US 12,267,020 B2
Isolated resonant DC-DC converter
Yuri Panov, Research Triangle Park, NC (US); Peter Mantovanelli Barbosa, Research Triangle Park, NC (US); Yihua Chang, Taoyuan (TW); and Kai Dong, Shanghai (CN)
Assigned to Delta Electronics, Inc., Taipei (TW)
Filed by Delta Electronics, Inc., Taipei (TW)
Filed on Sep. 6, 2023, as Appl. No. 18/242,797.
Application 18/242,797 is a division of application No. 17/482,981, filed on Sep. 23, 2021, granted, now 11,791,733.
Prior Publication US 2023/0412085 A1, Dec. 21, 2023
Int. Cl. H02M 3/335 (2006.01); H02M 1/00 (2006.01); H02M 1/08 (2006.01); H02M 1/14 (2006.01); H02M 3/00 (2006.01)
CPC H02M 3/33573 (2021.05) [H02M 1/0009 (2021.05); H02M 1/08 (2013.01); H02M 1/14 (2013.01); H02M 3/01 (2021.05); H02M 3/33571 (2021.05)] 14 Claims
OG exemplary drawing
 
1. An isolated DC-DC converter comprising:
a full-bridge switching stage having a plurality of active switches;
a resonant network having a plurality of resonant components;
a transformer connected to the resonant network;
an output stage connected to the transformer and configured to generate an output voltage;
an error amplifier configured to generate a voltage error signal based on the output voltage and a reference voltage;
a feedforward controller configured to sense an input voltage of the full bridge switching stage and/or an output current of the output stage, and generate a feedforward control signal based on the sensed signal;
an isolated charge sensor connected to the resonant network and configured to generate a charge sensing signal corresponding to one of the resonant components; and
a switch controller configured to generate and provide control signals to the plurality of active switches in charge control mode based on at least the voltage error signal, the feedforward control signal and the charge sensing signal.