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AN767

Title:
Interfacing Microchip’s Fan Speed Controllers to a SPI™
Name:
AN767
Date:
11/12/2002
Author:
Paul Paglia
Description:
Microchip's TC642, TC643, and TC646 are the world's first integrated circuits dedicated for controlling and monitoring fan speed. The new family of fan speed controllers modulate fan speed to compensate for changes in system temperature. This means the fan runs at full speed only when necessary, significantly extending fan life. In addition to increased fan life, fan speed is controlled by PWM control circuitry that is more efficient than conventional linear techniques. The ICs provide other features such as fan current limiting, minimum speed control, auto shutdown, and speed, fault, and over-temperature indication.
Keywords:
AN51, Fan Speed Controller, SPI Port, TC642, TC643, TC646
 
Application Notes & Source Code
 Last Updated
Size
 
  AN767
  03/14/2004
  202KB
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