Abstract: A current measuring device for switched-mode electronic power converters includes two independent sensors connected in series for the current to be measured, one of said sensors providing an admittance and the other providing a conductance. The current measuring device further includes a parallel current measuring resistor and an average value capacitor which are connected in parallel contribute to the provided admittance. The conductance is provided by a serial current measuring resistor as one of the sensors. The current to be measured has both DC and AC current components. The current measuring device further includes a filter is transferred back into the power path or merged with the current measuring sensors.

Abstract: A method for operating clocked and regulated electronic power converters may be contained in operating devices for light-emitting diodes. An associated regulating circuit may include at least one regulating amplifier having at least two regulating inputs, from the output of which a negative feedback network runs to one of its regulating inputs, a first input for the signal for a target value of the average of the output power to be regulated, and a second input which forwards a signal for the target value of a waveform or of a pulse pattern for the output power to be regulated to one of the regulating inputs via a DC current-blocking high-pass filter.

Abstract: A method for operating clocked and regulated electronic power converters may be contained in operating devices for light-emitting diodes. An associated regulating circuit may include at least one regulating amplifier having at least two regulating inputs, from the output of which a negative feedback network runs to one of its regulating inputs, a first input for the signal for a target value of the average of the output power to be regulated, and a second input which forwards a signal for the target value of a waveform or of a pulse pattern for the output power to be regulated to one of the regulating inputs via a DC current-blocking high-pass filter.

Abstract: A current measuring device for switched-mode electronic power converters includes two independent sensors connected in series for the current to be measured, one of said sensors providing an admittance and the other providing a conductance. The current measuring device further includes a parallel current measuring resistor and an average value capacitor which are connected in parallel contribute to the provided admittance. The conductance is provided by a serial current measuring resistor as one of the sensors. The current to be measured has both DC and AC current components. The current measuring device further includes a filter is transferred back into the power path or merged with the current measuring sensors.

Abstract: An assembly and a method is provided where the LED module includes a plurality of module units interconnected between common connection lines in a sequential order with increasing distances towards a connection terminal of the LED module. The circuit assembly includes an output terminal having a first output terminal portion and a second output terminal portion, a main power supply for supplying an operation voltage potential to a first output terminal portion, a control device for generating a pulse width modulation signal, and an electronic switch coupled to the control device and configured to obtain the pulse width modulation signal and arranged to connect and disconnect a second output terminal portion to/from a reference potential in accordance with the pulse width modulation signal, such as to supply a pulse width modulated voltage to the output terminal. A pulse shaping unit is coupled to the control device.

Abstract: A circuit arrangement for operating a load includes a primary-side switched-mode converter with galvanic isolation of input and output voltage, having: a primary circuit, a secondary circuit and a power transformer, wherein: a first inductor and a second inductor, the first inductor being arranged in the secondary circuit in order to pass the current generated by the transformer when the energy is transferred to the secondary circuit, and the second inductor being interconnected in a measuring circuit. The second inductor is spatially arranged in a stray magnetic field generated by the first inductor; the measuring circuit has an output at which a measuring voltage is output, and the control device is connected to the output of the measuring circuit in order to determine a corresponding current flow from the output measuring voltage, and is configured to control the clocked operation of the switch depending on the current flow determined.

Abstract: A circuit arrangement for operating a load includes a primary-side switched-mode converter with galvanic isolation of input and output voltage, having: a primary circuit, a secondary circuit and a power transformer, wherein: a first inductor and a second inductor, the first inductor being arranged in the secondary circuit in order to pass the current generated by the transformer when the energy is transferred to the secondary circuit, and the second inductor being interconnected in a measuring circuit. The second inductor is spatially arranged in a stray magnetic field generated by the first inductor; the measuring circuit has an output at which a measuring voltage is output, and the control device is connected to the output of the measuring circuit in order to determine a corresponding current flow from the output measuring voltage, and is configured to control the clocked operation of the switch depending on the current flow determined.

Abstract: An assembly and a method is provided where the LED module includes a plurality of module units interconnected between common connection lines in a sequential order with increasing distances towards a connection terminal of the LED module. The circuit assembly includes an output terminal having a first output terminal portion and a second output terminal portion, a main power supply for supplying an operation voltage potential to a first output terminal portion, a control device for generating a pulse width modulation signal, and an electronic switch coupled to the control device and configured to obtain the pulse width modulation signal and arranged to connect and disconnect a second output terminal portion to/from a reference potential in accordance with the pulse width modulation signal, such as to supply a pulse width modulated voltage to the output terminal. A pulse shaping unit is coupled to the control device.

Abstract: An overvoltage protection apparatus may include a first connection for coupling to an N line, and at least one voltage-limiting element which is designed to block the current through the voltage-limiting element up to a predefinable threshold value of the voltage dropped across the voltage-limiting element and to conduct the current above this threshold value. The overvoltage protection apparatus may further include a second connection for coupling to a metal housing of an electrical apparatus, at least one capacitor, and at least one first non-reactive resistor. The at least one capacitor, the at least one first non-reactive resistor and the at least one voltage-limiting element are connected in series between the first connection and the second connection.

Abstract: A circuit arrangement includes a converter having a converter switch and a driver for the converter switch. The driver includes an interface coupling to a dimming apparatus supplying a dimming value. The driver provides an RF signal with a duty ratio at the output of the driver. The driver modifies the RF signal by superposition of a PWM signal such that, in correlation with the supplied dimming value, a predefinable number of periods of the RF signal is chopped from the RF signal. The driver is configured to reduce the duty ratio of the RF signal during at least one predefinable period of the RF signal in order to adjust levels of dimming which correspond to dimming values which are between a first and a second dimming value which differ from one another by at least one period of the RF signal.

