.

the need for a more expensive 3-wire fan.

Temperature data is converted from the on-chip

thermal sensing element and translated into a

fractional fan speed from 40% to 100%. A temperature

selection guide in the data sheet is used to choose the

low and high temperature limits to control the fan. The

TC652/TC653 also include a single trip point over

additional temperature sensors. In addition, the TC653

includes an auto fan shutdown function for additional

power savings.

The TC652/TC653 are easy to use, require no software

overhead and are therefore the ideal choice for

implementing thermal management in a variety of

systems.

Part Number

Package

Temperature Range

TC652XXVUA

8-Pin MSOP

-40

C to +125C

TC653XXVUA

8-Pin MSOP

-40

C to +125C

X

Temperature

A25

B30

C35

D40

E45

F50

G55

1

8

2

7

3

6

4

5

FAULT

MSOP

GND

PWM

SENSE

GND

TC652

TC653

SHDN

Integrated Temperature Sensor & Brushless DC Fan

Controller with FanSense™ Detect & Over-Temperature