US 12,149,157 B2
Controller applied to a power converter and operational method thereof
Ming-Chang Tsou, Hsinchu County (TW); Chao-Chih Lin, Hsinchu County (TW); and Meng-Jen Tsai, Hsinchu County (TW)
Assigned to Leadtrend Technology Corp., Hsinchu County (TW)
Filed by Leadtrend Technology Corp., Hsinchu County (TW)
Filed on Nov. 9, 2022, as Appl. No. 17/983,406.
Claims priority of application No. 111130879 (TW), filed on Aug. 17, 2022.
Prior Publication US 2024/0063706 A1, Feb. 22, 2024
Int. Cl. H02M 1/00 (2007.01); H02M 3/335 (2006.01)
CPC H02M 1/0025 (2021.05) [H02M 1/0058 (2021.05); H02M 3/33507 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A controller applied to a power converter, wherein the controller is installed in a primary side of the power converter, the controller comprising:
a capacitor for generating a tracking voltage;
an adjustment signal generation circuit for generating an adjustment signal according to a feedback voltage and the tracking voltage; and
a discharge circuit for discharging the capacitor according to the feedback voltage and the adjustment signal, wherein the tracking voltage is used for tracking a state of a magnetizing current of a magnetizing inductor of the primary side of the power converter, and when the tracking voltage consists with the state of the magnetizing current, the tracking voltage is applied to at least one of zero-voltage switching (ZVS) control and quasi-resonant (QR) control of the power converter.