公开(公告)号：US20240313747A1

公开(公告)日：2024-09-19

申请号：US18399660

申请日：2023-12-28

Applicant: Airoha Technology Corp

Inventor： Han-Chi Chiu ,  Jui-Hung Wei ,  Ke-Deng Huang ,  John-San Yang

IPC: H03K3/017 ,  H03K3/037

CPC classification number: H03K3/017 ,  H03K3/037

Abstract: 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 PEM converter.

公开(公告)号：US20230396163A1

公开(公告)日：2023-12-07

申请号：US18139953

申请日：2023-04-27

Applicant: Airoha Technology Corp.

Inventor： Jui-Hung Wei ,  Han-Chi Chiu ,  En-Yang Lin ,  John-San Yang

IPC: H02M3/155 ,  H02M1/44

CPC classification number: H02M3/155 ,  H02M1/44 ,  H03K3/037

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.