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US 9,287,781 B2Granted
Single inductor multiple output converter
AssigneeQUALCOMM Incorporated
InventorMartin Paul Wilson
Life of this patent
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Abstract
There is disclosed a buck-boost converter comprising a voltage generation apparatus comprising: a voltage source; an inductor, wherein a first terminal of the inductor is switchably connected to the voltage source; and a plurality of capacitors switchably connected to a second terminal of the inductor, wherein a respective plurality of voltages are formed across the plurality of capacitors.
Claims19
A voltage generation apparatus comprising:
- a voltage source;
- an inductor, having a first terminal connected by a first switch to the voltage source connected by a fourth switch to electrical ground, and a second terminal connected by a third switch to electrical ground;
- a plurality of capacitors each having a first terminal connected by a second switch to the second terminal of the inductor, wherein a respective plurality of voltages are formed across the plurality of capacitors, each voltage being independently regulated by a connection of the first terminal of the inductor to the voltage source, wherein each of the plurality of capacitors is electrically connected to the second terminal of the inductor in a cycle;
- and
- a controller for selecting between a buck mode and a boost mode on initiation of each cycle in dependence upon a relationship between a supply voltage of the voltage source and a time average voltage based on the plurality of voltages across the plurality of capacitors in a period of the cycle.
2 more elements
A method of generating a plurality of voltages in a voltage generation apparatus comprising:
- selectively connecting a voltage source to a first terminal of an inductor;
- selectively connecting a second terminal of the inductor to electrical ground;
- selectively connecting the first terminal of the inductor to electrical ground;
- selectively connecting one of a plurality of capacitors to the second terminal of the inductor, wherein a respective plurality of voltages are formed across the plurality of capacitors, each voltage being independently regulated by a connection of the first terminal of the inductor to the voltage source;
- electrically connecting each of the plurality of capacitors to the second terminal of the inductor in a cycle;
- and
- selecting between a buck mode and a boost mode on initiation of each cycle in dependence upon a relationship between a supply voltage of the voltage source and a time average voltage based on the plurality of voltages across the plurality of capacitors in a period of the cycle.
4 more elements
Dependencies are inferred from the claim text.