Quasi-resonant half-bridge converter and control method thereof
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United States of America Patent
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Jun 6, 2017
Grant Date -
Dec 31, 2015
app pub date -
Jun 15, 2015
filing date -
Jun 30, 2014
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Abstract
A quasi-resonant half-bridge converter includes a switch unit including first and second switches that are coupled in series, a capacitor unit coupled to the switch unit in parallel, a rectifier unit, an output capacitor, and a transformer coupled to the aforesaid components. The first and second switches are respectively controlled using first and second control signals that have a constant frequency. Duty cycles of the first and second control signals may be adjusted based upon a DC output voltage across the output capacitor for promoting conversion efficiency of the converter when operating at light load.
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