Switching Power Supply with a Resonant Converter and Method Controlling the Same
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United States of America Patent
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Issued Date -
Apr 16, 2015
app pub date -
Oct 16, 2013
filing date -
Oct 16, 2013
priority date (Note) -
Abandoned
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Abstract
A switching power supply with a resonant converter has an AC to DC converter and a DC to DC converter. The AC to DC converter converts an inputted AC power into a DC power. The DC to DC converter has a resonant converter determining a current operating state according to waveforms of a transformer voltage and a driving signal actually measured and further controlling a switching frequency of the resonant converter to approach or to be equal to a resonant frequency for operational efficiency enhancement. Accordingly, the failure to accurately calculate a resonant frequency beforehand can be solved and the issue of accurately keeping the switching frequency consistent with the resonant frequency can be tackled.
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