TC652/TC653 Integrated Temperature Sensor & Brushless DC Fan Controller with FanSense Detect & Over-Temperature Features Package Type Integrated Temperature Sensing and Multi-speed MSOP Fan Control V DD 1 8 PWM FanSense Fan Fault Detect Circuitry Built-in Over-Temperature Alert (T ) FAULT 2 7 GND OVER TC652 Temperature Proportional Fan Speed Control for TC653 3 6 SHDN T OVER Acoustic Noise Reduction and Longer Fan Life GND 4 5 SENSE Pulse Width Modulation Output Drive for Cost and Power Savings Solid-State Temperature Sensing General Description 1C (Typical) Accuracy from 25C to +70C The TC652/TC653 are integrated temperature sensors 2.8V 5.5V Operating Range and brushless DC fan speed controllers with TC653 includes Auto Fan Shutdown FanSense technology. The TC652/TC653 measure Low Operating Current: 50A (Typical) their junction temperature and control the speed of the fan based on that temperature, making them especially Applications suited for applications in modern electronic equipment. The FanSense Fan Fault detect circuitry eliminates Thermal Protection For Personal Computers the need for a more expensive 3-wire fan. Digital Set-Top Boxes Temperature data is converted from the on-chip Notebook Computers thermal sensing element and translated into a Data Communications fractional fan speed from 40% to 100%. A temperature Power Supplies selection guide in the data sheet is used to choose the Projectors low and high temperature limits to control the fan. The TC652/TC653 also include a single trip point over Related Literature temperature alert (T ) that eliminates the need for OVER additional temperature sensors. In addition, the TC653 Application Note: AN771 includes an auto fan shutdown function for additional power savings. Device Selection Table The TC652/TC653 are easy to use, require no software Part Number Package Temperature Range overhead and are therefore the ideal choice for implementing thermal management in a variety of TC652XXVUA 8-Pin MSOP -40 C to +125 C systems. TC653XXVUA 8-Pin MSOP -40 C to +125 C X Temperature A25 B30 C35 D40 E45 F50 G55 The denotes a suffix for temperature threshold settings. Contact factory for other temperature ranges. 2002-2012 Microchip Technology Inc. DS21452C-page 1TC652/TC653 Typical Application Diagram +12V DC Fan TC652 300mA +5V V DD Max. TC653 1k V 1 DD PWM 8 2 FAULT GND 7 FanSense 3 SHDN T 6 OVER 0.01F GND SENSE 4 5 C SENSE GND R SENSE Over-Temp 2 SHDN Control Alert Fan Fault Alert Controller DS21452C-page 2 2002-2012 Microchip Technology Inc.