부산대학교 도서관

In this paper, the LC-L resonant converter, whose resonant inductor is placed at the secondary side of the transformer, is investigated. Through the equivalence relation of resonant tanks, the LLC resonant converter can be turned into the equivalent LC-L resonant converter. Though the LC-L resonant converter inherits almost all advantages of the LLC resonant converter, there exists some differences between them in the losses of magnetic components. The primary winding loss of the LC-L transformer is increased a bit, but the core and winding losses of the LC-L resonant inductor are reduced. Furthermore, in comparison with the LLC resonant converter, the LC-L resonant converter is more suitable for magnetic integration, because core losses of both the transformer and inductor can be reduced. A 700-KHz 430V/48V 400-W prototype is built to verify the theoretical analysis and evaluate the performance of the LC-L resonant converter with integrated magnetics.