Patent ID: 9577540
Date: 2017-02-21
CPC Classifications: H02M

Claim:
1. A DC-DC power converter circuit comprising: an intermediate circuit comprising first and second capacitors coupled in series across first and second DC input terminals and defining a midpoint; a flyback transformer having a first primary winding coupled on a first end to the first DC input terminal, a second primary winding coupled on a first end to the midpoint, and a secondary winding; a first switching element coupled between a second end of the first primary winding and the midpoint; a second switching element coupled between a second end of the second primary winding and the second DC input terminal; the secondary winding of the flyback transformer is configured for coupling to a DC load; and control circuitry is coupled to the first and second switching elements and effective to turn the first and second switching elements on and off synchronously, wherein a voltage across the first capacitor is substantially equal to a voltage across the second capacitor, further wherein a voltage stress across the first and second switching elements is substantially equal.