Circuit device, power receiving device, and electronic apparatus
AssigneeSeiko Epson Corporation
InventorKota Onishi
Life of this patent
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Abstract
A circuit device includes a power supply portion that supplies power from a battery to a power supply target, and a control portion that controls the power supply portion. The power supply portion includes a charge pump circuit that steps down a battery voltage VBAT of the battery to a voltage that is m/n times the battery voltage VBAT, and supplies the stepped down voltage to the power supply target from a terminal (n is an integer of one or more, m is an integer of one or more and (n−1) or less). The control portion stops a charge pump operation of the charge pump circuit when a voltage VOUT′ of the terminal satisfies the expression VOUT′>VBAT×m/n.
Claims10
A circuit device comprising:
- a power supply that supplies power from a battery to a power supply target, the power supply including a charge pump circuit that steps down a battery voltage VBAT of the battery to a voltage that is m/n times the battery voltage VBAT, where n is an integer of one or more and m is an integer of one or more and (n−1) or less, and supplies the stepped down voltage to the power supply target from a terminal;
- and
- a processor that controls the power supply, the processor being programmed to stop a charge pump operation of the charge pump circuit when a voltage VOUT′ at the terminal satisfies an expression VOUT′>VBAT×m/n.
Dependencies are inferred from the claim text.