Abstract: Exemplary systems, methods and apparatuses for providing dimming in a distributed solid-state lighting system are disclosed. An exemplary dimming signal generator is coupleable to a controller or a current generator for a plurality of LEDs, and includes a first resistive voltage divider to sense an input DC voltage; a current sensor to sense a current level of the plurality of LEDs; a first operational amplifier to compare the sensed input DC voltage to a reference voltage level and to provide a comparator output signal; and a current path to combine the comparator output signal with the sensed LED current level to provide a combined signal for current level feedback for control of the LED current level. The dimming signal generator may optionally include other components to generate a PWM signal and also to provide a resistive network to divert LED current in response to the comparator output signal.

Abstract: Exemplary systems, methods and apparatuses for providing dimming in a distributed solid-state lighting system are disclosed. An exemplary dimming signal generator is coupleable to a controller or a current generator for a plurality of LEDs, and includes a first resistive voltage divider to sense an input DC voltage; a current sensor to sense a current level of the plurality of LEDs; a first operational amplifier to compare the sensed input DC voltage to a reference voltage level and to provide a comparator output signal; and a current path to combine the comparator output signal with the sensed LED current level to provide a combined signal for current level feedback for control of the LED current level. The dimming signal generator may optionally include other components to generate a PWM signal and also to provide a resistive network to divert LED current in response to the comparator output signal.