Abstract: A device, system, and method protect circuits of a lighting device. The lighting device includes a current source generating a current and a first load and a second load receiving the current. The lighting device includes an inductor positioned between the current source and the first and second loads that balances the current powering the first and second loads. The lighting device includes a detector monitoring a voltage peak of the first 5 and second loads. The lighting device includes a voltage controller receiving a reading of the voltage peak from the detector and determining when the voltage peak is at least a voltage peak threshold. The voltage controller is configured to adjust a setting for the current generated by the current source based on the reading of the voltage peak.

Abstract: A secondary side controller configured to determine a peak voltage and/or a frequency of a secondary side winding of a power supply converter over a predetermined period of time, wherein, when the converter is in the burst mode, the secondary side controller is configured to instruct a primary side controller to increase the set point, such that the primary side controller operates in the standard mode to increase the converted output voltage, the secondary side controller determining the peak voltage and/or the frequency of the secondary side winding while the primary side controller is operating the converter in the standard mode.

Abstract: A device, system and method protects from overvoltages. A power control device includes a component (310) configured to be powered according to a duty cycle. The power control device includes a controller (330) configured to determine the duty cycle that places the component on or off. The power control device includes a comparator (335) configured to determine when the duty cycle is off and an overvoltage is being experienced by the component. When the duty cycle is off and the overvoltage is being experienced by the component, the comparator selects a circuit pathway (345, 350) including a clamping device (350).

Abstract: An isolated converter has a transformer with a primary winding (in a primary side circuit) and a secondary winding magnetically coupled to the primary winding. A first Y-capacitor is electrically connected between the primary side circuit and the secondary winding. The detection circuit is for detecting information at the primary side, preferably information about the input supply received at the input, and more preferably the information is that whether the input supply is an alternating current (AC) supply or a direct current (DC) supply, and the detection circuit includes the first Y-capacitor. The detection circuit enables the detected information to be provided directly to a secondary side controller, without needing opto-isolators or other isolated data transmission.

Abstract: An isolated converter has a transformer with a primary winding (in a primary side circuit) and a secondary winding magnetically coupled to the primary winding. A first Y-capacitor is electrically connected between the primary side circuit and the secondary winding. The detection circuit is for detecting information at the primary side, preferably information about the input supply received at the input, and more preferably the information is that whether the input supply is an alternating current (AC) supply or a direct current (DC) supply, and the detection circuit includes the first Y-capacitor. The detection circuit enables the detected information to be provided directly to a secondary side controller, without needing opto-isolators or other isolated data transmission.

Abstract: An LED power supply, comprising: a power factor correction circuit configured to receive an input signal and provide a DC bus voltage across a DC bus; a converter configured to receive the DC bus voltage and to output a DC output voltage for powering at least one LED, wherein the converter comprises a high-side transistor, wherein the high-side transistor is OFF when the LED power supply is in standby; a voltage sensor being configured to output a voltage sensor output; and a controller configured to receive the voltage sensor output and to output a control signal according to the voltage sensor output, wherein the voltage sensor is positioned in series with the output of the high-side transistor, such that, when the high-side transistor is ON, the voltage sensor output is proportional to the DC bus voltage, and when the transistor is OFF, the voltage sensor is disconnected from the DC bus.

Abstract: A device, system, and method protect circuits of a lighting device. The lighting device includes a current source generating a current and a first load and a second load receiving the current. The lighting device includes an inductor positioned between the current source and the first and second loads that balances the current powering the first and second loads. The lighting device includes a detector monitoring a voltage peak of the first 5 and second loads. The lighting device includes a voltage controller receiving a reading of the voltage peak from the detector and determining when the voltage peak is at least a voltage peak threshold. The voltage controller is configured to adjust a setting for the current generated by the current source based on the reading of the voltage peak.

Abstract: A device, system and method protects from overvoltages. A power control device includes a component (310) configured to be powered according to a duty cycle. The power control device includes a controller (330) configured to determine the duty cycle that places the component on or off. The power control device includes a comparator (335) configured to determine when the duty cycle is off and an overvoltage is being experienced by the component. When the duty cycle is off and the overvoltage is being experienced by the component, the comparator selects a circuit pathway (345, 350) including a clamping device (350).

Abstract: A device, system, and method configure a power supply of a powered device. The powered device includes a digital addressable lighting interface (DALI) connected to a load to be powered by a power source. The powered device includes an isolator. The powered device includes a controller positioned on a primary side of the isolator. The controller is configured to generate a first signal to select whether to provide power to the 5 DALI at a zero current value or a maximum current value. The controller is further configured to generate a second signal to provide power to the DALI at a selected current value between the zero current value and the maximum current value.

Abstract: A lighting driver (300, 400) for driving at least one lighting device (120) includes a control unit (310, 410) disposed on a first side of an electrical isolation barrier (320, 420), and a power supply unit (350, 450) disposed on a second side of the electrical isolation barrier so as to be electrically isolated from the control unit. The control unit supplies a single enable signal (302, 402) across the electrical isolation barrier to the power supply unit. The power supply unit includes a switching circuit (S1/S2) configured to selectively enable and disable, in response to the single enable signal, two output voltages for supplying power to an external device (130) which communicates data with the lighting driver.

Abstract: A lighting driver (300, 400) for driving at least one lighting device (120) includes a control unit (310, 410) disposed on a first side of an electrical isolation barrier (320, 420), and a power supply unit (350, 450) disposed on a second side of the electrical isolation barrier so as to be electrically isolated from the control unit. The control unit supplies a single enable signal (302, 402) across the electrical isolation barrier to the power supply unit. The power supply unit includes a switching circuit (S1/S2) configured to selectively enable and disable, in response to the single enable signal, two output voltages for supplying power to an external device (130) which communicates data with the lighting driver.

