Voltage converter circuit, electronic device including the same and voltage conversion method
First Claim
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1. A voltage converter circuit, comprising:
- a plurality of switched capacitors; and
a buck converter comprising an inductor and a capacitor, the buck converter configured to be alternately supplied with a first voltage and a second voltage output from each of two switched capacitors selected from the plurality of switched capacitors, to convert the supplied first voltage or second voltage into an output voltage via an LC filter and to provide the output voltage; and
a feedback controller configured to select the two switched capacitors for outputting the voltage supplied to the buck converter from among the plurality of switched capacitors,wherein output terminals of each of the plurality of switched capacitors are selectively electrically connected to an input terminal of the buck converter.
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Abstract
The present disclosure relates to a voltage conversion circuit including: a plurality of switched capacitors; and a buck converter configured to be alternately applied with a first voltage and a second voltage output from each of two switched capacitors selected from the plurality of switched capacitors and to convert the applied first voltage or second voltage into an output voltage and to provide the output voltage. According to an embodiment, output terminals of each of the plurality of switched capacitors may be selectively electrically connected to an input terminal of the buck converter.
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Citations
17 Claims
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1. A voltage converter circuit, comprising:
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a plurality of switched capacitors; and a buck converter comprising an inductor and a capacitor, the buck converter configured to be alternately supplied with a first voltage and a second voltage output from each of two switched capacitors selected from the plurality of switched capacitors, to convert the supplied first voltage or second voltage into an output voltage via an LC filter and to provide the output voltage; and a feedback controller configured to select the two switched capacitors for outputting the voltage supplied to the buck converter from among the plurality of switched capacitors, wherein output terminals of each of the plurality of switched capacitors are selectively electrically connected to an input terminal of the buck converter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An electronic device, comprising:
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a first switched capacitor configured to generate a first voltage; a second switched capacitor configured to generate a second voltage; a converter comprising an inductor and a capacitor, the converter configured to be electrically connected to the first switched capacitor and the second switched capacitor; a third switched capacitor configured to generate a third voltage; and a feedback controller configured to select a switched capacitor for providing a voltage to the converter based on an input voltage applied to the first switched capacitor, the second switched capacitor, and the third switched capacitor, the output voltage, and the first voltage, the second voltage and the third voltage, wherein the converter is configured to control an output voltage of the converter via an LC filter using the first voltage and the second voltage. - View Dependent Claims (11, 12, 13)
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14. A voltage conversion method of a voltage converter circuit including a plurality of switched capacitors, each having different voltage conversion ratios, and a buck converter comprising an inductor and a capacitor, the method comprising:
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converting, by each of the plurality of switched capacitors, an input voltage into a voltage having different respective values; alternately applying a first voltage and a second voltage output from each of two switched capacitors selected from the plurality of switched capacitors to the buck converter; and converting the applied first voltage or second voltage into an output voltage corresponding to a reference output voltage by the buck converter via an LC filter; outputting the output voltage; measuring the outputted voltage; and selecting two switched capacitors based on a difference between the outputted voltage and the reference output voltage. - View Dependent Claims (15, 16, 17)
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Specification