Abstract: In various embodiments, a switched-mode power supply is provided. The switched-mode power supply includes at least two output stages. Each output stage has a converter. A frequency of at least one of the output stages is modulated by way of a modulation unit configured to provide a modulation signal that is combined with a switching signal for driving a switching element of the converter of the at least one output stage.

Abstract: In various embodiments, a switched-mode power supply is provided. The switched-mode power supply includes at least two output stages. Each output stage has a converter. A frequency of at least one of the output stages is modulated by way of a modulation unit configured to provide a modulation signal that is combined with a switching signal for driving a switching element of the converter of the at least one output stage.

Abstract: A circuit arrangement for operating light sources includes input terminals for a power supply system voltage, a first rectifying circuit, a boost converter having output terminals, a half-bridge arrangement having two switches, which is connected to the output terminals of the boost converter, an inductance, the first terminal of which is coupled to the centre point of the half-bridge, and a second rectifying circuit, the first input terminal of which is coupled to the second terminal of the inductance and the second input of which is coupled to one of the output terminals of the boost converter. The output terminals of the second rectifying circuit are coupled to the inputs of a current-compensated inductor. At least one light source is connected to the output terminals of the current-compensated inductor, and the output terminals of the current-compensated inductor are coupled to an output terminal of the boost converter via filter capacitors.

Abstract: Various embodiments provide a wirelessly programmable electronic control gear, which may include an essentially enclosed metal or metallized housing. The housing is a punched and curved sheet-metal housing. The wirelessly programmable electronic control gear may further include a circuit board with an antenna component fitted thereon to receive wireless programming signals, and an area in the metal or metallized housing which has at least one longitudinal recess. The at least one recess is located close to the antenna. The orientation of the longitudinal recess is designed as essentially parallel to magnetic field lines of the antenna.

Abstract: A circuit arrangement for operating light sources includes input terminals for a power supply system voltage, a first rectifying circuit, a boost converter having output terminals, a half-bridge arrangement having two switches, which is connected to the output terminals of the boost converter, an inductance, the first terminal of which is coupled to the centre point of the half-bridge, and a second rectifying circuit, the first input terminal of which is coupled to the second terminal of the inductance and the second input of which is coupled to one of the output terminals of the boost converter. The output terminals of the second rectifying circuit are coupled to the inputs of a current-compensated inductor. At least one light source is connected to the output terminals of the current-compensated inductor, and the output terminals of the current-compensated inductor are coupled to an output terminal of the boost converter via filter capacitors.

Abstract: A method for actuating a discharge lamp (LP), wherein in order to ignite the lamp a resonant circuit (L, C1) is brought into resonance or near resonance by the action of alternating current and as a result adjustment to give a predetermined amperage is performed by varying the frequency of the alternating current. For this purpose a measuring device transmits measured values of the amperage to means for controlling the frequency, and these means establish the frequency in dependence on the measured values. Before the ignition voltage is applied the electrodes of the lamp are pre-heated by the action on the resonant circuit of alternating current of a different frequency than when the lamp is ignited.

Abstract: Phase angle detection techniques for phase-cut dimming lighting circuitry are disclosed. A phase-cut lighting driver circuit may include galvanic isolation circuitry having a primary and secondary side. The phase angle information of a phase-cut signal may be detected on the secondary side of the driver circuitry, and a microcontroller can create a dimming signal that adjusts the driver output power according to the phase angle information. In some embodiments, the phase angle detection techniques may be utilized to control the output of lighting driver circuitry, such as a phase-cut dimming LED driver.

Abstract: Operating at least one LED on a circuit assembly having an input with first (E1) and second input terminals for coupling to an alternating supply voltage modified by a phase dimmer (12) for setting a dimming angle. Rectifier (14) has an input and an output, with its input being coupled to the circuit assembly's input. Signal (UC1) at the rectifier output is compared with a comparison value. PWM signal (S0) has a first frequency and the dimming angle is correlated with its pulse width. PWM signal having the first frequency (f1) is converted into a PWM signal (S3) that has a second frequency, and the dimming angle is correlated with its pulse width. Controllable current source (22), which is coupled on the input side to the rectifier output, is controlled with PWM signal (S3), with the at least one LED being coupled to the output of the controllable current source.

Abstract: An electronic ballast arrangement for a discharge lamp is provided. The electronic ballast arrangement includes an electronic ballast for a discharge lamp with a control application specific integrated circuit, the control application specific integrated circuit having a control input, which is characterized by the fact that the potential present across it sets the operating frequency of the control ASIC when driving the discharge lamp; and a switch; wherein the electronic ballast is connected to the switch, with different switching positions of the switch determining different potentials which are present at the control input, in order to thus set the operating frequency of the control application specific integrated circuit via the switch.

Abstract: A control apparatus for at least one circuit arrangement for operating fluorescent lamps and LEDs. Switching can occur between operation of the fluorescent lamps and LEDs via a control input.

