| 摘要 |
The present invention provides an overpower-protection circuit and a power supply apparatus (3,4) having the same. The power supply apparatus comprises a rectifier (12), a transformer (14) and an overpower-protection circuit (30,40). The overpower-protection circuit comprises a converter (302,402) having a converter input electronically coupled to the rectifier and a converter output (302a,402a), a photo coupler (304,404) having at least a first terminal coupled with the converter output, and having an output terminal, and a clipper (312,412) electrically coupled across said terminals of the photo coupler for keeping the converter output below a predetermined voltage.
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