Patent ID: 9667132
Date: 2017-05-30
CPC Classifications: H02M,Y02B

Claim:
1. A flyback converter, the flyback converter comprising: an input to receive input AC power; an output to provide output DC power; a rectifier coupled to the input and configured to convert the input AC power into DC power; a transformer having a primary winding and a secondary winding, the primary winding having a first end coupled to the rectifier; a switch coupled between a second end of the primary winding and a ground connection, the switch being closed in a first mode of operation and open in a second and third mode of operation; and a regenerative snubber circuit coupled between the first end of the primary winding and the second end of the primary winding, the regenerative snubber circuit comprising: wherein the flyback converter is configured such that in the first mode of operation, the DC power from the rectifier charges the transformer, wherein the flyback converter is configured such that, in the second mode of operation, the snubber capacitor stores leakage energy received from the primary winding through the snubber diode, and wherein the flyback converter is configured such that, in the third mode of operation, the snubber capacitor provides the stored leakage energy to the primary winding through the series connection of the snubber resistor and the snubber switch.