Patent ID: 11901764
Assignee: SEIKO EPSON CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. An electronic device comprising:
a power supply target device; and
a power supply circuit configured to charge a battery based on power received from a charger and that supplies power based on a battery voltage from the battery to the power supply target device, the power supply circuit including:
a charge system circuit that charges the battery based on the power received by a power receiving unit from the charger; and
a discharge system circuit that supplies the power to the power supply target device based on the battery voltage from the battery, wherein

the discharge system circuit includes:
a power feeder circuit configured to perform a power supply operation to supply the power to the power supply target device based on the battery voltage, and the power supply operation includes a power-on state, in which the power supply operation is performed, and a power-off state, in which the power supply operation is stopped;
a discharge system control circuit configured to control the power feeder circuit;
a regulator configured to supply a regulated power supply voltage based on the battery voltage to the discharge system control circuit; and
a power-off setting circuit configured to:
set the power feeder circuit to the power-off state when the regulated power supply voltage is turned on by supplying the battery voltage from the battery to the regulator; and
release the power-off state after the power receiving unit starts receiving power from the charger, and

the power supply circuit turns off the supply of the power when the battery is coupled to the power supply circuit, and turns on the supply of the power when the electronic device is placed at the charger in a power transmittable state.