To solve the loss of zero-voltage switching (ZVS) performance of traditional DC/DC phase-shifted full-bridge converters under light load and the serious reverse recovery problems of the secondary diodes，in this paper，by moving the filter inductor on the secondary side of the traditional DC/DC phase-shifted full-bridge converter to the primary side，the zero-voltage switching (ZVS) performance of all the switches in the primary-side under heavy load is achieved，and the zero-current switching (ZCS) performance of switches in the lagging bridge can be achieved under light load. In addition，the current of the secondary-side diodes obtains natural zero-crossing characteristics under heavy load and enters in discontinuous conduction mode (DCM) under light load，which effectively weakens the diode reverse recovery problem. Continuous conduction mode (CCM) and DCM of the topology are described in detail，and the realization mechanism of ZV-ZCS characteristics is clarified. By establishing the gain equations in different modes of the topology，the design rules of key parameters are inferred. Finally，simulation based on PSIM software and a 2 kW experiment prototype are developed to verify the characteristic of the topology and the correctness of the theoretical analysis.