Systems and methods are provided to transmit a data encoded power signal to addressable devices. A data signal includes address and command data that varies between logical states. A controller provides a low loss rectified power signal. The controller further provides data within the power signal by forming a positive polarity rectified power waveform corresponding to data in a first state and a negative polarity rectified waveform signal corresponding to data in a second state using substantially loss-less circuitry.

A driver unit for programming an output current of a driver with an output stage for providing the output current and a primary control stage with a control input for controlling the output current has been provided. The driver unit includes a programmable memory unit for storing data corresponding a target value of the output current, a programming signal circuit configured to provide electric signals for writing the data in the programmable memory unit as well as a controller circuit with a controller. The controller is operatively connected to the programmable memory unit and is configured to read out the data stored in the programmable memory unit and generate a controller output signal for adjusting the output current of the driver, based on the data stored in the programmable memory unit.

A power converter for an LED lighting device includes a primary side circuit, a secondary side circuit, a detecting circuit, a load-dependent circuit, and a feedback circuit. The feedback circuit generates a feedback signal according to a detected signal which the detecting circuit generates according to a second node of the secondary side circuit. The primary side circuit adjusts a duty cycle according to the feedback signal. The secondary side circuit outputs a first output voltage at a first node of the secondary side circuit and outputs a second output voltage at a third node of the secondary side circuit, according to the duty cycle of the primary side circuit. The load-dependent circuit receives the second output voltage and controls an electrical strength between the first node and the second node of the secondary side circuit according to the first output voltage.

A control circuit includes: a flip-flop having an output configured to be coupled to a control terminal of a transistor and for producing a first signal; a comparator having an output coupled to an input of the flip-flop, and first and second inputs for receiving first and second voltages, respectively; a transconductance amplifier having an input for receiving a sense voltage indicative of a current flowing through the transistor, and an output coupled to the first input of the comparator; a zero crossing detection (ZCD) circuit having an input configured to be coupled to a first current path terminal of the transistor and to an inductor, where the ZCD circuit is configured to detect a demagnetization time of the inductor and produce a third signal based on the detected demagnetization time; and a reference generator configured to generate the second voltage based on the first and third signals.

Pulse sharing control to enhance performance in multiple output power converters is described herein. During a switching cycle, an energy pulse is provided to more than one port (i.e., output) using pulse sharing transfer. Pulse sharing transfer may enhance performance by reducing audible noise due to subharmonics and by reducing a root mean square current of one or more secondary currents. A primary switch is closed to energize an energy transfer element via a primary current. Energy may be shared among a first load port on a first circuit path via a first secondary current and among a second load port on a second circuit path via a second secondary current.

Pulse sharing control to enhance performance in multiple output power converters is described herein. During a switching cycle, an energy pulse is provided to more than one port (i.e., output) using pulse sharing transfer. Pulse sharing transfer may enhance performance by reducing audible noise due to subharmonics and by reducing a root mean square current of one or more secondary currents. A primary switch is closed to energize an energy transfer element via a primary current. Energy may be shared among a first load port on a first circuit path via a first secondary current and among a second load port on a second circuit path via a second secondary current.

Systems and methods are provided to transmit a data encoded power signal to addressable devices. A lighting controller sends the data encoded power waveform to a plurality of addressable lighting modules to power and control a behavior of the lighting modules. An inventory function causes the lighting controller to send, one by one, each of the possible unique addresses, or for a particular range of addresses, a command to turn ON lighting modules. The lighting controller monitors the current draw of the power supply or the data encoded power waveform and compares the monitored current with a threshold to determine whether the addressed lighting module responded to the command. The lighting controller provides the user, via a user interface, a list of the responding lighting modules based on the comparison.

Systems and methods are provided to transmit a data encoded power signal to addressable devices. A lighting controller sends the data encoded power waveform to a plurality of addressable lighting modules to power and control a behavior of the lighting modules. An inventory function causes the lighting controller to send, one by one, each of the possible unique addresses, or for a particular range of addresses, a command to turn ON lighting modules. The lighting controller monitors the current draw of the power supply or the data encoded power waveform and compares the monitored current with a threshold to determine whether the addressed lighting module responded to the command. The lighting controller provides the user, via a user interface, a list of the responding lighting modules based on the comparison.

A dimming signal generation circuit configured for an LED driver can include: a voltage-type dimmer configured to generate a dimming voltage; a dimming control circuit comprising a transformer and a power switch coupled in series between a first voltage and ground; where a secondary side of the transformer is coupled to the voltage-type dimmer is configured to receive the dimming voltage; where a primary side of the transformer is configured to receive the first voltage; and where a dimming reference signal is generated at the primary side of the transformer in accordance with the dimming voltage.

A dimming signal generation circuit configured for an LED driver can include: a voltage-type dimmer configured to generate a dimming voltage; a dimming control circuit comprising a transformer and a power switch coupled in series between a first voltage and ground; where a secondary side of the transformer is coupled to the voltage-type dimmer is configured to receive the dimming voltage; where a primary side of the transformer is configured to receive the first voltage; and where a dimming reference signal is generated at the primary side of the transformer in accordance with the dimming voltage.