| 摘要 |
A system and method are provided for powering a lighting device having one or more arrays of LEDs. Three current sourcing circuits each include a switching element having a source coupled to an input power source. A microcontroller includes a processor, a communications module, an internal clock oscillator, a counter, and program instructions executable to cause the processor to carry out the control functions. Desired light intensity levels are stored as individual output level data, and pulse density modulated output values are generated for each of the stored output level data using carry overflow logic. The generated output values are converted to output signals and provided to the respective current sourcing circuits, wherein current is sourced through the switching elements to respective LEDs of a given color based on a pulse density modulated signal applied to the gates of the respective switching elements.
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