Abstract: A non-dissipative snubber circuit for a switched mode power supply in which the excess energy generated by the parasitic voltage spike of a freewheeling diode turning off is directed to either the output of the power supply or to ground. A snubber capacitor stores the excess energy and a snubber circuit path is established during on pulses received by the secondary to allow the excess energy stored in snubber capacitor to be directed to the output of the power supply. Alternatively, the snubber circuit path may direct that excess energy to ground.