US 12,267,021 B2
Systems and methods for controlling synchronous rectification
Chunsheng Zhao, Shanghai (CN); Yaming Cao, Shanghai (CN); and Lieyi Fang, Shanghai (CN)
Assigned to On-Bright Electronics (Shanghai) Co., Ltd., Shanghai (CN)
Filed by ON-BRIGHT ELECTRONICS (SHANGHAI) CO., LTD., Shanghai (CN)
Filed on Aug. 2, 2023, as Appl. No. 18/229,596.
Application 18/229,596 is a continuation of application No. 17/152,418, filed on Jan. 19, 2021, granted, now 11,764,697.
Claims priority of application No. 202010063404.0 (CN), filed on Jan. 20, 2020.
Prior Publication US 2024/0072678 A1, Feb. 29, 2024
Int. Cl. H02M 3/335 (2006.01)
CPC H02M 3/33592 (2013.01) [H02M 3/33515 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A system for controlling synchronous rectification, the system comprising:
a voltage generator configured to receive a second voltage and generate a third voltage based at least in part on the second voltage;
a filter circuit including a resistor and a capacitor, the filter circuit being configured to receive the second voltage and generate a fourth voltage based at least in part on the second voltage;
a first comparator configured to receive the third voltage and the fourth voltage and generate a first comparison signal based at least in part on the third voltage and the [four] fourth voltage;
a second comparator configured to receive a predetermined threshold voltage and a first voltage and generate a second comparison signal based at least in part on the predetermined threshold voltage and the first voltage; and
a signal generator configured to generate a control signal based on at least information associated with the first comparison signal and the second comparison signal.