Load control device having a wide output range

A load control device for controlling the intensity of a lighting load, the load control device comprising:

• a load regulation circuit configured to control the magnitude of a load current conducted through the lighting load to adjust the intensity of the lighting load;
• a filter circuit configured to receive a current feedback signal from the load regulation circuit and to filter the current feedback signal to generate a filtered feedback signal;
• and
• a control circuit operatively coupled to the load regulation circuit for controlling the magnitude of the load current towards a target current in response to the filtered feedback signal;
• wherein the control circuit is configured to adjust an operating frequency of the load regulation circuit in response to the target current when the magnitude of the target current of the lighting load is less than a transition current, the control circuit configured to control the filter circuit to filter the current feedback signal during a filter window that repeats on a periodic basis when the magnitude of the target current of the lighting load is less than the transition current, the control circuit configured to control the filter circuit to constantly filter the current feedback signal when the magnitude of the target current of the lighting load is greater than the transition current.

A load control device for controlling the intensity of a lighting load, the load control device comprising:

• a load regulation circuit configured to control the magnitude of a load current conducted through the lighting load to adjust the intensity of the lighting load between a low-end intensity and a high-end intensity;
• a filter circuit configured to receive a current feedback signal from the load regulation circuit and to filter the current feedback signal to generate a filtered feedback signal;
• and
• a control circuit operatively coupled to the load regulation circuit for controlling the magnitude of the load current towards a target current in response to the filtered feedback signal;
• wherein the control circuit is configured to adjust an operating frequency of the load regulation circuit in response to the target current when the magnitude of the target current is less than a transition current, the control circuit configured to generate a filter control signal for controlling the filter circuit to filter the current feedback signal during a filter window that repeats on a periodic basis when the magnitude of the target current is less than a transition current, the control circuit configured to control the filter control signal to have a maximum duty cycle when the magnitude of the target current is greater than the transition current.