| 摘要 |
A switching power supply for generating one or more output voltage levels wherein the power supply is operable over a range of AC and DC input supply voltages. The switching power supply comprises an input stage, a start-up stage, a first stage, and a second stage. The first stage energizes the second stage, and the second stage includes output circuits for generating one or more output voltage levels. The second stage also includes a transformer for isolating the first stage.
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