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US 2011/0084675 A1Published application
Booster circuit
AssigneeRenesas Electronics Corporation
InventorHirokazu Kawagoshi
Life of this patent
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Abstract
A booster circuit according to the present invention includes a booster that connects a boosting condenser that is charged and a direct-current power source in series through a switch for a boosting operation in order to generate a boosted voltage and charges a smoothing condenser with the boosted voltage through a switch for an outputting operation. The switch for the boosting operation is composed of a plurality of switches connected in parallel and at least one of the plurality of switches can be controlled independently.
Claims11
A booster circuit comprising:
- a booster that connects a charged boosting condenser and a direct-current power source in series through a switch for a boosting operation to generate a boosted voltage and charges a smoothing condenser with the boosted voltage through a switch for an outputting operation,
- wherein the switch for the boosting operation is composed of a plurality of switches connected in parallel and at least one of the plurality of switches can be controlled independently.
A booster circuit comprising:
- a boosting condenser;
- and
- a control circuit that switches a charging operation and a boosting operation, the charging operation is the one in which the boosting condenser is connected to a first path between a first voltage and a second voltage lower than the first voltage to charge the boosting condenser, a boosting operation is the one in which a connection destination of a lower side of the charged boosting condenser is switched from the second voltage to the first voltage or a third voltage higher than the first voltage to generate a boosted voltage at a higher side of the boosting condenser,
- wherein the control circuit varies a resistance of a boosting path that connects the lower side of the boosting condenser with the first voltage or the third voltage according to a voltage in the higher side of the boosting condenser in the boosting operation.
1 more element
Dependencies are inferred from the claim text.