Phase-shifted full-bridge(FB) soft-switching converters are developing form the basic phase-shifted FB-ZVS-PWM converter to phase-shifted FB-ZVZCS-PWM converter and phase-shifted FB-ZCS-PWM converter,to a series of the other new phase-shifted full-bridge circuits,which make up of the converters with developmental and useful foreground.The topology structures,operation characteristics,as well as their merits and demerits are compared and analyzed.The improved phase-shifted FB-ZVS-PWM converter enlarge the load range of ZVS in lag-arm.Phase-shifted FB-ZVZCS-PWM converter solves the problem mentioned above,and insulated gate bipolar transistor(IGBT) is fit for the lag-arm.Phase-shifted FB-ZCS-PWM converter could achieve ZCS in every power tube,and is used in high-power occasion.What's more,the developmental trend of soft-switching converting technic without resonance network is pointed out.