Abstract
This paper introduced a novel synchronous buck converter with soft-swithcing (ZCS and ZVS) for battery charger. The converter structure is simple and easy control.New converter combines synchronous retification and soft-swithing (ZCS and ZVS) to decrease circuit losses. Moreover, the circuit is designed to make current never pass through body diode of synchronous rectifier. Thus,the circuit avoids diode recovery effects which happened frequently in sycnchronous converter topologies. The operating modes of the converter and equivalent circuits are identified by analyzing the operating principles of the charger circuit. Simulation results reveal the theoretical effectiveness of novel battery charger with little voltage ripple and circuit losses, fast dynamic reponse and high efficiency.
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