Dual-output switched-capacitor power converter
AssigneeEmpower Semiconductor, Inc.
InventorBai NGUYEN
Life of this patent
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Abstract
A power converter circuit is disclosed. In one aspect, the power converter circuit includes a power input terminal, a first output terminal and a second output terminal, a plurality of capacitors coupled to the power input terminal, the first output terminal and the second output terminal, a plurality of switches coupled to the plurality of capacitors and arranged to repetitively cycle the plurality of capacitors between a first configuration and a second configuration to generate a first output voltage at the first output terminal and a second output voltage at the second output terminal, and where the circuit is arranged to limit a maximum voltage applied to each of the plurality of capacitors and switches to a fraction of a voltage at the power input terminal.
Claims20
A circuit comprising:
- a power input terminal, a first output terminal and a second output terminal;
- a plurality of capacitors coupled to the power input terminal, the first output terminal and the second output terminal;
- and
- a plurality of switches coupled to the plurality of capacitors and arranged to repetitively cycle the plurality of capacitors between a first configuration and a second configuration to generate a first output voltage at the first output terminal and a second output voltage at the second output terminal, and arranged to connect at least one capacitor from the plurality of capacitors between the first output terminal and the second output terminal such that a current from the first output terminal is circulated to the second output terminal.
A circuit comprising:
- a power input terminal, a first output terminal and a second output terminal;
- a plurality of capacitors coupled to the power input terminal, the first output terminal and the second output terminal;
- a plurality of switches coupled to the plurality of capacitors and arranged to repetitively cycle the plurality of capacitors between a first configuration and a second configuration to generate a first output voltage at the first output terminal and a second output voltage at the second output terminal;
- and
- wherein a cross regulation balances a strength at the first output terminal and the second output terminal, thereby reducing voltage variation of the first and second output voltages.
A method of operating a circuit, the method comprising:
- providing a power input terminal, a first output terminal and a second output terminal;
- providing a plurality of capacitors coupled to the power input terminal, the first output terminal and the second output terminal;
- providing a plurality of switches coupled to the plurality of capacitors;
- repetitively cycling, by the plurality of switches, the plurality of capacitors between a first configuration and a second configuration to generate a first output voltage at the first output terminal and a second output voltage at the second output terminal;
- and
- connecting at least one capacitor from the plurality of capacitors between the first output terminal and the second output terminal such that a current from the first output terminal is circulated to the second output terminal.
Dependencies are inferred from the claim text.