Isolated Sepic Three-Level DC-DC converter

This paper proposes a new isolated Three-Level(TL) DC-DC converter. The isolated Sepic TL DC-DC converter is based on the conventional Sepic converter. In this new converter the voltage stress of the switch is reduced to a half and the filter inductor is also significantly reduced. Its operation principle and control strategies of the converter are investigated. By modeling and simulation, the performances of the DC-DC converter have been verified, such as low switch voltage stress and so on.