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US 12,120,790 B2Granted
Two-stage power supply architecture with flyback/LLC and buck converter for led display
AssigneeTexas Instruments Incorporated
InventorYang Wu
Life of this patent
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Abstract
In an example, a system includes a single-output flyback/LLC converter adapted to be coupled to an alternating current (AC) power supply. The system also includes a buck regulator coupled to the single-output flyback/LLC converter. The system includes a first LED including an anode coupled to the single-output flyback/LLC converter and a cathode coupled to the buck regulator. The system also includes a second LED including an anode coupled to the single-output flyback/LLC converter and a cathode coupled to a ground terminal.
Claims19
A system, comprising:
- a single-output voltage converter having a converter output and first and second converter inputs, wherein the first converter input is adapted to be coupled to an alternating current (AC) power supply, and the second converter input is coupled to a ground terminal;
- a buck regulator having first and second buck inputs and a buck output, wherein the first buck input is coupled to the converter output, and the second buck input is coupled to the second converter input;
- a first light emitting diode (LED) having a first anode and a first cathode, wherein the first anode is coupled to the converter output, and the first cathode is coupled to the buck output;
- and
- a second LED having a second anode and a second cathode, wherein the second anode is coupled to the converter output, and the second cathode is coupled to the second converter input and the ground terminal.
2 more elements
A system, comprising:
- a single-output voltage converter having a converter output and first and second converter inputs, wherein the first converter input is adapted to be coupled to an alternating current (AC) power supply, and the second converter input is coupled to a ground terminal;
- a buck regulator having first and second buck inputs and a buck output, wherein the first buck input is coupled to the converter output, and the second buck input is coupled to the second converter input and the ground terminal;
- a first light emitting diode (LED) having a first anode and a first cathode, wherein the first anode is coupled to the buck output, and the first cathode is coupled to the ground terminal;
- and
- a second LED having a second anode and a second cathode, wherein the second anode is coupled to the converter output, and the second cathode is coupled to the second converter input and the ground terminal.
2 more elements
A system, comprising:
- a single-output voltage converter having a converter output and first and second converter inputs, wherein the first converter input is adapted to be coupled to an alternating current (AC) power supply, the second converter input is coupled to a ground terminal, and the single-output voltage converter is configured to provide a first voltage at the converter output;
- a buck regulator having first and second buck inputs and a buck output, wherein the first buck input is coupled to the converter output, the second buck input is coupled to the second converter input, and the buck regulator is configured to provide a second voltage at the buck output;
- a first load having first and second load terminals, wherein the first load terminal is coupled to the converter output, and the second load terminal is coupled to the second buck input and the ground terminal;
- and
- a second load having third and fourth load terminals, wherein the third load terminal is coupled to the converter output, and the fourth load terminal is coupled to the buck output.
2 more elements
Dependencies are inferred from the claim text.