Patent ID: 11901761
Assignee: FDK CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A charging device comprising:
a rectifier circuit which rectifies AC power output by an AC power supply;
a DC-DC converter which converts a voltage of DC power output by the rectifier circuit;
a charging circuit which includes a receptacle having a power supply terminal connected to a positive electrode terminal of a secondary battery in an electronic device via a power supply line of a cable and a ground terminal connected to a negative electrode terminal of the secondary battery via a ground line of the cable, a housing of the receptacle being connected to a ground of the electronic device via a shield of the cable, an output voltage from the DC-DC converter being applied between the power supply terminal of the receptacle and the ground terminal of the receptacle; and
a control circuit which includes a switch circuit that is turned on by a difference in potential between the power supply terminal of the receptacle and the housing of the receptacle and outputs an enable signal for the DC-DC converter when the switch circuit is on.