| 摘要 |
The power supply apparatus includes a stepdown switching power supply circuit having a switching element and a smoothing circuit, a filter circuit located in the upstream of the stepdown switching power supply circuit and having a noise-suppressing inductor, and a stepup switching power supply circuit having a switching element and a flyback voltage generating inductor. In this power supply apparatus, one and same inductor is used as the noise suppressing inductor and the flyback voltage generating inductor.
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