Variable on-time control method for high light-load efficiency, small output voltage ripple, and audible-noise-free operation
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United States of America Patent
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Jan 1, 2013
Grant Date -
Sep 8, 2011
app pub date -
Mar 2, 2010
filing date -
Mar 2, 2010
priority date (Note) -
Expired
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Abstract
An apparatus and method of controlling power converters is achieved that produces high light-load efficiency and reduced output voltage ripple while maintaining quiet operation that is free from audible noise. The inventive method includes a variable on-time control circuit that is applicable to a wide variety of switching mode converters, including, but not limited to, boost converters, buck converters, buck-boost converters, single-ended primary inductor (SEPIC) converters, and other converter topologies, both isolated and non-isolated.
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