Airoha Technology Corporation

Han-Chi Chiu

John-San Yang

Jui-Hung Wei

Ke-Deng Huang

En-Yang Lin

A feedback control circuit of a pulse-frequency modulation (PFM) converter includes an on-time timer circuit and a detection circuit. The on-time timer circuit generates an on-time control signal for controlling an on-time duration of a switch circuit included in a power stage circuit of the PFM converter. The detection circuit controls the on-time timer circuit to adaptively adjust the on-time control signal according to a pulse interval between two successive inductor current pulses of the PFM converter.

Feedback control circuit of pulse-frequency modulation converter that adaptively adjusts on-time control signal and associated feedback control method

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.

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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Hsinchu, Taiwan

Han-Chi Chiu