Patent ID: 7289338

Claim:
A DC to DC converter for converting a DC input power into a DC output power through first and second output terminals, the DC to DC converter comprising: an inverter circuit configured to convert the DC input power into an AC power; a transformer circuit including a primary winding and a secondary winding member and configured to convert the AC power applied to the primary winding from the inverter circuit into an output power, the secondary winding member being composed of a first secondary winding, a second secondary winding, a third secondary winding, and a fourth secondary winding, the first to fourth secondary windings being connected in series, the series-connected first to fourth secondary windings having one and the other ends, the one and the other ends of the series-connected first to fourth secondary windings being connected to the first output terminal, the first and second secondary windings being wound around a first magnetic path in opposite directions so as to be electromagnetically coupled to the primary winding, the third and fourth secondary windings being wound around a second magnetic path in opposite directions so as to be electromagnetically coupled to the primary winding; a first rectifying element connected between the second output terminal and a connection point between the first and second secondary windings; and a second rectifying element connected between the second output terminal and a connection point between the third and fourth secondary windings.