48 V To 12 V Soft-Switching Interleaved Buck And Boost Converter For Mild-Hybrid Vehicle Application

48 V to 12 V Soft-Switching Interleaved Buck and Boost Converter for mild-hybrid vehicle is proposed. The converter is consist of interleaved buck and boost converter with auxiliary inductor. Resonance between auxiliary capacitors and inductor is used for soft-switching. Therefore, reduction of the passive component size and switching loss can be implemented. Also, optimal design of the auxiliary components is suggested for satisfaction of soft switching. The converter and design method are verified in simulation.