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

Claim 2:
3. The charging device according to claim 2, wherein the charging circuit includes a first field-effect transistor, a second field-effect transistor, and a charging control unit which performs on-off control on the first field-effect transistor and the second field-effect transistor in accordance with a charging status of the secondary battery, a source of the first field-effect transistor being connected to an output of the DC-DC converter, a source of the second field-effect transistor being connected to the power supply terminal of the receptacle, and a drain of the first field-effect transistor being connected to a drain of the second field-effect transistor, and
the light-emitting diode of the photocoupler has an anode connected to a juncture of the drain of the first field-effect transistor and the drain of the second field-effect transistor and a cathode connected to the housing of the receptacle.