Circuit and method for sub-harmonic elimination of a power converter
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United States of America Patent
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Mar 4, 2014
Grant Date -
Apr 12, 2012
app pub date -
Oct 7, 2011
filing date -
Oct 12, 2010
priority date (Note) -
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Abstract
A circuit and method are provided for a power converter to select one from a plurality of current limit signals as a final current limit signal according to the present duty ratio of a power switch for the pulse width modulation of the next cycle, so that the duty ratio of the power switch in the next cycle is prevented from acute variation to eliminate sub-harmonic which otherwise may happen.
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