Weitz, N.N.WeitzUtzelmann, S.S.UtzelmannDitze, StefanStefanDitzeMärz, M.M.März2023-02-132023-02-132022https://publica.fraunhofer.de/handle/publica/43588810.1109/TPEL.2022.31424312-s2.0-85123316368In this article, a resonant push-pull dc-dc converter suitable for switching frequencies in the MHz-range is investigated. Despite a simple design procedure with no need of multiresonant tuning, the converter topology is capable of providing a constant output current over a wide output voltage range in unregulated operation. Based on an analytical solution of steady-state operation, normalized dependencies of converter behavior are determined and used to formulate generalized design considerations. In order to verify the theoretical analysis, the design procedure of a 300-W prototype operating at a switching frequency of 6.78 MHz is described considering the impact of circuit parasitics on converter operation. The prototype provides a stable operation within the full output voltage range of 0-150 V and reaches a peak efficiency of 93% at the nominal output voltage. A rapid transient response of the converter is demonstrated by applying a closed-loop on/off-control to the prototype.enClass E DC-DC converterHigh-frequency power convertersRadio frequencyResonant DC-DC converterZero voltage switchingjournal article