Novel non-isolated LLC resonant converters

In this paper, a novel non-isolated LLC resonant converter is proposed. This converter can achieve most merits of isolated LLC resonant converter, like zero voltage switching and very low turn off loss for all MOSFETs. By non-isolated technique, the turns of transformer can be largely reduced. Meanwhile, the current through secondary windings is also reduced. Thus, the transformer loss is decreased. An 1MHz prototype is built to verify the proposed converter.