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US 9,431,897 B2Granted
Electric device
AssigneesSony Corporation, Sony Interactive Entertainment Inc.
InventorTsuyoshi Ohashi
Life of this patent
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Abstract
Provided is an electric device, including: a secondary battery; and a power supply circuit for dropping an input voltage which is input from the secondary battery to an output voltage and outputting the output voltage to a load, in which the output voltage is stepwise dropped in accordance with the drop of the input voltage.
Claims7
An electric device, comprising:
- a secondary battery;
- and
- a power supply circuit for dropping an input voltage which is input from the secondary battery to an output voltage and outputting the output voltage to a load,
- wherein the power supply circuit drops the output voltage when the input voltage falls below a predetermined first threshold value from the output voltage output when the input voltage is equal to or higher than the predetermined first threshold value;
- and
- wherein, when the input voltage transits from a state of being equal to or higher than the predetermined first threshold value to a state of being lower than the predetermined first threshold value, the power supply circuit waits until the state in which the input voltage is lower than the predetermined first threshold value continues for a predetermined first time period and then drops the output voltage.
3 more elements
A method of controlling a power supply circuit, comprising:
- dropping an input voltage that is input from a secondary battery to an output voltage and outputting the output voltage to a load;
- dropping the output voltage when the input voltage drops below a predetermined first threshold value from the output voltage output when the input voltage is equal to or higher than the predetermined first threshold value;
- and
- when the input voltage transits from a state of being equal to or higher than the predetermined first threshold value to a state of being lower than the predetermined first threshold value, waiting until the state in which the input voltage is lower than the predetermined first threshold value continues for a predetermined first time period and then dropping the output voltage.
1 more element
Dependencies are inferred from the claim text.