A Capacitive Isolated LLC Converter

In this paper, a novel isolated structure is presented and applied to the LLC converter. The resonant capacitor is separated into two resonant capacitors, which takes a role of not only resonant behavior but also isolation. By doing so, the proposed LLC converter has a higher power density than the traditional LLC converter due to reduction of the size of the transformer. The prototype with 120W/12V is used to demonstrate the feasibility of the proposed isolated structure.