Abstract: A lighting driver (500) includes a controller (560) which controls the lighting driver to selectively operate in one of two different states, including a first state (850) wherein the output current is substantially constant regardless of the RMS value of an AC Mains in put voltage (15) applied across AC Mains connection terminals (502), and a second state (860) wherein the slope of the input impedance across the AC Mains connection terminals is maintained to be positive regardless of the AC Mains input voltage. The controller is configured to latch the lighting driver into the second state whenever the RMS value of the AC Mains voltage is less than a minimum RMS threshold voltage for a time period greater than a first threshold time period (TTHRESHOLD_1), or greater than a maximum RMS threshold voltage for a time period greater than a second threshold time period (TTHRESHOLD_2).

Abstract: A programmable lighting device includes a power stage, a controller, a nonvolatile memory and a near field communication device. The power stage is configured to receive power from an external supply and supplying power to at least one light source. The controller is configured to control operation of the power stage according to an operating parameter and/or configuration setting for the programmable lighting device. The nonvolatile memory device stores the operating parameter and/or configuration setting. The near field communication device receives a radio frequency signal which communicates the operating parameter and/or configuration setting, and in response thereto stores the operating parameter and/or configuration setting in the nonvolatile memory. The near field communication device generates a supply voltage for powering the nonvolatile memory device from the RF signal.

Abstract: A programmable lighting device includes a power stage, a controller, a nonvolatile memory and a near field communication device. The power stage is configured to receive power from an external supply and supplying power to at least one light source. The controller is configured to control operation of the power stage according to an operating parameter and/or configuration setting for the programmable lighting device. The nonvolatile memory device stores the operating parameter and/or configuration setting. The near field communication device receives a radio frequency signal which communicates the operating parameter and/or configuration setting, and in response thereto stores the operating parameter and/or configuration setting in the nonvolatile memory. The near field communication device generates a supply voltage for powering the nonvolatile memory device from the RF signal.

Abstract: A programmable lighting device includes a power stage, a controller, a nonvolatile memory and a near field communication device. The power stage is configured to receive power from an external supply and supplying power to at least one light source. The controller is configured to control operation of the power stage according to an operating parameter and/or configuration setting for the programmable lighting device. The nonvolatile memory device stores the operating parameter and/or configuration setting. The near field communication device receives a radio frequency signal which communicates the operating parameter and/or configuration setting, and in response thereto stores the operating parameter and/or configuration setting in the nonvolatile memory. The near field communication device generates a supply voltage for powering the nonvolatile memory device from the RF signal.

Abstract: A programmable lighting device includes a power stage, a controller, a nonvolatile memory and a near field communication device. The power stage is configured to receive power from an external supply and supplying power to at least one light source. The controller is configured to control operation of the power stage according to an operating parameter and/or configuration setting for the programmable lighting device. The nonvolatile memory device stores the operating parameter and/or configuration setting. The near field communication device receives a radio frequency signal which communicates the operating parameter and/or configuration setting, and in response thereto stores the operating parameter and/or configuration setting in the nonvolatile memory. The near field communication device generates a supply voltage for powering the nonvolatile memory device from the RF signal.

Abstract: Drivers for driving light circuits with light emitting diodes include an isolation circuit with a primary part and a secondary part and a guiding circuit for guiding common mode surge signals to a reference potential. The isolation circuit may be configured to guide a first part of the common mode surge signal away from the light circuit, and the guiding circuit may be configured to guide a second part of the common mode surge signal away from the light circuit, the second part being smaller than the first part. The guiding circuit may include one or more capacitors for connecting one or more terminals of the secondary part to the reference potential, where the value(s) of the one or more capacitors is/are larger than values of a parasitic capacitance of the isolation circuit.

Abstract: Drivers (1) for driving light circuits (2) with light emitting diodes comprise isolation circuits (11-14) with primary parts (11,13) and secondary parts (12, 14) and guiding circuits (22, 23) for guiding common mode surge signals to reference potentials. The isolation circuits (11-14) may be designed to guide first parts of the common mode surge signals (3) away from the light circuits (2) and the guiding circuits (22, 23) may be designed to guide second parts of the common mode surge signals (3) away from the light circuits (2), the second parts being smaller than the first parts. The guiding circuit (22, 23) may comprise capacitors (22) for connecting first terminals of the secondary parts (12, 14) to the reference potentials, values of the capacitors (22) being larger than values of parasitic capacitances (41) of the isolation circuits (11-14). The driver (1) does not comprise any capacitor that interconnects the primary and secondary parts (11-14).

Abstract: A lamp driver responsive to a control signal that is variable in a predetermined control range includes a circuit operable in response to a value of the control signal within the predetermined control range to develop a first current and a lamp control voltage dependent upon the value of the control signal. A shutdown interface is operable in response to a value of the control signal outside of the predetermined control range to develop a second current to turn off a lamp.

Abstract: A shut down circuit is disclosed that allows an electronic device such as a lamp driver to be turned-off with a small signal current. The shut down circuit requires only few components and allows a low-power consumption standby state since some or all of functionality of the electronic device can be turned off. In the one embodiment related to a lamp driver, wires of a 0-10V interface or Dali or other existing interface wires can be used so that no additional wires are needed. In addition, the shutdown circuit is galvanically isolated which allows connection to almost any external supply (low or high voltage, AC or DC).