Only a set of active-clamp circuit composed of a switch and a small capacitor is necessary to recycle the leakage energy of the coupled- Inductors and to suppress the turn-off voltage spikes.

• 耦合电感的漏感限制了输出二极管关断电流的下降速率，抑止了输出二极管的反向恢复，大大减小了反向恢复电流引起的损耗。