| 摘要 |
A power supply apparatus including: a power supply unit receiving a common AC power and generating a DC power; a constant voltage generator receiving the DC power and outputting a pre-set rated DC voltage; a controller receiving the rated DC voltage and outputting a control signal; and an outputting unit receiving the DC power to the rated DC voltage and being operated according to the control signal. As the single DC power converted from the common AC power is supplied to the peripheral circuit units of a microwave oven, the peripheral circuit units are controlled accordingly. And, since the single power is used, the power supply circuit is simple, contributing to lower down a product cost.
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