High-efficiency, switched-capacitor power conversion using a resonant clocking circuit to produce gate drive signals for switching capacitors

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United States of America Patent

PATENT NO 8320141
APP PUB NO 20110031956A1
SERIAL NO

12535974

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Abstract

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Some embodiments of the present invention provide a system that efficiently converts between a lower input voltage and a higher output voltage. This system includes an input which receives the input voltage, and an output which provides the output voltage. The system also includes a first capacitor with a higher potential terminal and a lower potential terminal, as well as a first set of switching devices which selectively couple the higher potential and lower potential terminals of the first capacitor between the input voltage, the output voltage and a base voltage. The system additionally includes a resonant clocking circuit which generates clock signals with substantially non-overlapping clock phases, including a first phase and a second phase. This resonant clocking circuit is configured to control the first set of switching devices so that during the first phase, the higher potential terminal of the first capacitor is coupled to the input voltage and the lower potential terminal of the first capacitor is coupled to the base voltage, and during the second phase, the higher potential terminal of the first capacitor is coupled to the output voltage and the lower potential terminal of the first capacitor is coupled to the input voltage.

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Patent Owner(s)

Patent OwnerAddress
APPLE INC1 INFINITE LOOP CUPERTINO CA 94085-4040

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Athas, William C San Jose, US 84 1672
Ungar, P Jeffrey Sunnyvale, US 45 572

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