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The TC664 is a single PWM mode fan speed controller with FanSense TM technology for use with brush-less DC motors


  • Download » Datasheet PDF, 534 Kb, File published: Feb 5, 2013
    TC664/65 Datasheet
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    SMBusв„ў PWM Fan Speed Controllers With
    Fan Fault Detection
    Features Description Temperature Proportional Fan Speed for Reduced
    Acoustic Noise and Longer Fan Life FanSenseв„ў Protects against Fan Failure and
    Eliminates the Need for 3-wire Fans Over Temperature Detection (TC665) Efficient PWM Fan Drive Provides RPM Data 2-Wire SMBusв„ў-Compatible Interface Supports Any Fan Voltage Software Controlled Shutdown Mode for "Green"
    Systems Supports Low Cost NTC/PTC Thermistors Space Saving 10-Pin MSOP Package Temperature Range: -40В°C to +85ВєC The TC664/TC665 devices are PWM mode fan speed
    controllers with FanSense technology for use with
    brushless DC fans. These devices implement temperature proportional fan speed control which lowers
    acoustic fan noise and increases fan life. The voltage
    at VIN (Pin 1) represents temperature and is typically
    provided by an external thermistor or voltage output
    temperature sensor. The PWM output (VOUT) is
    adjusted between 30% and 100%, based on the voltage at VIN. The PWM duty cycle can also be programmed via SMBus to allow fan speed control without
    the need for an external thermistor. If VIN is not connected, the TC664/TC665 will start driving the fan at a
    default duty cycle of 39.33%. See Section 4.3, "Fan
    Startup", for more details). Applications Personal Computers & Servers
    LCD Projectors
    Datacom & Telecom Equipment
    Fan Trays
    File Servers
    General Purpose Fan Speed Control An over-temperature condition is indicated when the ...



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




Auto shutdownNoNo
DescriptionProgrammable Single Fan ManagerProgrammable Single Fan Manager
External Temp InputYesYes
Fan Speed TableNoNo
FanSense fan monitorYesYes
High/Low PWM FreqLowLow
Integrated temp sensorNoNo
Max. Accuracy @ 25°, °Depends on external thermistorDepends on external thermistor
Max. Supply Current, µA320320
Operating Temperature Range, °C-40 to +85-40 to +85
Over temp alertNoNo
Predictive fan fault detection/read/RPMYesYes
SMBus compatible interfaceYesYes
Temp. Range, °-40 - +85-40 - +85
Typical Accuracy, °Depends on external thermistorDepends on external thermistor
Vcc Range, V+3.0 - +5.5+3.0 - +5.5

Eco Plan


Other Options


Moldel Line

Series: TC664 (2)

Manufacturer's Classification

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

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