Abstract: An overvoltage protection apparatus may include a first connection for coupling to an N line, and at least one voltage-limiting element which is designed to block the current through the voltage-limiting element up to a predefinable threshold value of the voltage dropped across the voltage-limiting element and to conduct the current above this threshold value. The overvoltage protection apparatus may further include a second connection for coupling to a metal housing of an electrical apparatus, at least one capacitor, and at least one first non-reactive resistor. The at least one capacitor, the at least one first non-reactive resistor and the at least one voltage-limiting element are connected in series between the first connection and the second connection.

Abstract: A circuit arrangement includes a converter having a converter switch and a driver for the converter switch. The driver includes an interface coupling to a dimming apparatus supplying a dimming value. The driver provides an RF signal with a duty ratio at the output of the driver. The driver modifies the RF signal by superposition of a PWM signal such that, in correlation with the supplied dimming value, a predefinable number of periods of the RF signal is chopped from the RF signal. The driver is configured to reduce the duty ratio of the RF signal during at least one predefinable period of the RF signal in order to adjust levels of dimming which correspond to dimming values which are between a first and a second dimming value which differ from one another by at least one period of the RF signal.

Abstract: In various embodiments, a method for operating a high-pressure discharge lamp below its nominal power is provided, wherein the high-pressure discharge lamp is operated at nominal power with an alternating current having a predetermined operating frequency, and the lamp voltage is measured during a half-cycle at least at the start of a half-cycle and at the end of a half-cycle. The method may include: reducing the present operating frequency below an upper limit; and changing the current shape of the alternating current to a monopitch roof-shaped current shape, which is dependent on the difference in the lamp voltages at the end and at the start of the half-cycle.

Abstract: A circuit arrangement may include: a half-bridge arrangement with a half-bridge center point, connected to an intermediate circuit voltage with a reference potential and a feed voltage potential; a lamp inductor connected at one end to the half-bridge center point; a starting stage connected to the other end of the lamp inductor and to the intermediate circuit voltage; a first switch connected between the reference potential and the starting stage; a series circuit of a first and a second capacitor connected to the intermediate circuit voltage; terminals for connecting a high-pressure discharge lamp, a first terminal being connected to the starting stage and a second terminal being connected to a node between the first and second capacitors; a two-port network, a first port of said two-port network connected to the starting stage and a second port of said two-port network connected to the node between the first and second capacitors.

Abstract: A method for programming an electronic operating device is provided. The method may include programming the operating device via a slow on/off switching pattern of its supply voltage, the operating device being configured to automatically dim the connected light or lights on a time-control basis after programming, and choosing the time base of the on/off switching pattern used for programming such that a person can carry out the programming using a clock and an on/off switch for the supply voltage.

Abstract: An electronic control gear for a HID lamp receives an input signal for operating the lamp and frequency modulates the input signal to generate a frequency modulated output signal that drives an arc of the lamp. The frequency modulation of the output signal sweeps continuously between a low frequency modulation and a high frequency modulation, the low frequency modulation being a frequency f1 in a range of 125 kHz to 150 kHz and the high frequency modulation being a frequency f2 in a range of 230 kHz to 300 kHz, where f2?f1 is at least 0.4*f1. A power amplifier changes an amplitude of the frequency modulated output signal during the low frequency modulations so that a current amplitude of the frequency modulated output signal is substantially constant, and a variable gain transformer adjusts a voltage of the frequency modulated output signal during starting of the lamp.

Abstract: A circuit arrangement for starting and for operating a gas discharge lamp with an AC step-down converter or a half-bridge arrangement, which functions as a step-down inverter during quasi-resonant operation, a lamp inductor and a resonant capacitor, which form a resonant circuit, and a smoothing inductor, wherein the resonant capacitor is dimensioned in terms of its value such that, during normal operation of the lamp, a voltage ripple of over 100 V from maximum to maximum is present across said resonant capacitor, the smoothing inductor being dimensioned in such a way that it can filter the majority of the voltage ripple, and the switching frequency at the same time being between 200 kHz and 500 kHz.

Abstract: The invention relates to an electronic operating device for a gas discharge lamp having: a DC/DC voltage converter, a power factor correction circuit, an inverter, a lamp inductor, and having a full bridge with two half bridges which can be controlled separately, wherein the DC/DC voltage converter additionally acts as a voltage step-down converter, and the inverter additionally has the following functions: lamp current regulation, the function of stepping down the voltage to the lamp voltage, and resonant ignition.

Abstract: A method for programming an electronic operating device is provided. The method may include programming the operating device via a slow on/off switching pattern of its supply voltage, the operating device being configured to automatically dim the connected light or lights on a time-control basis after programming, and choosing the time base of the on/off switching pattern used for programming such that a person can carry out the programming using a clock and an on/off switch for the supply voltage.

Abstract: An electronic control gear for a HID lamp receives an input signal for operating the lamp and frequency modulates the input signal to generate a frequency modulated output signal that drives an arc of the lamp. The frequency modulation of the output signal sweeps continuously between a low frequency modulation and a high frequency modulation, the low frequency modulation being a frequency f1 in a range of 125 kHz to 150 kHz and the high frequency modulation being a frequency f2 in a range of 230 kHz to 300 kHz, where f2?f1 is at least 0.4*f1. A power amplifier changes an amplitude of the frequency modulated output signal during the low frequency modulations so that a current amplitude of the frequency modulated output signal is substantially constant, and a variable gain transformer adjusts a voltage of the frequency modulated output signal during starting of the lamp.