| 摘要 |
In an electronic apparatus, a voltage converting circuit outputs converted power obtained by converting a voltage on the basis of power supplied from an electricity supply device, and a load circuit operates with the converted power, the load circuit can be efficiently operated by the power from the electricity supply device even when the load circuit has an operating mode extremely different in a consumed electric current and a consumed electric current variation. Namely, the electronic apparatus of the invention has an electricity supply device for supplying first power, a voltage converting circuit for outputting converted power obtained by converting a voltage of the first power, a control circuit for outputting a control signal for controlling an operation of the voltage converting circuit and outputting fourth power on the basis of the inputted converted power, and a load circuit operated by the fourth power. Further, the load circuit has first and second operating modes, and also has a function for outputting an operating mode signal for transmitting in which of the first and second operating modes the load circuit is operated to the control circuit. The control circuit has first and second output voltage control modes, and also has a function for selecting in which of the first and second output voltage control modes an output voltage of the voltage converting circuit is controlled by the operating mode signal.
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