| 摘要 |
This voltage conversion circuit is provided with: a plurality of primary capacitors, which are charged with power supplied from a power supply; a secondary capacitor, which is connected in parallel to each of the primary capacitors, and which can be charged with a voltage to be supplied to a load circuit; and a plurality of switching circuits, which are provided corresponding to respective the primary capacitors, and which switch states of connections between the primary capacitors and the secondary capacitor. Furthermore, for the purpose of maintaining efficiency of power supply from the power supply to the primary capacitor side at a predetermined efficiency, the states of the connections between the power supply and the primary capacitors are adjusted such that at least some of the primary capacitors among the primary capacitors are in a serially connected state with respect to the power supply. Consequently, voltage conversion efficiency at the time of dropping an output voltage of a power supply circuit to a voltage to be supplied to the load circuit is brought into a best possible state. |
