The primary winding Wp and clamping winding Wc are tightly coupled windings that allow the primary winding Wp clamp snubbing using a ground reference on the clamping winding Wc. The second diode D2 and the second capacitor C2 form a peak voltage clamp limiting the primary winding Wp voltage excursion.

In conclusion, the energy used to charge the first capacitor C1 was derived from the second capacitor C2 that stored energy from the previous cycle inductive spike, returning the clamped energy to the power source 13. Therefore, the energy in the first capacitor C1 and the energy in the second capacitor C2 may not be consumed by a resistor, and power consumption of the low loss snubber may be decreased.

Further with reference to FIGS. 1 and 2, the clamping winding Wc is wound with the same number of turns as the primary winding Wp, and is wound bifilar. Namely, the clamping winding Wc and the primary winding Wp have same number of turns. The clamping winding Wc and the primary winding Wp may form a bifilar structure to minimize leakage inductance and to provide magnetic coupling for voltage translation of voltage spike of the first node n1.

Besides, in a third embodiment of the present invention, the low loss snubber 11 further includes a third capacitor C3. The third capacitor C3 is electrically connected between the anode of the second diode D2 and the first node n1. Since the primary winding Wp to the clamping winding Wc leakage inductance is non-zero, the third capacitor C3 clamps the non-magnetically coupled energy stored in the leakage inductance.