Load control device for controlling a driver for a lighting load
First Claim
1. A load control device for controlling a load regulation device adapted to control power delivered from a power source to an electrical load, the load control device comprising:
- first and second control terminals adapted to be coupled to the load regulation device for providing a control signal to the load regulation device;
a control circuit configured to generate an output signal for controlling a magnitude of the control signal to a desired magnitude, the desired magnitude indicating a target amount of power to be delivered to the electrical load; and
a communication circuit coupled to the control circuit for receiving the output signal and to the first and second control terminals for generating the control signal, the communication circuit comprising a current sink circuit that is adapted to receive a link supply voltage across the first and second control terminals from the load regulation device, and the current sink circuit configured to sink current through the load regulation device to generate the control signal;
wherein the control circuit is further configured to;
receive a feedback signal indicating the magnitude of the control signal;
determine a difference between the magnitude of the control signal and the desired magnitude; and
adjust the magnitude of the output signal in response to the difference between the magnitude of the control signal and the desired magnitude, so as to adjust the magnitude of the control signal towards the desired magnitude.
2 Assignments
0 Petitions
Accused Products
Abstract
A load control device is configured to generate a control signal having a desired magnitude for controlling a load regulation device adapted to control the power delivered to an electrical load. The load control device may comprise a control terminal arranged to provide the control signal to the load regulation device, a communication circuit for generating the control signal, and a control circuit configured to generate an output signal that is provided to the communication circuit. The communication circuit may be characterized by non-linear operation. The control circuit may adjust the magnitude of the output signal in response to the difference between the magnitude of the control signal and the desired magnitude to adjust the magnitude of the control signal towards the desired magnitude. The control circuit may also be configured to determine if an incompatible load regulation device is coupled to the load control device.
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Citations
23 Claims
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1. A load control device for controlling a load regulation device adapted to control power delivered from a power source to an electrical load, the load control device comprising:
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first and second control terminals adapted to be coupled to the load regulation device for providing a control signal to the load regulation device; a control circuit configured to generate an output signal for controlling a magnitude of the control signal to a desired magnitude, the desired magnitude indicating a target amount of power to be delivered to the electrical load; and a communication circuit coupled to the control circuit for receiving the output signal and to the first and second control terminals for generating the control signal, the communication circuit comprising a current sink circuit that is adapted to receive a link supply voltage across the first and second control terminals from the load regulation device, and the current sink circuit configured to sink current through the load regulation device to generate the control signal; wherein the control circuit is further configured to; receive a feedback signal indicating the magnitude of the control signal; determine a difference between the magnitude of the control signal and the desired magnitude; and adjust the magnitude of the output signal in response to the difference between the magnitude of the control signal and the desired magnitude, so as to adjust the magnitude of the control signal towards the desired magnitude. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A load control device for controlling a load regulation device adapted to control power delivered from an AC power source to an electrical load, the load control device comprising:
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first and second control terminals adapted to be coupled to the load regulation device for providing a control signal to the load regulation device; a control circuit configured to generate an output signal for controlling a magnitude of the control signal to a desired magnitude, the desired magnitude indicating a target amount of power to be delivered to the electrical load; and a communication circuit coupled to the control circuit for receiving the output signal and to the first and second control terminals for generating the control signal, the communication circuit comprising a current sink circuit that is adapted to receive a link supply voltage across the first and second control terminals from the load regulation device, and the current sink circuit configured to sink current through the load regulation device to generate the control signal; a photodetector configured to detect a light level in the vicinity of the load control device; and wherein the control circuit is further configured to; adjust the magnitude of the output signal through a plurality of values; determine a light level at each of the plurality of values of the output signal using the photodetector; and correlate the light levels and the plurality of values of the output signal to determine a dimming curve model for the load regulation device and electrical load. - View Dependent Claims (20, 21, 22, 23)
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Specification