A development of the 10 MHz FORWARD ZVS-MRC isolated power module for on-board application

This paper describes the most effective way to increase switching frequency up to 10 MHz using a forward zero voltage switching multi-resonant power converter (ZVS-MRC) method. ZVS-MRC is effective in minimizing the switching loss as well as absorbing parasitic elements. ZVS-MRC can also accommodate very high frequency because of its ability to reduce switching loss in theory and at a rather high frequency level, the quantity of resonance is reduced resulting in less components used. In some cases, resonance can be achieved only by the parasitic characteristics of certain components reducing even more components used in the final product. However, at even higher frequency, the parasitic element that is created by the components becomes source of the constraint to the resonant frequency making very high level of frequency less feasible. This paper attempts to achieve a 10 MHz switching frequency on a 50 W power module by choosing optimum components according to analysis of frequency characteristics on each component to reduce parasitic elements; and focuses on optimal design to absorb parasitic elements by resonance