Abstract: A switch-mode DC-DC power converter including an input port and an output port, wherein the switch-mode DC-DC power converter includes a hard-switching circuit. The switch-mode DC-DC power converter further includes a first capacitance, a first inductance and a soft-switching circuit. The first capacitance is coupled in parallel across one of input and output ports at one side of the hard-switching circuit whereas the first inductance is coupled in series with another of the input and output ports and the hard-switching circuit at a second side of the hard-switching circuit opposite the first capacitance. A soft-switching circuit includes a second capacitance, a second inductance, a first rectifying element and a controlled discharger. The first rectifying element is coupled to the second inductance and the second capacitance. The controlled discharger is coupled to the second capacitance.

Abstract: A switch mode pulse width modulated DC-DC power converter having at least one first electronic circuit on an input side and a second electronic circuit on an output side. The first electronic circuit has terminals connecting to a source or load and at least one storage inductor, coupled in series with at least one power transformer winding. For each transformer, an arrangement of switches is adapted to switch the current through the first winding between first and second, ON- and OFF-states. At least one energy storage inductor is charged when all switches of the switching arrangements are conducting and the current through the first winding is in an OFF-state. The second electronic circuit has connecting terminals and a single arrangement of switches to switch the current through the second transformer winding, between the first and second ON- and OFF-states.

Abstract: A switch mode pulse width modulated DC-DC power converter comprises at least one first electronic circuit on a input side (1) and a second electronic circuit on a output side (2). The input side (1) and the output side (2) are coupled via at least two power transformers (T1, T2). Each power transformer (T1, T2) comprises a first winding (T1a, T2a) arranged in a input side converter stage (3, 4) on the input side (1) and a second winding (T1b, T2b) arranged in a output side converter stage (5) on the output side (2), and each of the windings (T1a, T1b, T2a, T2b) has a first end and a second end.