Voltage converting circuit and electronic device

摘要

A voltage converting circuit includes a plurality of first capacitors that are charged by a power source, a second capacitor, connected in parallel to the plurality of first capacitors, which is able to be charged to a voltage that is supplied to a load circuit, and a plurality of switching circuits, provided in such a way as to correspond to the plurality of first capacitors, each of which switches states of connection between its corresponding first capacitor and the second capacitor. The first capacitors are sequentially connected to the second capacitor through the corresponding switching circuits as charging voltages of the first capacitors reach a predetermined connection voltage that is higher than a charging voltage of the second capacitor so that the first capacitors are not short-circuited with each other.

主权项

1. A voltage converting circuit comprising:
a plurality of first capacitors configured to be charged by a power source; a second capacitor, connected in parallel to the plurality of first capacitors, capable of being charged to a voltage equal to a voltage that is supplied to a load circuit; a plurality of switching circuits, configured to correspond to the plurality of first capacitors respectively, each switching circuit switches states of connection between its corresponding first capacitor and the second capacitor; a connection control circuit configured to sequentially connect the first capacitors to the second capacitor through the corresponding switching circuits as charging voltages of the first capacitors reach a predetermined connection voltage that is higher than a charging voltage of the second capacitor, and control a state of connection of each of the first capacitors to the second capacitor so that the first capacitors are not short-circuited with each other; and voltage monitoring circuits, configured to correspond to the first capacitors respectively, each voltage monitoring circuit monitors the charging voltage of its corresponding first capacitor, wherein the connection control circuit carries out connection control through the switching circuits in accordance with the charging voltages of the first capacitors obtained by the voltage monitoring circuits.