US 12,308,739 B2
Feedback control circuit of pulse-frequency modulation converter that adaptively adjusts peak inductor current value according to pulse interval and associated feedback control method
Jui-Hung Wei, Hsinchu (TW); Han-Chi Chiu, Hsinchu (TW); En-Yang Lin, Miaoli County (TW); and John-San Yang, Hsinchu County (TW)
Assigned to Airoha Technology Corp., Hsinchu (TW)
Filed by Airoha Technology Corp., Hsinchu (TW)
Filed on Apr. 27, 2023, as Appl. No. 18/139,953.
Claims priority of provisional application 63/349,599, filed on Jun. 7, 2022.
Prior Publication US 2023/0396163 A1, Dec. 7, 2023
Int. Cl. H02M 3/158 (2006.01); H02M 1/44 (2007.01); H02M 3/155 (2006.01); H02M 1/00 (2006.01); H02M 3/157 (2006.01); H03K 3/037 (2006.01); H03K 5/1532 (2006.01)
CPC H02M 3/155 (2013.01) [H02M 1/44 (2013.01); H02M 3/158 (2013.01); H02M 1/0003 (2021.05); H02M 3/157 (2013.01); H03K 3/037 (2013.01); H03K 5/1532 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A feedback control circuit of a pulse-frequency modulation (PFM) converter, comprising:
a multiplexer circuit, 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; and
a detection circuit, arranged to adaptively adjust the selection control signal according to a pulse interval between two successive inductor current pulses of the PFM converter.