Frequency Doubled ZVS Synchronous Buck Converter for Battery Charger Application

This paper presents a novel frequency doubled ZVS synchronous buck converter which is suitable for the battery charger application. The doubled frequency will reduce the ripple of the output current. With the proposed converter, all switches realized full load range ZVS operation which will result in high efficiency and reliability. The switching losses are greatly reduced, then the reliability of the converter will be improved. The ZVS realization is analyzed in detail and the design consideration is given. A prototype converter rated at 1.6 kW is built to verify the improved converter.