Abstract: Various embodiments may relate to a power supply unit, including an output for outputting an operating current depending on an internal measurement signal, a communications line, and a current-measuring device, which is connected to the communications line. The current-measuring device is designed to generate a current on the communications line which is proportional to the conductance of a current-setting resistance. The current-measuring device has a current mirror, which is designed to mirror the generated current on the communications line. The current-measuring device is designed to convert the mirrored current into an internal measurement signal with a reference potential which is different than the communications line. At least one light source module is connectable to the output, wherein the at least one light source module has the current-setting resistance, which is connectable to the communications line.

Abstract: Various embodiments may relate to a power supply unit, including an output for outputting an operating current depending on an internal measurement signal, a communications line, and a current-measuring device, which is connected to the communications line. The current-measuring device is designed to generate a current on the communications line which is proportional to the conductance of a current-setting resistance. The current-measuring device has a current mirror, which is designed to mirror the generated current on the communications line. The current-measuring device is designed to convert the mirrored current into an internal measurement signal with a reference potential which is different than the communications line. At least one light source module is connectable to the output, wherein the at least one light source module has the current-setting resistance, which is connectable to the communications line.

Abstract: A method for operating a lamp may include: Connecting a device to a pair of input connections of an electronic ballast and by this means determining a respective dimming duration for at least one predetermined situation; and Activating the lamp by the electronic ballast in at least one predetermined situation such that the lamp emits light with a reduced intensity compared with the normal intensity at which the lamp otherwise emits light over a period of a dimming duration determined for this situation.

Abstract: A method for operating a high pressure discharge lamp, with the high pressure discharge lamp being operated by a current inverter with a square wave lamp current having a positive phase with positive current flow and a negative phase with negative current flow, and with the current inverter being controlled by a control arrangement wherein the method comprises the steps of measuring a value for the positive current flow representing the lamp wattage or the square wave lamp current, measuring a value for the negative current flow representing the lamp wattage or the square wave lamp current; calculating a predetermined setpoint value in each case from a guide variable of a lamp wattage or of the square wave lamp current and the measured value for the phase with positive current flow; calculating a predetermined setpoint value in each case from a guide variable of a lamp wattage or of the square wave lamp current and the measured value for the phase with negative current flow; and outputting the two predetermin

Abstract: A circuit arrangement for operating discharge lamps is provided with an input, to which an AC system voltage from a power supply system can be connected, an output, to which at least one discharge lamp can be connected, a backup capacitance, which is arranged between the input and the output, and a switch, which is in a charging current path of the backup capacitance. The circuit arrangement may include a driver configured to clock the switch for a predetermined period of time when the circuit arrangement is switched on for periodically interrupting the charging current path of the backup capacitance.

Abstract: In various embodiments, a circuit arrangement may include a voltage-measuring device embodied to measure an output voltage, wherein the voltage-measuring device is embodied to provide at its output a signal which is correlated with the measured output voltage, wherein the voltage-measuring device is coupled to a control device for the purpose of transmitting said signal to the control device, and wherein the control device is embodied to vary an off-time as a function of the measured output voltage.

Abstract: A method for making a lamp wattage available for operating at least one gas discharge lamp depending on a dimming signal which is input into a wattage factor correction circuit, having a switch element that is switched on clocked by a switch-on time, wherein the wattage factor correction circuit emits an intermediate circuit voltage which in turn is input into a converter that makes the lamp wattage available, comprising the steps of: in an operating phase in which the dimming signal has no phase leading edge and no phase trailing edge, the wattage factor correction circuit and the converter are regulated independently of each other using a separate regulating circuit in each case; and in an operating phase in which the dimming signal has a phase leading edge or a phase trailing edge, the two independent regulating circuits are coupled to each other via a higher-order third regulating circuit such that the lamp wattage of the converter is adjusted such that the switch-on time of the switch element in the watt

Abstract: A circuit assembly for operating a discharge lamp (5) comprising a full-bridge assembly (1), which supplies the discharge lamp (5), wherein the circuit assembly can operate the discharge lamp (5) at a low-frequency and at a high-frequency voltage, and the circuit assembly is configured: to operate the discharge lamp (5) directly after starting the lamp at a high-frequency voltage, and to operate the discharge lamp (5) above a predetermined lamp voltage (UT) at a low-frequency voltage, wherein the full-bridge assembly (1) always operates in discontinuous conduction mode.

Abstract: An electronic operating device for a gas discharge lamp having a voltage transformer which converts an input voltage into an intermediate circuit voltage, and an inverter with a lamp inductor and a bridge circuit with at least two switches which converts the intermediate circuit voltage into a lamp voltage, the operating device being designed to adjust the intermediate circuit voltage present between the DC voltage transformer and the inverter to a predetermined value which is dependent on the lamp state. Also disclosed is a method for operating an operating device.

