DESCRIPTION

· The TC652/TC653 are integrated temperature sensors and brushless DC fan speed controllers with FanSense™ technology.

· They measure junction temperature and control fan speed based on that temperature, ideal for modern electronic equipment.

· FanSense™ Fan Fault detect circuitry eliminates 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 include a single trip point overtemperature alert (T_OVER) that eliminates the need for additional temperature sensors.

· 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 ideal for implementing thermal management in various systems.

FEATURES

· Integrated Temperature Sensing and Multi-speed Fan Control.

· FanSense™ Fan Fault Detect Circuitry.

· Built-in Over-Temperature Alert (T_OVER).

· 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 with ±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 µA (Typical).

APPLICATIONS

· Thermal Protection for Personal Computers.

· Digital Set-Top Boxes.

· Notebook Computers.

· Data Communications.

· Power Supplies.

· Projectors.