Abstract: The invention relates to a circuit arrangement for operating at least one discharge lamp (FL1) and at least one LED (D5, D6, Dn), wherein the connection of the LEDs has so-called SELV insulation.

Abstract: In various embodiments, a circuit for driving a fluorescent lamp is provided. The circuit may include a half bridge including a first switch and a second switch; a drive unit for driving the first switch and the second switch, it being possible for a predetermined state to be established using the drive unit, and it being possible for the driving of the first and the second switch to be modulated as a result of the predetermined state using the drive unit.

Abstract: A method for actuating a discharge lamp (LP), wherein in order to ignite the lamp a resonant circuit (L, C1) is brought into resonance or near resonance by the action of alternating current and as a result adjustment to give a predetermined amperage is performed by varying the frequency of the alternating current. For this purpose a measuring device transmits measured values of the amperage to means for controlling the frequency, and these means establish the frequency in dependence on the measured values. Before the ignition voltage is applied the electrodes of the lamp are pre-heated by the action on the resonant circuit of alternating current of a different frequency than when the lamp is ignited.

Abstract: The present invention relates to an electronic ballast for discharge lamps (LA) which have preheatable electrodes (E1, E2). The electronic ballast has a measuring apparatus (M), which is designed to measure, during the preheating process, a variable, which is correlated with the electrode temperature increased by the preheating, of at least one of the electrodes (E1, E2) of a connected discharge lamp (LA), and a control apparatus (C), which is designed to match the electrode temperature, during the preheating process, in response to the measurement by adjusting an operational parameter of the electronic ballast. Furthermore, the electronic ballast is designed to detect cross discharges or a sufficient operating temperature of one of the electrodes (E1, E2) and possibly to ignite the discharge.

Abstract: An electronic ballast arrangement for a discharge lamp is provided. the electronic ballast arrangement may include an electronic ballast for a discharge lamp with a control application specific integrated circuit, the control application specific integrated circuit having a control input, which is characterized by the fact that the potential present across it sets the operating frequency of the control ASIC when driving the discharge lamp; and a switch; wherein the electronic ballast is connected to the switch, with different switching positions of the switch determining different potentials which are present at the control input, in order to thus set the operating frequency of the control application specific integrated circuit via the switch.

Abstract: The present invention relates to a circuit arrangement for operating at least one electric lamp and at least one LED including: an inverter having a bridge circuit having at least one first bridge transistor and one second bridge transistor arranged in series with one another, a center point of the bridge circuit being defined between the first and second bridge transistors; a lamp supply unit for supplying the electric lamp with energy from the bridge circuit, which includes a supply line with an inductance, via which the center point (M) of the bridge circuit is coupled to a first connection for the electric lamp; the lamp supply unit including an LED supply unit, which is designed to supply the at least one LED with energy. Moreover, it relates to an operating method for at least one electric lamp and at least one LED using such a circuit arrangement.

Abstract: The present invention relates to an electronic ballast for discharge lamps (LA) which have preheatable electrodes (E1, E2). The electronic ballast has a measuring apparatus (M), which is designed to measure, during the preheating process, a variable, which is correlated with the electrode temperature increased by the preheating, of at least one of the electrodes (E1, E2) of a connected discharge lamp (LA), and a control apparatus (C), which is designed to match the electrode temperature, during the preheating process, in response to the measurement by adjusting an operational parameter of the electronic ballast. Furthermore, the electronic ballast is designed to detect cross discharges or a sufficient operating temperature of one of the electrodes (E1, E2) and possibly to ignite the discharge.

Abstract: In various embodiments, a circuit for driving a fluorescent lamp is provided. The circuit may include a half bridge including a first switch and a second switch; a drive unit for driving the first switch and the second switch, it being possible for a predetermined state to be established using the drive unit, and it being possible for the driving of the first and the second switch to be modulated as a result of the predetermined state using the drive unit.

Abstract: The present invention relates to a circuit arrangement for operating at least one electric lamp (LP) having a drive circuit (16), which has at least one terminal for a system voltage (UN) on the input side and at least one terminal for the at least one electric lamp (LP) on the output side; the drive circuit (16) having a control unit (18) and a step-up converter having a step-up converter inductor (L2) and a switch (S1), and the control unit (18) being designed to operate the step-up converter in a discontinuous mode, in which the current (IN) through the step-up converter inductor (L2) has gaps, the duration (?t) of these gaps being varied. It also relates to an operating method for at least one electric lamp (LP) using such a circuit arrangement.

Abstract: The present invention relates to an electronic ballast for discharge lamps, for example low-pressure discharge lamps, having a converter having a switching element and a two-part lamp inductor which is connected upstream and downstream of the discharge lamp. An electronic ballast according to the invention has a smoothing circuit which reduces voltage jumps caused by switching operations in the converter at the lamp terminals.