Direct Power Converter -DPx- for High Gain and High Current Applications

Only one transformer and two power switches are needed to implement a DPx dc-dc converter with constant gain (DCx). Both primary and secondary switches are ON and OFF simultaneously, connecting input and output through the transformer. At turn on, the leakage inductance limits the current transition to its steady state within the switching cycle, where it stays for a duty cycle higher than 50% featuring low rms current in the power switches. During the OFF time the transformer is reset, by a resonance between magnetizing inductance and the capacitance (parasitic and added) in parallel with the switches. It features 1-cycle dynamics and no-load operation. Bi-directional power flow and multiple outputs are straightforward. Excellent performance is obtained for 48 to 4V and 12 to IV dc-dc converters to supply high performance processors which may be extended to other gains as 48 to IV, just changing the transformer turns ratio.