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TC649

Status: In Production

Features:

  • Temperature Proportional
  • Fan Speed for Acoustic Control and Longer Fan Life
  • Efficient PWM Fan Drive
  • 3.0V to 5.5V Supply Range
  • Supports Any Fan Voltage!
  • Fault Detection Circuits Protect Against Fan Failure and Aid System Testing
  • Automatic Shutdown Mode for "Green" Systems
  • Supports Low Cost NTC/PTC Thermistors
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Overview
Documents
Development Environment
Similar Devices
RoHS Information
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Device Overview

Summary

The TC649 is a switch mode fan speed controller for use with brushless DC motors. Temperature proportional speed control is accomplished using pulse width modulation(PWM). A thermistor (or other voltage output temperature sensor) connected to VIN furnishes the required control voltage of 1.25V to 2.65V (typical) for 0% to 100% PWM duty cycle. The TC649 automatically suspends fan operation when measured temperature (VIN) is below a user-programmed minimum setting (VAS). An integrated Start-Up Timer ensures reliable motor start-up at turn-on, coming out of Shutdown Mode, or following a transient fault. In normal fan operation, a pulse train is present at SENSE, Pin 5. A Missing-pulse Detector monitors this pin during fan operation. A stalled, open, or unconnected fan causes the TC649 to trigger its Start-up timer once. If the fault persists, the FAULT output goes low, and the device is latched in its Shutdown Mode. See the Applications section for more information and system design guidelines. The TC649 is packaged in a space-saving 8-Pin PDIP, MSOP or a SOIC package and is available in the industrial temperature range.

Additional 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!
    • Fault Detection Circuits Protect Against Fan Failure and Aid System Testing
    • Automatic Shutdown Mode for "Green" Systems
    • Supports Low Cost NTC/PTC Thermistors
Parametrics
Name
Value
Device Description
Fan Manager
Typical Accuracy (°C)
Depends on external thermistor
Max. Supply Current (µA)
1000
Max. Accuracy @ 25°C (°C)
Depends on external thermistor
Integrated Temp Sensor
Yes
Fan Sense
Yes
Auto Shutdown
Yes
High/Low PWM Freq
Low
Temp Range (°C)
-40 to +85
Vcc Range (V)
+3.0 to +5.5

Documents

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Data Sheet

02/05/2013
374KB

Product Line Card


Development tools data is currently unavailable.

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RoHS Information

Part Number
Device Weight (g)
Shipping Weight (grams)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
TC649BEUA
0.025600
0.070000
8
MSOP
3x3mm
Matte Tin
e3
TC649BEUATR
0.025600
0.215600
8
MSOP
3x3mm
Matte Tin
e3
TC649EUA
0.025600
0.070000
8
MSOP
3x3mm
Matte Tin
e3
TC649EUATR
0.025600
0.215600
8
MSOP
3x3mm
Matte Tin
e3
TC649VUA
0.025600
0.070000
8
MSOP
3x3mm
Matte Tin
e3
TC649VUATR
0.025600
0.215600
8
MSOP
3x3mm
Matte Tin
e3
TC649BEOA
0.078000
0.250000
8
SOIC
.150In(3.90mm)
Matte Tin
e3
TC649BEOATR
0.078000
0.230303
8
SOIC
.150In(3.90mm)
Matte Tin
e3
TC649EOA
0.078000
0.250000
8
SOIC
.150In(3.90mm)
Matte Tin
e3
TC649EOATR
0.078000
0.230303
8
SOIC
.150In(3.90mm)
Matte Tin
e3
TC649VOA
0.078000
0.250000
8
SOIC
.150In(3.90mm)
Matte Tin
e3
TC649VOATR
0.078000
0.230303
8
SOIC
.150In(3.90mm)
Matte Tin
e3
TC649BEPA
0.486700
0.900000
8
PDIP
.300in
Matte Tin
e3
TC649VPA
0.486700
0.900000
8
PDIP
.300in
Matte Tin
e3
To see a complete listing of RoHS data for this device, please Click here
Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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