Abstract: An integrated multi-layered lighting system includes a first board having a first component area and a first light area, a second board coupled to and offset from the first board, the second board having a first opening overlapping the first light area of the first board in a plan view, and a second component area overlapping the first component area of the first board in a plan view, a plurality of light emitting diodes (LEDs) coupled to the first board and positioned in the first light area corresponding to the first opening of the second board, and a light driver configured to drive the plurality of LEDs and including a plurality of first components coupled to the first board and positioned in the first component area and a plurality of second components coupled to the second board and positioned in the second component area.

Abstract: A method of driving a light source by a light driver includes measuring a current output signal of the light driver, calculating a percent change in output signal, determining whether the percent change in output signal is greater than or equal to a first threshold, and in response to determining that the percent change in the output signal is greater than or equal to the first threshold, calculating a percent change in reference voltage based on a current reference voltage and a previous reference voltage, determining whether the percent change in reference voltage is less than a second threshold, and in response to determining that the percent change in reference voltage is less than the second threshold, deactivating filtering and averaging of a dimmer signal received from a dimmer for a period of time, and reactivating the filtering and the averaging of the dimmer signal.

Abstract: A light driver includes a pulse generator circuit configured to generate a pulsed signal based on a rectified input line voltage, a dimming detection circuit configured to determine whether phase-cut dimming is present at an input of the light driver based on the pulsed signal and to generate a phase-cut detection signal, and an input selection circuit configured to apply a first voltage or a second voltage to a reference input of a power factor correction (PFC) circuit of the light driver based on the phase-cut detection signal.

Abstract: A method of initiating power-on of a light driver for driving a light source, the method including retrieving a stored load voltage of the light driver from a memory, determining a turn-on delay based on the stored load voltage, stalling power-on of the light driver for a period of time equal to the turn-on delay, initiating startup of the light driver based on the stored load voltage, determining whether current is flowing to the light source, in response to determining that current is flowing to the light source, measuring a load voltage of the light driver, and storing the load voltage in the memory.

Abstract: A multi-channel power supply system including a power supply circuit configured to generate a drive signal for powering a plurality of color channels based on an input power signal, a first current control circuit coupled to a first color channel of the plurality of color channels and configured to adjust a first channel current of the first color channel based on the drive signal and a first reference signal, and a channel controller configured generate the first reference signal based on a color temperature according to a black body curve.

Abstract: A multi-channel power supply system includes a power supply circuit configured to generate a drive signal for powering a plurality of color channels based on an input power signal, a channel controller configured to generate a first pulse width modulated (PWM) signal for controlling an output light intensity of a first color channel of the plurality of color channels, a filter circuit configured to generate a first pseudo-sawtooth signal based on the first PWM signal, and a first current control circuit coupled to a first color channel of the plurality of color channels and configured to adjust a first channel current of the first color channel based on the drive signal and the first pseudo-sawtooth signal.

Abstract: An integrated multi-layered lighting system includes a first board having a first component area and a first light area, a second board coupled to and offset from the first board, the second board having a first opening overlapping the first light area of the first board in a plan view, and a second component area overlapping the first component area of the first board in a plan view, a plurality of light emitting diodes (LEDs) coupled to the first board and positioned in the first light area corresponding to the first opening of the second board, and a light driver configured to drive the plurality of LEDs and including a plurality of first components coupled to the first board and positioned in the first component area and a plurality of second components coupled to the second board and positioned in the second component area.

Abstract: A lighting system includes a light engine including a correlated color temperature (CCT) terminal configured to transmit a first power signal having a first variance and to receive a CCT signal, the light engine being configured to emit light according to the CCT signal, and a CCT clamp coupled to the CCT terminal, and configured to receive the first power signal and to generate the CCT signal having a second variance, the first variance of the first power signal being greater than the second variance of the CCT signal.

Abstract: A multi-channel power supply system including a power supply circuit configured to generate a drive signal for powering a plurality of color channels based on an input power signal, a first current control circuit coupled to a first color channel of the plurality of color channels and configured to adjust a first channel current of the first color channel based on the drive signal and a first reference signal, and a channel controller configured generate the first reference signal based on a color temperature according to a black body curve.

Abstract: A multi-channel power supply system includes a power supply circuit configured to generate a drive signal for powering a plurality of color channels based on an input power signal, a channel controller configured to generate a first pulse width modulated (PWM) signal for controlling an output light intensity of a first color channel of the plurality of color channels, a filter circuit configured to generate a first pseudo-sawtooth signal based on the first PWM signal, and a first current control circuit coupled to a first color channel of the plurality of color channels and configured to adjust a first channel current of the first color channel based on the drive signal and the first pseudo-sawtooth signal.

Abstract: A light driver includes a pulse generator circuit configured to generate a pulsed signal based on a rectified input line voltage, a dimming detection circuit configured to determine whether phase-cut dimming is present at an input of the light driver based on the pulsed signal and to generate a phase-cut detection signal, and an input selection circuit configured to apply a first voltage or a second voltage to a reference input of a power factor correction (PFC) circuit of the light driver based on the phase-cut detection signal.

Abstract: A light driver includes a converter configured to generate a drive current based on a rectified input signal for driving a light source, and an output correction circuit coupled to an output of the converter and configured to measure the drive current and to generate a correction signal to dynamically control a DC-level of the drive current of the converter based on the drive current and a reference signal corresponding to a desired DC-level of the drive current.

Abstract: An active gain control circuit includes a dynamic voltage divider having a variable resistance configured to attenuate a rectified input line voltage to produce a reference signal, a filter-divider circuit configured to extract a DC-level attenuated reference voltage from the reference signal, and an operational amplifier configured to receive the DC-level attenuated reference voltage and a regulation voltage, and to generate a gate control signal based on a difference between the regulation voltage and the DC-level attenuated reference voltage, the variable resistance of the dynamic voltage divider being controlled by the gate control signal, and a comparison voltage generator configured to attenuate a comparison voltage to generate the regulation voltage.

Abstract: A multi-channel power supply system includes a power supply circuit configured to generate a drive signal for powering a plurality of color channels based on an input power signal, a first current control circuit coupled to a first color channel of the plurality of color channels and configured to adjust a first channel current of the first color channel based on the drive signal and a first reference signal, and to generate a feedback signal to control the drive signal of the power supply circuit, and a channel controller configured generate the first reference signal based on a color temperature according to a black body curve.

Abstract: A programmable lighting system includes a plurality of color channels configured to generate light of different colors, and a light driver configured to drive the plurality of color channels according to a dimmer setting and a correlated color temperature (CCT) setting, and to maintain a constant maximum lumen output across a range of CCT values based on a dim-stop limit.

Abstract: According to some embodiments, there is provided a power supply system including a converter configured to generate an output signal based on a rectified input signal for driving a light source, an output correction circuit coupled to an output of the converter and configured to measure a ripple in the output signal and to generate a correction signal to dynamically control a DC-level of the output signal of the converter based on the measured ripple and a reference signal corresponding to a desired DC-level of the output signal.

Abstract: A lighting system includes a light engine including a correlated color temperature (CCT) terminal configured to transmit a first power signal having a first variance and to receive a CCT signal, the light engine being configured to emit light according to the CCT signal, and a CCT clamp coupled to the CCT terminal, and configured to receive the first power signal and to generate the CCT signal having a second variance, the first variance of the first power signal being greater than the second variance of the CCT signal.

Abstract: A programming device includes a plurality of signal lines including a first signal line and a common ground line, and a first programming circuit coupled between the first signal line and the common ground line, and including a first configurable switch configured to receive a first switch configuration, the first programming circuit being configured to receive a first power signal from the first signal line and to supply a first programming signal to the first signal line, the first programming signal having a level corresponding to the first switch configuration.

Abstract: An integrated multi-layered lighting system includes a first board having a first component area and a first light area, a second board coupled to and offset from the first board, the second board having a first opening overlapping the first light area of the first board in a plan view, and a second component area overlapping the first component area of the first board in a plan view, a plurality of light emitting diodes (LEDs) coupled to the first board and positioned in the first light area corresponding to the first opening of the second board, and a light driver configured to drive the plurality of LEDs and including a plurality of first components coupled to the first board and positioned in the first component area and a plurality of second components coupled to the second board and positioned in the second component area.

Abstract: A method of driving a light source by a light driver includes measuring a current output signal of the light driver, calculating a percent change in output signal, determining whether the percent change in output signal is greater than or equal to a first threshold, and in response to determining that the percent change in the output signal is greater than or equal to the first threshold, calculating a percent change in reference voltage based on a current reference voltage and a previous reference voltage, determining whether the percent change in reference voltage is less than a second threshold, and in response to determining that the percent change in reference voltage is less than the second threshold, deactivating filtering and averaging of a dimmer signal received from a dimmer for a period of time, and reactivating the filtering and the averaging of the dimmer signal.