| 摘要 |
The switching power supply apparatus includes detection means for detecting that leak current of an input smoothing capacitor becomes a predetermined value or more and first auxiliary switching means connected in series with respect to the input smoothing capacitor. The first auxiliary switching means becomes an on state during a normal operation, whereas the first auxiliary switching means goes into an off state in a case where the detection means detects that the leak current of the input smoothing capacitor becomes a predetermined value or more.
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