MAX1626 Fan speed control circuit

Published:2011/5/15 5:23:00 Author:John | Keyword: Fan | From:SeekIC

The figure is the speed control circuit of fan, which is mainly constituted by the MAX1626. This circuit reduces the noise and power consumption of the computer, the temperature controller and alarm systems. It achieves by utilizing the closure and output voltage of MDH626. The logic level voltage is added to pin 2 (3V/5V) and pin 3 (SHDN). At the same time, appropriate feedback resistor (Rl and R2) are selected to set the output voltage. In general, low output voltage U (01) (here for 8V) is determined by the sub-decision resistors R1 and R2. And the high output voltage U (02) (here for 12V) is determined by voltage on output end of the chip (pin 4).



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