Abstract: A driver for driving a load, wherein the driver comprises a dual-boost converter comprising an output capacitance comprising a first output capacitor connected in series with a second output capacitor, a first switch connected to a power input stage via a first inductor and arranged for controlling charging of said first output capacitor via a first diode and a second switch, connected in series with said first switch, and connected to the power input stage via a second inductor and arranged for controlling charging of said second output capacitor via a second diode; wherein a centre tap of said in series connected first and second output capacitor is connected to a centre tap of said in series connected first and second switch.

Abstract: The invention relates to a buck converter comprising an input for receiving an input voltage, an output node for providing an output voltage to a load, a rectifier circuit coupled to the input, a first switch coupled between a first output of the rectifier circuit and a switching node, a second switch coupled between the switching node and a second output of the rectifier circuit, an inductor coupled between the switching node and the output, a first capacitor coupled between the first output of the rectifier and the output, a second capacitor coupled between the output and the second output of the rectifier and a controller. The controller controls the first switch and the second switch and arranged to operate the buck converter in a first mode and a second mode.

Abstract: An electrically switched power converter (10) for converting a direct current (DC) supply voltage (Vin) into at least three balanced DC output load voltages (V1, V2, . . . , Vn). The power converter (10) comprises a switching network (12) having a plurality of series connected electrically controllable switches (S1, S2, . . . , Sn). An output network (11) having a plurality of series connected capacitors (C1, C2, . . . , Cn) for providing said DC output load voltages. A plurality of inductors (L1, L2, . . . , Ln?1), and an electronic controller (14). The electronic controller (14) operates the switches of the switching network (12) for balancing the output load voltages (V1, V2, . . . , Vn) within a range of output load voltages based on a measured representation of the output load voltages and/or output load currents (Io1, Io2, . . . , Ion), by forming respective parallel connections of capacitors (C1, C2, . . . , Cn) and inductors (L1, L2, . . . , Ln?1).

Abstract: The invention relates to a user interface device (1) coupleable to a control unit (2) via a connection cable (3) comprising at least one optical fiber for transporting light. The user interface device (1) comprises a light inlet opening (21) configured to receive light from a region outside a housing (9) of the device (1) and to couple the received light into the first optical fiber (8a) for transmitting the light to the control unit (2) when the user interface device (2) is switched off. Moreover, the invention relates to a control unit (2) coupleable to the user interface device (1) via the connection cable (3). The control unit (2) is configured to detect changes of the light received via the first optical fiber (8a) and to activate power supply to the user interface device (1) to switch on the user interface device (1) based upon the detected changes.

Abstract: A lighting driver is designed for driving an unknown lighting load and is based on a controlled DC driver, with a controlled output current. It is used in a first mode of operation to determine an operating current of the lighting load and in a second mode of operation to deliver a current to the lighting load in dependence the determined operating current, and optionally also in dependence on a dimming setting. In this way, the driver configures its output to the load based on an analysis of the current characteristics of the load, such as the maximum rated current.

Abstract: The present invention relates to a Power over Ethernet system (100) which supports additional optical communication via optical fibres. The powered devices (d1, d2, d3) may comprise circuitry to process optical signals, in particular triggering activation of the powered device (d1, d2, d3) after being in a low power state. The power supplying devices (s1-s6) may relay optical signals via direct optical paths. Optical paths in the network may improve timing accuracy of applications. The overall power consumption of the system may be improved in particular during low activity situations in which the system is primarily used for data communication. The additional optical communication paths may provide redundant paths and thus may increase the network's robustness.

Abstract: The invention relates to a PSE device (2) to be used in a PoE lighting system (1), wherein the PSE device (2) is adapted to receive input power from a power providing system (7). The PSE device (2) comprises a power detection unit for detecting whether the received input power is primary input power or backup input power, wherein the PSE device (2) is adapted to control the power consumption of lighting units (31, 32) depending on the power detection. This allows for an indication of an emergency situation, in which the backup input power is provided, to the PSE device (2) without necessarily requiring data communication means. Moreover, the power consumption of the lighting units (31, 32) can be more efficiently utilized in case of emergency.

Abstract: The invention relates to a user interface device (1) coupleable to a control unit (2) via a connection cable (3) comprising at least one optical fiber for transporting light. The user interface device (1) comprises a light inlet opening (21) configured to receive light from a region outside a housing (9) of the device (1) and to couple the received light into the first optical fiber (8a) for transmitting the light to the control unit (2) when the user interface device (2) is switched off. Moreover, the invention relates to a control unit (2) coupleable to the user interface device (1) via the connection cable (3). The control unit (2) is configured to detect changes of the light received via the first optical fiber (8a) and to activate power supply to the user interface device (1) to switch on the user interface device (1) based upon the detected changes.

