Input Voltage Range Extension Methods in the Series-Resonant DC-DC Converters

The series resonant dc-dc converters are mature technology used mostly in applications requiring constant dc voltage gain. They were recently enhanced by the application of the boost rectifiers. This approach showed new opportunities for input voltage regulation range extension. The given paper summarizes known operating modes and shows a way of significant input voltage range extension through the utilization of hybrid full-bridge switching cell. Two converter topologies are introduced in this paper. Possible operating modes are identified and summarized.