Power converter

A power converter comprising:

• two DC input terminals that input a DC input voltage;
• two DC output terminals that output a DC output voltage;
• an isolation transformer with a primary winding and a secondary winding that has a center tap terminal;
• a switch that is connected across the two DC input terminals in a state where the switch is connected in series to the primary winding and that switches the DC input voltage;
• an LC resonance circuit that includes an inductance and a capacitance and is connected in parallel to the primary winding;
• a first resonant capacitance that is connected in parallel to the switch;
• a third resonant capacitance that is connected between one end of the secondary winding and the center tap terminal;
• a fourth resonant capacitance that is connected between another end of the secondary winding and the center tap terminal;
• and
• a rectifying and smoothing circuit that rectifies and smoothes a voltage generated across both ends of the third resonant capacitance and a voltage generated across both ends of the fourth resonant capacitance and outputs as the DC output voltage across the two DC output terminals.

A power converter comprising:

• two DC input terminals that input a DC input voltage;
• two DC output terminals that output a DC output voltage;
• an isolation transformer with a primary winding, a secondary winding, and an auxiliary winding;
• a switch that is connected across the two DC input terminals in a state where the switch is connected in series to the primary winding and that switches the DC input voltage;
• an LC resonance circuit that includes an inductance and a capacitance and is connected in parallel to the auxiliary winding;
• a first resonant capacitance that is connected in parallel to the switch;
• a second resonant capacitance that is connected in parallel to the secondary winding;
• and
• a rectifying and smoothing circuit that rectifies and smoothes a voltage generated across both ends of the second resonant capacitance and outputs as the DC output voltage across the two DC output terminals.