APPARATUS AND METHOD FOR REDUCING AUDIBLE NOISE OF POWER SUPPLY
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United States of America Patent
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Issued Date -
Nov 21, 2013
app pub date -
Sep 27, 2012
filing date -
May 17, 2012
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method for reducing audible noise of a power supply provides a PWM signal for controlling a power converter. First, a feedback voltage is produced by detecting an output voltage of the power converter. Afterward, a burst-in voltage and a burst-out voltage are set. Afterward, a voltage level of the burst-in voltage or a voltage level of the burst-out voltage is dynamically varied. Afterward, the PWM signal is switched off when the feedback voltage is less than the burst-in voltage. Final, the PWM signal is switched on when the feedback voltage is greater than the burst-out voltage.
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