Family of single-switch soft-switching pulse-width modulation DC-DC converters with reduced switch stress

In this study, a new family of pulse width modulation DC-DC converters is introduced. The proposed converters have one switch that turns on at zero current switching condition and turns off at zero voltage switching condition. The proposed auxiliary circuit can be used instead of converter switch in any non-isolated and isolated DC-DC converter. The buck converter from this converter family is analysed and its operating modes are discussed. The design considerations are presented and a prototype is realised. The experimental results confirm the validity of theoretical analysis.

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