Techniques for assessing condition of leds and power supply

A lighting system, comprising:

• a plurality of light emitting diodes (LEDs);
• a switch-mode power supply for providing power to the LEDs, and including an output capacitor;
• a switch-off detection circuit configured to detect switch-off time in the switch-mode power supply, and to output a trigger signal in response to detecting switch-off time;
• and
• a controller configured to collect, in response to receiving the trigger signal, data from which conditions of the lighting system can then be assessed for desired performance;
• wherein the conditions of the lighting system to be assessed are with respect to at least one of the output capacitor of the switch-mode power supply and the LEDs.

A lighting system, comprising:

• a plurality of light emitting diodes (LEDs);
• a switch-mode power supply for providing power to the LEDs, and including an output capacitor;
• a switch-off detection circuit configured to detect switch-off time in the switch-mode power supply, and to output a trigger signal in response to detecting switch-off time, wherein the switch-off detection circuit receives a signal that indicates the switching frequency of the switch-mode power supply, and at least one of rectifies and/or high-pass filters that signal, and compares the resulting signal to a reference voltage to identify off-states of the switch-mode power supply;
• and
• a controller configured to periodically collect, in response to receiving the trigger signal, data from which conditions of the lighting system can then be assessed for desired performance, wherein the data collected by the controller includes two voltages V1 and V2 collected by corresponding first and second analog-to-digital converters of the controller, wherein the voltage V1 corresponds to voltage across light emitting diodes of the lighting system and voltage V2 corresponds to output capacitor discharge current of the switch-mode power supply;
• wherein the conditions of the lighting system to be assessed are with respect to at least one of the output capacitor of the switch-mode power supply and the LEDs.