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ManufacturerMicrochip
SeriesTC648B

The TC648B is a new version of the existing TC648 fan speed controller

Datasheets

  • Download » Datasheet PDF, 566 Kb, File published: Feb 5, 2013
    TC646B/TC648B/TC649B Datasheet
    Docket ↓
    TC646B/TC648B/TC649B
    PWM Fan Speed Controllers With Auto-Shutdown, 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 TC646B/
    TC648B/TC649B Supply Voltage
    -Supports any Fan Voltage FanSense™ Fault Detection Circuit Protects
    Against Fan Failure and Aids System Testing
    (TC646B/TC649B) Automatic Shutdown Mode for “Green” Systems Supports Low Cost NTC/PTC Thermistors Over-Temperature Indication (TC646B/TC648B) Fan Auto-Restart Space-Saving 8-Pin MSOP Package The TC646B/TC648B/TC649B devices are new versions of the existing TC646/TC648/TC649 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. The auto-shutdown threshold/temperature is set
    by a simple resistor divider on the VAS input. An integrated Start-Up Timer ensures reliable fan motor startup at turn-on, coming out of shutdown mode, autoshutdown mode or following a transient fault. A logic
    low applied to VIN (pin 1) causes fan shutdown. Applications Personal Computers & Servers
    LCD Projectors
    Datacom & Telecom Equipment
    Fan Trays
    File Servers
    General-Purpose Fan Speed Control Package Types ...

Prices

Status

TC648BEOATC648BEOA713TC648BEPATC648BEUATC648BEUA713
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

TC648BEOATC648BEOA713TC648BEPATC648BEUATC648BEUA713
PackageSOICSOICPDIPMSOPMSOP
Pins88888

Parametrics

TC648BEOATC648BEOA713TC648BEPATC648BEUATC648BEUA713
Auto shutdownYesYesYesYesYes
DescriptionFan ManagerFan ManagerFan ManagerFan ManagerFan Manager
External Temp InputYesYesYesYesYes
Fan Speed TableNoNoNoNoNo
FanSense fan monitorNoNoNoNoNo
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

TC648BEOATC648BEOA713TC648BEPATC648BEUATC648BEUA713
RoHSCompliantCompliantCompliantCompliantCompliant

Other Options

TC646B TC649B

Moldel Line

Series: TC648B (5)

Manufacturer's Classification

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

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