US 9,812,855 B2
Resonant converter and driving method thereof
Won-Tae Lee, Cheonan-si (KR); Ji-Hoon Jang, Incheon (KR); Hyeong Seok Baek, Bucheon-si (KR); and Hang-Seok Choi, Bedford, NH (US)
Assigned to Fairchild Korea Semiconductor Ltd., Bucheon (KR)
Filed by FAIRCHILD KOREA SEMICONDUCTOR LTD., Bucheon-si (KR)
Filed on Dec. 10, 2015, as Appl. No. 14/964,998.
Claims priority of provisional application 62/090,004, filed on Dec. 10, 2014.
Prior Publication US 2016/0172989 A1, Jun. 16, 2016
Int. Cl. H02M 3/335 (2006.01); H02H 3/247 (2006.01); H02M 1/00 (2006.01); H02M 1/32 (2007.01); H02M 1/36 (2007.01)
CPC H02H 3/247 (2013.01) [H02M 1/00 (2013.01); H02M 1/32 (2013.01); H02M 3/33592 (2013.01); H02M 1/36 (2013.01); H02M 2001/0003 (2013.01); Y02B 70/1433 (2013.01); Y02B 70/1475 (2013.01); Y02P 80/112 (2015.11)] 20 Claims
OG exemplary drawing
 
1. A resonant converter, comprising:
a first switch on a primary side and a second switch coupled to the first switch;
a synchronization rectification switch on a secondary side configured to conduct during a conduction period in response to a switching operation of the first switch; and
a switch control circuit configured to determine an operating region of the resonant converter to be below resonance based on a result of a comparison between the conduction period and an on period of the first switch.