US 11,990,845 B2
Secondary controller applied to a secondary side of a power converter and operation method thereof
Chung-Wei Lin, Hsinchu County (TW); Hung-Ching Lee, Hsinchu County (TW); Hong-Wei Lin, Hsinchu County (TW); and Tsung-Chien Wu, Hsinchu County (TW)
Assigned to Leadtrend Technology Corp., Hsinchu County (TW)
Filed by Leadtrend Technology Corp., Hsinchu County (TW)
Filed on May 31, 2022, as Appl. No. 17/828,038.
Claims priority of application No. 111101957 (TW), filed on Jan. 18, 2022.
Prior Publication US 2023/0231484 A1, Jul. 20, 2023
Int. Cl. H02M 3/335 (2006.01); H02M 1/08 (2006.01)
CPC H02M 3/33592 (2013.01) [H02M 1/08 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A secondary controller applied to a secondary side of a power converter, the secondary controller comprising:
a gate control signal generation circuit for generating a gate control signal, and generating an injection signal according to the gate control signal; and
a control signal generation circuit coupled to an output terminal of the secondary side of the power converter and the gate control signal generation circuit, wherein when a superposition voltage is less than a reference voltage, the control signal generation circuit generates a gate pulse control signal, wherein the superposition voltage corresponds to an output voltage of the power converter and the injection signal, the gate control signal generation circuit is further used for generating a gate pulse signal according to the gate pulse control signal, and the gate pulse signal is used for making a primary side of the power converter turned on.