Weitz N, Utzelmann S, Ditze S, März M (2022)
Publication Type: Journal article
Publication year: 2022
In this work, 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 multi-resonant 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.
Weitz, N., Utzelmann, S., Ditze, S., & März, M. (2022). A Resonant Push-Pull DC-DC Converter With an Intrinsic Current Source Behavior For Radio Frequency Power Conversion. IEEE Transactions on Power Electronics. https://dx.doi.org/10.1109/TPEL.2022.3142431
Weitz, Nikolai, et al. "A Resonant Push-Pull DC-DC Converter With an Intrinsic Current Source Behavior For Radio Frequency Power Conversion." IEEE Transactions on Power Electronics (2022).