Driving circuit and method for fan
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United States of America Patent
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Issued Date -
Jan 23, 2014
app pub date -
Oct 8, 2012
filing date -
Jul 17, 2012
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A driving circuit for a fan includes an initiation module for generating a switch signal according to a feedback signal, a control module coupled to the initiation module for generating a control signal according to the switch signal and a predetermined comparison signal, so as to drive the fan for a rotational operation, and a feedback module coupled to the fan for generating the feedback signal according to a conduction result of the fan, wherein the control module utilizes a pulse frequency modulation technique to generate the control signal, and the conduction result is realized via a voltage type or a current type to correspond to a rotational speed of the rotational operation.
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