| 摘要 |
PROBLEM TO BE SOLVED: To provide a power supply apparatus which can be manufactured at a low cost and can contribute to the dimensional reduction of a hot-water supplier. SOLUTION: In a switching power supply apparatus which has an FET 11 as a switching device, a 1st power supply output terminal VOUT 1 and a 2nd power supply output terminal VOUT 2 are provided on the output side of an output transformer 14 with a common ground. The output voltage (for instance 24 V) of the 2nd output terminal VOUT 2 is obtained by superposing an additional voltage (for instance 9 V) upon the output voltage (for instance +15 V) of the 1st output terminal VOUT 1. With such a constitution, two power supply outputs can be obtained by utilizing an existing power supply and the power supply apparatus with a reduced cost and a reduced occupation space can be realized.
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