Schaltnetzteil

摘要

The invention is directed to a switching power supply apparatus comprising at least two capacitors for dividing an input voltage (VIN) to produce a divided voltage (VC), a transformer having a primary winding, and storing energy in a leakage inductance and an exciting inductance of said transformer, two switching means for switching so as to alternately applying said divided voltage to said primary winding to generate an alternating current output voltage, and bidirectional switching means for shortcircuiting said primary winding in a period of nonconductive state of said two switching means, and thereby said energy stored in the leakage inductance and the exciting inductance of said transformer being held.