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TC648

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
  • Fan Voltage Independent of TC648 Supply Voltage - Supports Any Fan Voltage!
  • Over-Temperature Fault Detection
  • 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 TC648 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 the VIN input furnishes the required control voltage of 1.25V to 2.65V(typical) for 0% to 100% PWM duty cycle. The TC648 can be configured to operate in either Auto-Shutdown or Minimum Speed mode. In Auto-Shutdown mode,fan operation is automatically suspended when measured temperature (VIN) is lower than a user-programmed minimum setting (VAS). The fan is automatically restarted and proportional speed control restored when VIN exceeds VAS (plus hysteresis). Operation in Minimum Speed mode is similar to Auto-Shutdown mode, except the fan is operated at a user-programmed minimum setting when measured temperature is low. An integrated Start-Up Timer ensures reliable motor start-up at turn-on, or when coming out of Shutdown mode. The over-temperature fault (OTF) is asserted when the PWM reaches 100% duty cycle, indicating a possible thermal runaway situation. The TC648 is packaged in a space-saving 8-pin plastic DIP, MSOP or 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 TC648 Supply Voltage - Supports Any Fan Voltage!
    • Over-Temperature Fault Detection
    • 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
Over Temp Alert
yes
Max. Supply Current (µA)
1000
Max. Accuracy @ 25°C (°C)
Depends on external thermistor
External Temp Input
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
348KB

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
TC648BEUA
0.025600
0.070000
8
MSOP
3x3mm
Matte Tin
e3
TC648BEUA713
0.025600
0.215600
8
MSOP
3x3mm
Matte Tin
e3
TC648EUA
0.025600
0.070000
8
MSOP
3x3mm
Matte Tin
e3
TC648EUA713
0.025600
0.215600
8
MSOP
3x3mm
Matte Tin
e3
TC648VUA
0.025600
0.070000
8
MSOP
3x3mm
Matte Tin
e3
TC648VUA713
0.025600
0.215600
8
MSOP
3x3mm
Matte Tin
e3
TC648BEOA
0.078000
0.250000
8
SOIC
.150In(3.90mm)
Matte Tin
e3
TC648BEOA713
0.078000
0.230303
8
SOIC
.150In(3.90mm)
Matte Tin
e3
TC648EOA
0.078000
0.250000
8
SOIC
.150In(3.90mm)
Matte Tin
e3
TC648EOA713
0.078000
0.230303
8
SOIC
.150In(3.90mm)
Matte Tin
e3
TC648VOA
0.078000
0.250000
8
SOIC
.150In(3.90mm)
Matte Tin
e3
TC648VOA713
0.078000
0.230303
8
SOIC
.150In(3.90mm)
Matte Tin
e3
TC648BEPA
0.486700
0.900000
8
PDIP
.300in
Matte Tin
e3
TC648VPA
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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