Switched Mode Power Supply Having Variable Minimum Switching Frequency
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United States of America Patent
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app pub date -
Nov 19, 2008
filing date -
Oct 16, 2006
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Abandoned
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Abstract
In a switched mode power supply (SMPS) that regulates an output voltage in response to load conditions by switching an inductor circuit between a supply voltage and ground at a switching frequency, under light loading conditions, the switching frequency of the SMPS is reduced down to a variable minimum switching frequency sufficiently high to avoid audible noise generation.
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