FEEDBACK CONTROL CIRCUIT OF PULSE-FREQUENCY MODULATION CONVERTER THAT ADAPTIVELY ADJUSTS PEAK INDUCTOR CURRENT VALUE ACCORDING TO PULSE INTERVAL AND ASSOCIATED FEEDBACK CONTROL METHOD
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United States of America Patent
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Issued Date -
Dec 7, 2023
app pub date -
Apr 27, 2023
filing date -
Jun 7, 2022
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Abstract
A feedback control circuit of a pulse-frequency modulation (PFM) converter includes a multiplexer circuit and a detection circuit. The multiplexer circuit is arranged to receive a plurality of candidate peak current values, and output one of the plurality of candidate peak current values as a target peak current value according to a selection control signal, wherein a peak current value of an inductor current pulse of the PFM converter is subject to the target peak current value. The detection circuit is arranged to adaptively adjust the selection control signal according to a pulse interval between two successive inductor current pulses of the PFM converter.
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