Current regulator circuits with self-adaptive power offloading
AssigneeInfineon Technologies AG
InventorsMattia Montoncelli, Maurizio Galvano, Christos Konstantopoulos, Roberto Penzo, Enrico Tonazzo
Life of this patent
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Abstract
A circuit may be configured to deliver current to one or more light emitting diodes (LEDs). The circuit may comprise a first current path configured to deliver a first current to the one or more LEDs, and a second current path in parallel with the first current path, wherein the second current path is configured to deliver a second current through a voltage drop element and to the one or more LEDs. According to this disclosure, a sum of the first current and the second current is regulated based on a sensed current through the circuit.
Claims22
A circuit configured to deliver current to one or more light emitting diodes (LEDs), the circuit comprising:
- a first current path configured to deliver a first current to the one or more LEDs;
- a second current path in parallel with the first current path, wherein the second current path is configured to deliver a second current through a voltage drop element and to the one or more LEDs, wherein a sum of the first current and the second current is regulated based on a sensed current through the circuit;
- an output pin positioned on a first supply side of the first current path, wherein the output pin is configured to be connected to the one or more LEDs;
- a power pin positioned on the first supply side of the second current path, wherein the power pin is configured to be connected to the voltage drop element, wherein the voltage drop element is connected in series with the one or more LEDs;
- and
- a current sense pin positioned on a second supply side of the first current path and the second supply side of the second current path, wherein the current sense pin is configured to be connected to a current sense resistor.
(canceled)
A circuit configured to deliver current to one or more light emitting diodes (LEDs), the circuit comprising:
- a first current path configured to deliver a first current to the one or more LEDs;
- a second current path in parallel with the first current path, wherein the second current path is configured to deliver a second current through a voltage drop element and to the one or more LEDs, wherein a sum of the first current and the second current is regulated based on a sensed current through the circuit
- an output pin positioned on a first supply side of the first current path and the second current path, wherein the output pin is configured to be connected to the one or more LEDs;
- a power pin positioned on a second supply side of the second current path, wherein the power pin is configured to be connected to the voltage drop element, wherein the voltage drop element is connected in series with a current sense resistor;
- and
- a current sense pin positioned on second supply side of the first current path, wherein the current sense pin is configured to be connected to the current sense resistor.
19-20. (canceled)
Dependencies are inferred from the claim text.