METHOD FOR OPERATING IN BURST MODE ACTIVE CLAMP FLYBACK CONVERTERS AND CORRESPONDING ACTIVE CLAMP FLYBACK CONVERTER APPARATUS
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United States of America
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Issued Date -
Jan 16, 2025
app pub date -
Sep 25, 2024
filing date -
Sep 25, 2024
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Abstract
An active flyback converter is transitioned between a plurality of operational states based on a comparison of a control voltage signal to voltage thresholds and a count of a number of consecutive switching cycles during which a clamp switch is kept off. The plurality of operational states includes a run state, an idle state, a first burst state, and a second burst state. Each set of consecutive switching cycles of the first burst state includes a determined number of switching cycles during which signals are generated to turn the power switch on and off and to maintain an off state of the clamp switch, and a switching cycle in a determined position in the set of switching cycles during which signals are sequentially generated to turn the power switch on, turn the power switch off, turn the clamp switch on and turn the clamp switch off.
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