SYSTEM AND METHOD FOR REDUCING POWER LOSS IN SWITCHED-CAPACITOR POWER CONVERTERS
First Claim
1. A system for reducing power loss in a switched-capacitor converter, the system comprising:
- a first and second switched capacitor sub-converter each havinga first, second, third, and fourth switching device each controlled by one of a first, second, third, and fourth clock signal, anda flying capacitor,wherein the first, second, third and fourth clock signals of the second switched capacitor sub-converter are inverted such that the first switched capacitor sub-converter operates during a first phase and the second switched capacitor converter operates during a second phase that is 180 degrees out of phase from the first phase; and
,a resonant charge sharing portion for coupling a bottom-plate parasitic capacitance of the first switched capacitor sub-converter to a bottom-plate parasitic capacitance of the second switched capacitor converter.
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Abstract
A system for reducing power loss in a switched-capacitor converter includes a first and second switched capacitor sub-converter each having a flying capacitor and a first, second, third, and fourth switching device. Each switching device is controlled by one of a first, second, third, and fourth clock signal. The first, second, third and fourth clock signals of the second switched capacitor sub-converter are inverted such that the first switched capacitor sub-converter operates during a first phase and the second switched capacitor converter operates during a second phase that is 1800 degrees out of phase from the first phase. The system also includes a resonant charge sharing portion for coupling a bottom-plate parasitic capacitance of the first switched capacitor sub-converter to a bottom-plate parasitic capacitance of the second switched capacitor converter.
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Citations
11 Claims
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1. A system for reducing power loss in a switched-capacitor converter, the system comprising:
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a first and second switched capacitor sub-converter each having a first, second, third, and fourth switching device each controlled by one of a first, second, third, and fourth clock signal, and a flying capacitor, wherein the first, second, third and fourth clock signals of the second switched capacitor sub-converter are inverted such that the first switched capacitor sub-converter operates during a first phase and the second switched capacitor converter operates during a second phase that is 180 degrees out of phase from the first phase; and
,a resonant charge sharing portion for coupling a bottom-plate parasitic capacitance of the first switched capacitor sub-converter to a bottom-plate parasitic capacitance of the second switched capacitor converter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification