Abstract: The present disclosure provides a dynamic pulse width modulation (PWM) system that includes current frequency determination circuitry to determine a DC value of a source current, and to determine a frequency of the source current generate a plurality of pulses from an AC power source; and PWM generation circuitry to generate a first PWM signal having a first frequency based on the DC value of the current source; the PWM circuitry also to generate a second PWM signal having a second frequency based on the frequency of the current source; wherein the first frequency is less than the second frequency.

Abstract: System and method for dimming solid-state lighting (SSL) avoids visual anomalies such as flicker for different types of SSL fixtures. This ability to avoid visual anomalies allows the system and method to be compatible with virtually any SSL fixture from any manufacturer. A controller is provided in some implementations that automatically generates a dimming voltage for the SSL fixtures based on a dimming control signal. A skip-phase dimming module is provided in some implementations that operates in conjunction with the controller to automatically skip dimming levels that cause visual anomalies in the SSL fixtures. A wireless module is provided in some implementations to receive signals from remote sensors and other input devices, such as ambient light sensors, occupancy sensors, color sensors, and the like.

Abstract: A dimmable LED lighting system includes first, second and third types of LED light sources, and an LED driver to control the supply of current on first, second and third channels, respectively to the first, second and third types of LED light sources. The first, second and third types of LED light sources are selected according to their spectral power distribution (SPD) curves. The selected SPD curves together model a dimming color curve that is characteristic of an incandescent light source when the first, second and third types of LED light sources are separately driven with current at predefined power ratios that correspond to dimming levels over a dimming region of the dimming color curve. The dimmable LED lighting system can have a color rendering index Ra greater than 80 over the dimming region.

Abstract: An LED driver circuit provides dimming control in LED lighting applications that can accommodate an AC/DC constant voltage converter. The driver circuit provides a dimming control signal that is used to directly control the DC output current of a downstream DC/DC converter driving an LED array. The dimming control signal tracks the AC or DC output from a dimming controller such that variations in the AC or DC voltage are reflected in the dimming control signal. This dimming control signal is then provided to the downstream DC/DC converter, bypassing the AC/DC constant voltage converter to directly control dimming of the LED array. Such an arrangement lets lighting design engineers deploy the familiar and well-understood constant voltage converter topology in LED lighting applications while retaining the ability to control dimming in the LED lighting applications.