Abstract: A circuit arrangement for operating a high pressure discharge lamp includes a bridge circuit with at least two switches, a control device controlling the switches. The bridge circuit is a half-bridge circuit having exactly two switches. The control device switches on and off in an alternating manner, the first switch and the second switch of the bridge circuit having a first frequency. When the first switch is switched off for controlling the other switch with a rectangular signal of a second frequency which is greater than the first frequency and a predeterminable connection duration. The circuit also includes a tension measuring device measuring an actual value of tension over the high pressure discharge lamp. A reference device provides at least one upper threshold value for the voltage via the high pressure discharge lamp. A comparison device compares the actual voltage over the high pressure discharge lamp with the threshold value.

Abstract: A method for operating a lamp may include: Connecting a device to a pair of input connections of an electronic ballast and by this means determining a respective dimming duration for at least one predetermined situation; and Activating the lamp by the electronic ballast in at least one predetermined situation such that the lamp emits light with a reduced intensity compared with the normal intensity at which the lamp otherwise emits light over a period of a dimming duration determined for this situation.

Abstract: A method for making a lamp wattage available for operating at least one gas discharge lamp depending on a dimming signal which is input into a wattage factor correction circuit, having a switch element that is switched on clocked by a switch-on time, wherein the wattage factor correction circuit emits an intermediate circuit voltage which in turn is input into a converter that makes the lamp wattage available, comprising the steps of: in an operating phase in which the dimming signal has no phase leading edge and no phase trailing edge, the wattage factor correction circuit and the converter are regulated independently of each other using a separate regulating circuit in each case; and in an operating phase in which the dimming signal has a phase leading edge or a phase trailing edge, the two independent regulating circuits are coupled to each other via a higher-order third regulating circuit such that the lamp wattage of the converter is adjusted such that the switch-on time of the switch element in the watt

Abstract: A method for operating a high pressure discharge lamp, with the high pressure discharge lamp being operated by a current inverter with a square wave lamp current having a positive phase with positive current flow and a negative phase with negative current flow, and with the current inverter being controlled by a control arrangement wherein the method comprises the steps of measuring a value for the positive current flow representing the lamp wattage or the square wave lamp current, measuring a value for the negative current flow representing the lamp wattage or the square wave lamp current; calculating a predetermined setpoint value in each case from a guide variable of a lamp wattage or of the square wave lamp current and the measured value for the phase with positive current flow; calculating a predetermined setpoint value in each case from a guide variable of a lamp wattage or of the square wave lamp current and the measured value for the phase with negative current flow; and outputting the two predetermin

Abstract: In various embodiments, a circuit arrangement may include a voltage-measuring device embodied to measure an output voltage, wherein the voltage-measuring device is embodied to provide at its output a signal which is correlated with the measured output voltage, wherein the voltage-measuring device is coupled to a control device for the purpose of transmitting said signal to the control device, and wherein the control device is embodied to vary an off-time as a function of the measured output voltage.

Abstract: A circuit arrangement for operating discharge lamps is provided with an input, to which an AC system voltage from a power supply system can be connected, an output, to which at least one discharge lamp can be connected, a backup capacitance, which is arranged between the input and the output, and a switch, which is in a charging current path of the backup capacitance. The circuit arrangement may include a driver configured to clock the switch for a predetermined period of time when the circuit arrangement is switched on for periodically interrupting the charging current path of the backup capacitance.

Abstract: A circuit arrangement for operating a high pressure discharge lamp includes a bridge circuit with at least two switches, a control device controlling the switches. The bridge circuit is a half-bridge circuit having exactly two switches. The control device switches on and off in an alternating manner, the first switch and the second switch of the bridge circuit having a first frequency. When the first switch is switched off for controlling the other switch with a rectangular signal of a second frequency which is greater than the first frequency and a predeterminable connection duration. The circuit also includes a tension measuring device measuring an actual value of tension over the high pressure discharge lamp. A reference device provides at least one upper threshold value for the voltage via the high pressure discharge lamp. A comparison device compares the actual voltage over the high pressure discharge lamp with the threshold value.

Abstract: The invention relates to an electronic ballast and to an operating method for high-pressure discharge lamps. During a current measurement, in particular for current regulation, only switching phases of a specific polarity of the current are taken into consideration.

Abstract: The invention relates to an electronic ballast, to an illumination device including the electronic ballast and an associated high-pressure discharge lamp, and to a corresponding operating method for a high-pressure discharge lamp, in which resonance excitation is used to generate a voltage-increased power for a transfer phase of the lamp Lp after starting.

Abstract: A step-up converter has a power factor correction, has an input for connection to a supply voltage, in particular a rectified AC voltage; an inductor, a diode and a storage capacitor, which are coupled in a series arrangement between the input and the output, in which the voltage that is dropped across the storage capacitor is provided at the output; a switch, which is coupled between a junction point between the inductor and the diode, on the one hand, and a reference potential, on the other hand; and a drive circuit for the switch which controls the times for which the switch remains closed and open; the drive circuit being designed to control the time for which the switch remains closed as a function of the freewheeling time of the inductor. A method for operating such a step-up converter is also disclosed.

Abstract: The invention relates to an electronic ballast and to an operating method for high-pressure discharge lamps. During a current measurement, in particular for current regulation, only switching phases of a specific polarity of the current are taken into consideration.