Electronic device and control method
AssigneeCanon Kabushiki Kaisha
InventorYuki Nogawa
Life of this patent
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Abstract
An electronic device includes a first switched capacitor unit that steps down the input voltage, a second switched capacitor unit that steps down the output voltage of the first switched capacitor unit, and a control unit that controls the first switched capacitor unit and the second switched capacitor unit such that the electronic device operates in either a first mode for suppressing fluctuations of output voltage by the first switched capacitor unit and the second switched capacitor unit or a second mode for giving priority to power efficiency by the first switched capacitor unit and the second switched capacitor unit.
Claims8
An electronic device comprising:
- a first switched capacitor circuit that steps down an input voltage;
- a second switched capacitor circuit that steps down an output voltage of the first switched capacitor circuit;
- and
- a CPU,
- wherein the CPU causes the electronic device to operate in any one of a plurality of modes including a first mode for suppressing a ripple of output voltage by the first switched capacitor circuit and the second switched capacitor circuit and a second mode for giving priority to power efficiency by the first switched capacitor circuit and the second switched capacitor circuit,
- wherein in a case where the CPU causes the electronic device to operate in the first mode, the CPU controls the first switched capacitor circuit and the second switched capacitor circuit such that the electronic device operates in the first mode, and in a case where the CPU causes the electronic device to operate in the second mode, the CPU controls the first switched capacitor circuit and the second switched capacitor circuit such that the electronic device operates in the second mode.
A method comprising:
- causing a first switched capacitor circuit to step down an input voltage;
- causing a second switched capacitor circuit to step down an output voltage of the first switched capacitor circuit;
- and
- causing an electronic device to operate in any one of a plurality of modes including a first mode of suppressing a ripple of the output voltage by the first switched capacitor circuit and the second switched capacitor circuit and a second mode of prioritizing the power efficiency by the first switched capacitor circuit and the second switched capacitor circuit,
- wherein in a case of causing the electronic device to operate in the first mode, controlling the first switched capacitor circuit and the second switched capacitor circuit such that the electronic device operates in the first mode, and in a case of causing the electronic device to operate in the second mode, controlling the first switched capacitor circuit and the second switched capacitor circuit such that the electronic device operates in the second mode.
Dependencies are inferred from the claim text.