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US 9,425,685 B2Granted
DC-DC voltage converter and conversion method
AssigneeNXP B.V.
InventorMelaine Philip
Life of this patent
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Abstract
A DC-DC converter uses a switched capacitor arrangement. A filter capacitor is connected between one terminal of the capacitor arrangement and a fixed voltage line and a calibration arrangement is used for setting or enabling selection of the capacitance of the filter capacitor. In this way, a capacitance is added to a terminal of the switched capacitor arrangement. The capacitance value can be chosen or adjusted to keep the DC-DC converter current capability within specification limits.
Claims15
A DC-DC converter, comprising:
- a switched capacitor arrangement that includes a switching capacitor connected between a plurality of switches, the switched capacitor arrangement configured and arranged to operate in a first phase during which the switching capacitor is charged by an input to the DC-DC converter and a second phase during which the switching capacitor is discharged to an output of the DC-DC converter;
- a filter capacitor connected between one terminal of the switching capacitor arrangement and a fixed voltage line;
- and
- a calibration arrangement configured to determine and adjust a capacitance of the filter capacitor.
1 more element
A DC-DC conversion method, comprising:
- performing a calibration of a DC-DC converter, which comprises a switched capacitor arrangement that includes a switching capacitor connected between a plurality of switches, the switched capacitor arrangement configured and arranged to operate in a first phase during which the switching capacitor is charged and a second phase during which the switching capacitor is discharged to an output of the DC-DC converter;
- determining and adjusting a capacitance of a filter capacitor connected between one terminal of the switching capacitor arrangement and a fixed voltage line.
Dependencies are inferred from the claim text.