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US 8,710,822 B2Granted
Multi-state DC-DC converter having undirectional switches
AssigneeAnalog Devices, Inc.
InventorUlrik Sørensen Wismar
Life of this patent
Estimating the term…
Abstract
DC-DC converters adapted to provide two or more DC output voltages. More particularly, a multi-state or mode DC-DC converter circuit comprising first and second controllable switches configured for unidirectional conduction of charging current.
Claims20
A DC-DC converter circuit comprising:
- a first coupling terminal of a first end of an inductive component and a second coupling terminal of a second end of the inductive component;
- a DC supply terminal to receive a DC input supply voltage;
- first, second, third, fourth and fifth switches including respective control terminals to select states of the first, second, third, fourth and fifth switches;
- a first output terminal connected to a first capacitor and serving as a positive DC voltage node relative to a ground terminal;
- a second output terminal connected to a second capacitor and serving as a negative DC voltage node relative to the ground terminal;
- and
- a digital controller coupled to the respective control terminals of the first, second, third, fourth and fifth switches so as to control the respective states thereof;
- wherein the first switch is arranged between the second capacitor and the first coupling terminal of the inductive component, the second switch is arranged between the first capacitor and the second coupling terminal of the inductive component, the third switch is coupled between the DC supply terminal and the first coupling terminal of the inductive component, the fourth switch is coupled between the first coupling terminal of the inductive component and ground, and the fifth switch is coupled between the second coupling terminal of the inductive component and ground;
- wherein the inductive component is coupled between the first and second capacitors for supplying charging current to at least one of the first and second capacitors in at least a first, a second, and a third converter state under control of the digital controller;
- wherein in the first converter state, the second and third switches are set to respective closed states to supply charging current to the first capacitor through the inductive component;
- in the second converter state, the first and fifth switches are set to respective closed states to supply charging current to the second capacitor through the inductive component;
- in the third converter state, the first switch and the second switch are set to respective closed states to supply charging current from the first capacitor to the second capacitor through the first and second coupling terminals of the inductive component;
- and the first and second switches are unidirectional current conduction devices.
10 more elements
A class-H amplifier assembly comprising:
- a DC-DC converter circuit including:
- a first coupling terminal of a first end of an inductive component and a second coupling terminal of a second end of the inductive component;
- a DC supply terminal to receive a DC input supply voltage;
- first, second, third, fourth and fifth switches including respective control terminals to select states of the first, second, third, fourth and fifth switches;
- a first output terminal connected to a first capacitor and serving as a positive DC voltage node relative to a ground terminal;
- a second output terminal connected to a second capacitor and serving as a negative DC voltage node relative to the ground terminal;
- and
- a digital controller coupled to the respective control terminals of the first, second, third, fourth and fifth switches so as to control the respective states thereof;
- wherein the first switch is arranged between the second capacitor and the first coupling terminal of the inductive component, the second switch is arranged between the first capacitor and the second coupling terminal of the inductive component, the third switch is coupled between the DC supply terminal and the first coupling terminal of the inductive component, the fourth switch is coupled between the first coupling terminal of the inductive component and ground, and the fifth switch is coupled between the second coupling terminal of the inductive component and ground;
- wherein the inductive component is coupled between the first and second capacitors for supplying charging current to at least one of the first and second capacitors in at least a first, a second, and a third converter state under control of the digital controller;
- wherein in the first converter state, the second and third switches are set to respective closed states to supply charging current to the first capacitor through the inductive component;
- in the second converter state, the first and fifth switches are set to respective closed states to supply charging current to the second capacitor through the inductive component;
- in the third converter state, the first switch and the second switch are set to respective closed states to supply charging current from the first capacitor to the second capacitor through the first and second coupling terminals of the inductive component;
- and the first and second switches are unidirectional current conduction devices;
- and
- a H-class amplifier including a positive DC power supply rail and a negative DC power supply rail, the positive DC voltage node and the negative DC voltage node of the DC-DC converter circuit being coupled to the positive and negative DC power supply rails, respectively.
13 more elements
A DC-DC converter circuit, comprising:
- an inductive component;
- first and second capacitors;
- first and second switches connecting the first and second capacitors to first and second terminals of the inductive component, the first and second switches including control terminals and being unidirectional current conduction devices;
- a DC supply terminal to receive a DC input supply voltage;
- a third switch connecting the DC supply terminal to the first terminal of the inductive component;
- fourth and fifth switches connecting the first and second terminals of the inductive component to ground;
- first and second DC voltage output terminals connected to the first and second capacitors;
- and
- a digital controller coupled to the control terminals of the first, second, third, fourth and fifth switches to control states thereof.
6 more elements
Dependencies are inferred from the claim text.