CHARGING SYSTEM, ELECTRONIC CIRCUIT DEVICE HAVING SECONDARY CELL AND POWER SUPPLY DEVICE FOR CHARGING

摘要

Provided is a charging system wherein a voltage and a current can be accurately supplied from a power supply device even with a cable wiring resistance and a connector contact resistance, and the power supply device can be commonly used even for a plurality of kinds of electronic circuit devices whereupon different secondary cells are mounted. The charging system is provided with an electronic circuit device (50) having a secondary cell (E2), and a power supply device (10) which can be connected/removed to and from the electronic circuit device and supplies power for charging the secondary cell when connected. In the charging system, a detection signal for charge control is transmitted from the electronic circuit device (50) to the power supply device (10), and the control circuit (12) controls output from an SW power supply circuit (11) based on the detection signal.