A full bridge soft switched telecom power supply with a current doubler rectifier

This paper presents a full bridge soft switched PWM telecom power supply with a current doubler rectifier. The full bridge PWM DC-to-DC power converter offers high power handling capability, minimum VA ratings for the main devices, no additional auxiliary components and simple PWM-based control strategy. Phase shift control is employed to regulate the output voltage and achieve soft switching. The transformer leakage inductance is utilized effectively to achieve zero voltage turn-on for the main devices. The current doubler rectifier has only one diode conduction drop in addition to frequency doubling in the output capacitor. The transformer secondary winding current rating is one half the load current which improves the overall efficiency of the power converter.