Switch mode power supply controllers
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United States of America Patent
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Mar 3, 2009
Grant Date -
Feb 14, 2008
app pub date -
Jun 7, 2007
filing date -
May 23, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
This invention generally relates to discontinuous conduction mode switch mode power supply (SMPS) controllers employing primary side sensing. We describe an SMPS controller which integrates a feedback signal from a point determined by a target operating voltage to a peak or trough of an oscillatory or resonant portion of the feedback signal when substantially no energy is being transferred to the SMPS output. When regulation is achieved this value should be zero; the difference from zero can be used to regulate the output voltage of the SMPS.
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