Patent ID: 7307857

Claim:
A DC-DC converter for use with a DC power source having a DC voltage across a first voltage source output and a second voltage source output and with a load, the DC-DC converter comprising: a. an input for accepting the DC voltage, the input having a first voltage input point and a second voltage input point, b. an output for outputting a converted DC voltage, the output having a first voltage output point and a second voltage output point, the output having the same polarity as the input, c. two or more high side circuits and a rectifier circuit, or a high side circuit and two or more rectifier circuits, or two or more high side circuits and two or more rectifier circuits; wherein the two or more high side circuits comprise a plurality of transformers and an auxiliary section for each high side circuit, each transformer having a first primary winding, wherein each auxiliary section is connected for causing the transformers to transfer power from each first primary winding to a respective one of a plurality of first secondary winding and to operate without saturation, wherein each high side circuit has a high side circuit output point, and each high side circuit being connected between the first voltage input point and the first voltage output point such that current flowing through each first primary winding is directed between the high side circuit output point and the first voltage output point, and wherein each rectifier circuit includes at least one of the first secondary windings, each rectifier circuit being connected between the first voltage output point and the second voltage output point for converting output of the first secondary winding into a one-direction waveform and converting the one-direction waveform into a DC voltage, and d. an output capacitor connected between the first voltage output point and the second voltage output point and across the rectifier circuit for filtering the converted DC voltage.