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Datasheet Microchip TC649EOATR

Part NumberTC649EOATR

The TC649 is a switch mode fan speed controller for use with brushless DC motors


  • Download » Datasheet PDF, 383 Kb, File published: Feb 5, 2013
    TC649 Datasheet
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    PWM Fan Speed Controller with Auto-Shutdown
    and FanSenseв„ў Technology
    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 TC649
    Supply Voltage
    -Supports any Fan Voltage FanSenseв„ў Fault Detection Circuits Protect
    Against Fan Failure and Aid System Testing Automatic Shutdown Mode for “Green” Systems Supports Low Cost NTC/PTC Thermistors Space Saving 8-Pin MSOP Package Applications Power Supplies
    File Servers
    Portable Computers
    Telecom Equipment
    UPSs, Power Amps
    General Purpose Fan Speed Control Available Tools Fan Controller Demonstration Board (TC642DEMO) Fan Controller Evaluation Kit (TC642EV) Package Types
    VIN 1 CF 2 VAS
    GND 8 VDD 7 VOUT 3 6 FAULT 4 5 SENSE TC649 General Description
    The TC649 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. The TC649 ...



Lifecycle StatusProduction (Appropriate for new designs but newer alternatives may exist)




Auto shutdownYes
DescriptionFan Manager
External Temp InputNo
Fan Speed TableNo
FanSense fan monitorYes
High/Low PWM FreqLow
Integrated temp sensorYes
Max. Accuracy @ 25°Depends on external thermistor °
Max. Supply Current1000 µA
Operating Temperature Range-40 to +85 °C
Over temp alertNo
Predictive fan fault detection/read/RPMNo
SMBus compatible interfaceNo
Temp. Range-40 - +85 °
Typical AccuracyDepends on external thermistor °
Vcc Range+3.0 - +5.5 V

Eco Plan


Moldel Line

Series: TC649 (9)

Manufacturer's Classification

  • Thermal Management > Fan Controllers > Open Loop Fan Controllers and Fault Detectors

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