Electronic device

摘要

Provided is an electronic device capable of supplying desired electric power to a load so as to operate the load even in a case where charged power is minute and a voltage increase rate of a capacitor, which increases by charge, is low. The electronic device includes: a power source which has supply power less than consumption power of the load; a capacitor to be charged with the supply power; and a charge/discharge control circuit which controls charging of the capacitor and consumption of charged power of the capacitor by the load, and the charge/discharge control circuit includes: a first node to which the supply power of the power source is supplied; and a circuit which charges the capacitor with the supply power from the first node.

主权项

1. An electronic device, comprising:
a load which has a desired function; a power source which has supply power less than consumption power of operation of the load; a capacitor to be charged with electric power based on the supply power; and a charge/discharge control circuit which controls charging of the capacitor with the electric power based on the supply power and consumption of charged power of the capacitor by the load, wherein the charge/discharge control circuit comprises: a first node to which the electric power based on the supply power is supplied; a second node to which the capacitor is coupled; and a circuit connected between the first node and the second node configured to charge the capacitor via the second node from power received at the first node; and wherein when a voltage of the first node is a predetermined voltage or more, the circuit is configured to reduce or discontinue charging of the capacitor, and thereafter the load is operated by the charged power of the capacitor.