A general analysis of the zero-voltage switched quasi-resonant buck-boost type DC-DC converter in the continuous and discontinuous modes of the reactor current

The authors present a general design-oriented analysis of the buck-boost type voltage resonant DC-DC power converter in the continuous and discontinuous modes of the reactor current. In this analysis, the loss resistance in each part of the power circuit, the inductance of the reactor, the effective value of the power loss, and the energy balance among the input, output and internal-loss powers are taken into account. As a result, the behavior and characteristics of the buck-boost type voltage resonant DC-DC converter are clarified. Experiment results confirming the analysis are presented