This paper presents a novel reverse control strategy for phase-shifted full bridge (PSFB) converters, designed specifically for high-performance, economical automotive DC-DC applications. The approach incorporates an active-clamping (ACL) circuit to effectively eliminate voltage spikes across power switches on the low-voltage (LV) side, while simultaneously achieving zero-voltage switching (ZVS) on the high-voltage (HV) side. The effectiveness of this methodology is validated through a bidirectional 3.5 kW prototype converter that transforms 400V to 13.5V DC, maintaining voltage stress on the LV side field-effect transistors (FETs) below 50V.
