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

Claim 0:
1. A power supply circuit comprising:
a charge system circuit that charges a battery based on power received by a power receiving unit from an external power transmission device; and
a discharge system circuit that supplies power to a power supply target device based on a battery voltage from the battery, wherein
the discharge system circuit includes:
a power feeder circuit configured to perform a power supply operation to feed 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 the power from the external power transmission device.