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ManufacturerMicrochip
SeriesTC642B

The TC642B is a new version of the existing TC642 fan speed controller

Datasheets

  • Download » Datasheet, PDF, 549 Kb, 02-05-2013
    TC642B/TC647B data sheet
    Docket ↓
    TC642B/TC647B
    PWM Fan Speed Controllers With Minimum Fan Speed,
    Fan Restart and FanSense™ Technology for Fault Detection
    Features Description Temperature-Proportional Fan Speed for Acoustic
    Noise Reduction and Longer Fan Life Efficient PWM Fan Drive 3.0V to 5.5V Supply Range:
    -Fan Voltage Independent of TC642B/TC647B
    Supply Voltage
    -Supports any Fan Voltage FanSense™ Fault Detection Circuit Protects
    Against Fan Failure and Aids System Testing Shutdown Mode for "Green" Systems Supports Low Cost NTC/PTC Thermistors Over-Temperature Indication (TC642B only) Fan Auto-Restart Space-Saving 8-Pin MSOP Package The TC642B/TC647B devices are new versions of the
    existing TC642/TC647 fan speed controllers. These
    devices are switch mode, fan speed controllers that
    incorporate a new fan auto-restart function. Temperature-proportional speed control is accomplished using
    pulse width modulation. A thermistor (or other voltage
    output temperature sensor) connected to the VIN input
    supplies the required control voltage of 1.20V to 2.60V
    (typical) for 0% to 100% PWM duty cycle. Minimum fan
    speed is set by a simple resistor divider on the VMIN
    input. An integrated Start-Up Timer ensures reliable
    motor start-up at turn-on, coming out of shutdown
    mode or following a transient fault. A logic-low applied
    to VMIN (pin 3) causes fan shutdown. Applications Personal Computers & Servers
    LCD Projectors
    Datacom & Telecom Equipment ...

Prices

Status

TC642BEOATC642BEOA713TC642BEPATC642BEUATC642BEUA713
Lifecycle StatusProduction (Appropriate for new designs but newer alternatives may exist)Production (Appropriate for new designs but newer alternatives may exist)Production (Appropriate for new designs but newer alternatives may exist)Production (Appropriate for new designs but newer alternatives may exist)Production (Appropriate for new designs but newer alternatives may exist)

Packaging

TC642BEOATC642BEOA713TC642BEPATC642BEUATC642BEUA713
PackageSOICSOICPDIPMSOPMSOP
Pins88888

Parametrics

TC642BEOATC642BEOA713TC642BEPATC642BEUATC642BEUA713
Auto shutdownYesYesYesYesYes
DescriptionFan ManagerFan ManagerFan ManagerFan ManagerFan Manager
External Temp InputYesYesYesYesYes
Fan Speed TableNoNoNoNoNo
FanSense fan monitorYesYesYesYesYes
High/Low PWM FreqLowLowLowLowLow
Integrated temp sensorNoNoNoNoNo
Max. Accuracy @ 25°, °Depends on external thermistorDepends on external thermistorDepends on external thermistorDepends on external thermistorDepends on external thermistor
Max. Supply Current, µA400400400400400
Operating Temperature Range, °C-40 to +85-40 to +85-40 to +85-40 to +85-40 to +85
Over temp alertYesYesYesYesYes
Predictive fan fault detection/read/RPMNoNoNoNoNo
SMBus compatible interfaceNoNoNoNoNo
Temp. Range, °-40 - +85-40 - +85-40 - +85-40 - +85-40 - +85
Typical Accuracy, °Depends on external thermistorDepends on external thermistorDepends on external thermistorDepends on external thermistorDepends on external thermistor
Vcc Range, V+3.0 - +5.5+3.0 - +5.5+3.0 - +5.5+3.0 - +5.5+3.0 - +5.5

Eco Plan

TC642BEOATC642BEOA713TC642BEPATC642BEUATC642BEUA713
RoHSCompliantCompliantCompliantCompliantCompliant

Other Options

TC647B

Moldel Line

Series: TC642B (5)

Manufacturer's Classification

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

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