Pulse width modulation controller and method for output ripple reduction of a jittering frequency switching power supply
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United States of America Patent
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Nov 12, 2013
Grant Date -
Aug 2, 2012
app pub date -
Jan 30, 2012
filing date -
Feb 1, 2011
priority date (Note) -
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Abstract
A pulse width modulation controller and method for output ripple reduction of a jittering frequency switching power supply detect the current of a power switch of the switching power supply to generate a current sense signal, and adjust the gain or the level of the current sense signal according to the switching frequency of the power switch to adjust the on time of the power switch, to reduce the output ripple of the switching power supply caused by the jittering frequency of the switching power supply.
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