Abstract: The invention relates to a management unit (1) and a method for operating such a unit in a Power-over-Ethernet (PoE) installation. The management unit (1) comprises at least one first port (12a) to which an external device (2) can be connected, and it is adapted to control the power delivered at a first port (12a) in dependence on predetermined switching rules.

Abstract: The present invention relates to a Power over Ethernet system (100) which supports additional optical communication via optical fibres. The powered devices (d1, d2, d3) may comprise circuitry to process optical signals, in particular triggering activation of the powered device (d1, d2, d3) after being in a low power state. The power supplying devices (s1-s6) may relay optical signals via direct optical paths. Optical paths in the network may improve timing accuracy of applications. The overall power consumption of the system may be improved in particular during low activity situations in which the system is primarily used for data communication. The additional optical communication paths may provide redundant paths and thus may increase the network's robustness.

Abstract: A lighting driver is designed for driving an unknown lighting load and is based on a controlled DC driver, with a controlled output current. It is used in a first mode of operation to determine an operating current of the lighting load and in a second mode of operation to deliver a current to the lighting load in dependence the determined operating current, and optionally also in dependence on a dimming setting. In this way, the driver configures its output to the load based on an analysis of the current characteristics of the load, such as the maximum rated current.

Abstract: The invention relates to a management unit (1) and a method for operating such a unit in a Power-over-Ethernet (PoE) installation. The management unit (1) comprises at least one first port (12a) to which an external device (2) can be connected, and it is adapted to control the power delivered at a first port (12a) in dependence on predetermined switching rules.

Abstract: The invention relates to a PSE device (2) to be used in a PoE lighting system (1), wherein the PSE device (2) is adapted to receive input power from a power providing system (7). The PSE device (2) comprises a power detection unit for detecting whether the received input power is primary input power or backup input power, wherein the PSE device (2) is adapted to control the power consumption of lighting units (31, 32) depending on the power detection. This allows for an indication of an emergency situation, in which the backup input power is provided, to the PSE device (2) without necessarily requiring data communication means. Moreover, the power consumption of the lighting units (31, 32) can be more efficiently utilized in case of emergency.

Abstract: Described is a management unit (1) and a method for operating such a unit in a Power-over-Ethernet (PoE) installation. The management unit (1) comprises at least one first port (12a) to which an external device (2) can be connected, and it is adapted to control the power delivered at a first port (12a) in dependence on predetermined switching rules.

Abstract: The present invention relates to a load control system in which a power cable of a DC or AC is used for on/off control and dimming of connected load devices without adding significant hardware structure. The control is achieved through a change in the DC or AC bus voltage. A grid controller can perform on/off control and dimming for an entire group of connected load devices by changing the bus voltage. Connected load devices that do understand or want to make use of this feature will be unaffected. In order to reduce the effects of voltage drop, a calibration procedure is provided. The calibration procedure first triggers the connected load devices into a calibration mode and then initiates a number of predefined output level commands that allow the load devices to build an individual correction for the undesired voltage drop.

Abstract: The present invention relates to a rectifying method and circuit using a magnetically coupled double flyback converter. The main circuit can consist of only one transformer, two switches, two low frequency diodes, two high frequency diodes and two capacitors, so that power is inherently distributed according to the demand on the two DC phases and a sinusoidal grid current can be obtained without sophisticated control.

Abstract: The present invention relates to a load control system in which a power cable of a DC or AC is used for on/off control and dimming of connected load devices without adding significant hardware structure. The control is achieved through a change in the DC or AC bus voltage. A grid controller can perform on/off control and dimming for an entire group of connected load devices by changing the bus voltage. Connected load devices that do understand or want to make use of this feature will be unaffected. In order to reduce the effects of voltage drop, a calibration procedure is provided. The calibration procedure first triggers the connected load devices into a calibration mode and then initiates a number of predefined output level commands that allow the load devices to build an individual correction for the undesired voltage drop.

Abstract: The present invention relates to a rectifying method and circuit using a magnetically coupled double flyback converter. The main circuit can consist of only one transformer, two switches, two low frequency diodes, two high frequency diodes and two capacitors, so that power is inherently distributed according to the demand on the two DC phases and a sinusoidal grid current can be obtained without sophisticated control.

Abstract: The present invention relates to a power converter architecture and its operation principle that supplies an electric load with a controlled direct voltage from both a local direct current electricity source as well as an alternating current (AC) mains with maximum power conversion efficiency. For the case that the local electricity source can not provide enough electricity to the local load it is additionally supplied with electricity from the AC mains. In other case electricity is also feed into the AC grid when a local source can provide more electricity than needed to supply local loads.

Abstract: The present invention relates to a power converter architecture and its operation principle that supplies an electric load with a controlled direct voltage from both a local direct current electricity source as well as an alternating current (AC) mains with maximum power conversion efficiency. For the case that the local electricity source can not provide enough electricity to the local load it is additionally supplied with electricity from the AC mains. In other case electricity is also feed into the AC grid when a local source can provide more electricity than needed to supply local loads.