US 11,916,487 B2
Asymmetric half-bridge converter
Chao-Chang Chiu, Hsinchu County (TW); Kuan-Chun Fang, Tainan (TW); Yueh-Chang Chen, Hsinchu (TW); Tzu-Chi Huang, Hsinchu County (TW); and Che-Hao Meng, Hsinchu (TW)
Assigned to Power Forest Technology Corporation, Hsinchu County (TW)
Filed by Power Forest Technology Corporation, Hsinchu County (TW)
Filed on Mar. 24, 2022, as Appl. No. 17/702,813.
Claims priority of application No. 111105523 (TW), filed on Feb. 16, 2022.
Prior Publication US 2023/0261580 A1, Aug. 17, 2023
Int. Cl. H02M 3/335 (2006.01); H02M 1/00 (2006.01)
CPC H02M 3/33569 (2013.01) [H02M 1/0009 (2021.05)] 12 Claims
OG exemplary drawing
 
1. An asymmetric half-bridge converter, comprising:
a switch circuit comprising an upper arm switch and a lower arm switch, wherein the upper arm switch and the lower arm switch are connected to a connection node;
a resonance tank coupled between the connection node and a ground end;
a current sensor coupled to the resonance tank and configured to sense a waveform of a resonance current flowing through the resonance tank to generate a sensing result, wherein the waveform of the resonance current responds to a load condition; and
a controller coupled to the resonance tank and the switch circuit and configured to:
determine the sensing result,
in response to the sensing result indicating that an ending current value of a primary resonance waveform of the resonance current is greater than a predetermined value, perform a first switching operation on the switch circuit,
and in response to the sensing result indicating that the ending current value of the primary resonance waveform is less than or equal to the predetermined value, perform a second switching operation on the switch circuit.