US 12,218,597 B2
Cross conduction protection in a voltage converter
Alfredo Medina-Garcia, Munich (DE); and Martin Krueger, Oberschleißheim (DE)
Assigned to Infineon Technologies Austria AG, Villach (AT)
Filed by Infineon Technologies Austria AG, Villach (AT)
Filed on Apr. 4, 2022, as Appl. No. 17/712,490.
Prior Publication US 2023/0318462 A1, Oct. 5, 2023
Int. Cl. H02M 3/335 (2006.01); H02M 1/38 (2007.01); H02M 3/00 (2006.01)
CPC H02M 3/33569 (2013.01) [H02M 1/38 (2013.01); H02M 3/01 (2021.05); H02M 3/33571 (2021.05)] 23 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a controller operable to:
control switching of a first switch and a second switch in a resonant power converter to regulate conveyance of energy from a primary winding of a transformer to a secondary winding of the transformer to generate an output voltage, the primary winding and a resonant capacitor disposed in a resonant circuit path of the resonant power converter;
receive a first signal generated at a first node coupling the first switch and the second switch;
control activation of the first switch to an ON state based on a trigger event associated with the first signal; and
wherein the controller is further operable to: control activation of the first switch to the ON state based on a second signal received from an auxiliary winding magnetically coupled to the primary winding, the second signal used to detect occurrence of the trigger event associated with the first signal.