LOAD ADAPTIVE VARIABLE FREQUENCY PHASE-SHIFT FULL-BRIDGE DC/DC CONVERTER

摘要

Systems, methods, and circuits for providing zero voltage switching conditions across all load conditions in a full-bridge DC/DC converter. An asymmetric auxiliary circuit is provided and the reactive current due to the auxiliary circuit is controlled across various load conditions. This is done by adaptively adjusting the switching frequency of the converter as well as the phase shift of the rising edges of the waveforms for activating the gates in the leading and lagging legs of the full bridge converter.