| 摘要 |
A switching power supply circuit reduces the capacity of the capacitor on the load side, reducing its size, weight, and cost. The switching power supply circuit has a pair of diodes connected in series, a pair of MOSFETs connected in series, a pair of capacitors connected in series, a snubber capacitor connected in parallel with the pair of diodes, the pair of MOSFETS, and the pair of capacitors. The circuit can include a pair of additional capacitors, connected respectively in parallel with the MOSFETS, to allow the MOSFETs to execute a zero-voltage switching. The circuit also includes an AC input terminal connected to the mutual connection point of the pair of diodes, a transformer including a primary winding having one end connected to the mutual connection point of the pair of MOSFETS, and the other end connected to the mutual connection point of the pair of capacitors. The primary winding has a center tap connected to another AC input terminal.
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