US 11,901,761 B2
Charging device
Masatsuru Miyazaki, Tokyo (JP); and Norio Fukui, Tokyo (JP)
Assigned to FDK CORPORATION, Tokyo (JP)
Filed by FDK CORPORATION, Tokyo (JP)
Filed on Aug. 19, 2021, as Appl. No. 17/445,482.
Application 17/445,482 is a division of application No. 16/498,382, granted, now 11,228,198, previously published as PCT/JP2018/003260, filed on Jan. 31, 2018.
Claims priority of application No. 2017-061187 (JP), filed on Mar. 27, 2017.
Prior Publication US 2021/0384755 A1, Dec. 9, 2021
Int. Cl. H02J 7/00 (2006.01); H02J 7/02 (2016.01); H01M 10/44 (2006.01); H02J 7/06 (2006.01); H02M 7/06 (2006.01)
CPC H02J 7/02 (2013.01) [H01M 10/44 (2013.01); H02J 7/06 (2013.01); H02J 7/0013 (2013.01); H02J 2207/20 (2020.01); H02M 7/06 (2013.01)] 5 Claims
OG exemplary drawing
 
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.