TC648VOA by Microchip | Motion Motor Control | Avnet ASIA

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TC648VOA

Microchip

PWM Fan Motor Speed Controller 8-Pin SOIC N Tube

Manufacturer Part #: TC648VOA

Alternate Part #: TC648VOA


legend RoHS Compliant

Descriptions

Documents

Subs/Alternatives

Information

The TC648 is a switch mode, fan speed controller for use with brushless DC fans. 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, with the exception that the fan is operated at a user programmed minimum setting when the measured temperature is low. An integrated Start-up Timer ensures reliable motor start-up at turn-on, and when coming out of shutdown or auto-shutdown mode. The over-temperature fault output (OTF) is asserted when the PWM reaches 100% duty cycle, indicating a possible thermal runaway situation. The TC648 is available in the 8-pin plastic DIP, SOIC and MSOP packages and is available in the industrial and extended commercial temperature ranges.

Key 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
  • Space Saving 8-Pin MSOP Package

Technical Attributes

Description
Value
Find similar Parts
Pin Count
8
Lead Finish
Matte Tin
Maximum Operating Current
1 mA
Product Dimensions
4.9 x 3.91 x 1.42 mm
Type
PWM Fan Motor Speed Controller
Mounting
Surface Mount
MSL Level
1|3
Supplier Package
SOIC N
Max Processing Temp
260
Shutdown Threshold
2.8 V

ECCN / UNSPSC

Description
Value
ECCN:
EAR99
SCHEDULE B:
8542 2129-00
HTSN:
8542 2129-00
UNSPSC:
32101625
UNSPSC VERSION:
V15.1101
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