Patent ID: 8456869

Claim:
An AC/DC converter comprising at its input a rectifier circuit connected in series with a primary winding of an isolating transformer and with a chopper switch (T 1 ) connected to a pulse width modulation control circuit, the isolating transformer having a first secondary winding wound in the same direction as the primary winding and connected to an output line of the converter via a diode (D 4 ) and a filter coil (L 1 ), the output line being connected to an output capacitor (C out ), wherein the isolating transformer has a second secondary winding that is wound in the opposite direction to the primary winding and that is connected directly to the output line via a diode (D 2 ) and the isolating transformer has a third secondary winding that is wound in the same direction as the primary winding and that is connected firstly to a filter coil (L 2 ) and an energy storage capacitor (C res ), and secondly to the output line via a power switch (T 2 ) controlled by a discharge control circuit as a function of a level of charge in the energy storage capacitor.