Abstract: The invention relates to a resonant converter (1) which has multiple outputs (7a, 7b) and contains a transformer (4) with a primary winding (5) and at least two secondary windings (6a, 6b) having different winding directions. In this way it is possible to design as cost-effectively as possible a resonant converter with multiple outputs, two of which can be controlled separately from each other.

Abstract: The invention relates to a transformer (10, 10′) with a core (11) which has a center piece (11a) with a first and a second flange (11b, 11c), in which a first and a second winding (12, 13) of the transformer (10, 10′) are wound on the center piece (11a).

Abstract: An electrical circuit arrangement provides a low power rectified low voltage from an AC line voltage. The circuit consists of two circuit blocks combined together via an intermediate circuit, of which the first circuit block contains a capacitive input stage for producing a voltage-limited intermediate voltage that is substantially less than the line voltage, and a second circuit block that contains an asymmetric half-bridge that receives the intermediate voltage and produces an AC voltage that is decoupled from the line voltage via a transformer that is operated at the substantially lower voltage. The output of the transformer is rectified to provide the low-level DC output.

Abstract: The invention relates to a resonant converter (1) which has multiple outputs (7a, 7b) and contains a transformer (4) with a primary winding (5) and at least two secondary windings (6a, 6b) having different winding directions. In this way it is possible to design as cost-effectively as possible a resonant converter with multiple outputs, two of which can be controlled separately from each other.

Abstract: A buck converter, boost converter or flyback converter is generally represented as a two-port having a primary side with a primary switching device (10; 38; 70; 98; 110), and a secondary side with a secondary switching device (20; 50; 80; 106). The primary switching device is controlled in such a way that the on-time is adapted to the voltage at the primary side of the converter. The relation between the on-time of the primary switching device and the primary voltage is a generally hyperbolic function.

Abstract: A DC—DC converter includes an inverter and a primary-side circuit with a transformer whose secondary-side voltage is rectified by at least one rectifier for generating an output DC voltage. To avoid an asymmetrical load, which is in particular exhibited by a different load of the rectifier elements (power semiconductors), an electrical magnitude of the DC—DC converter is measured. This magnitude may be, for example, a primary-side current, a primary-side voltage at a capacitance, or a secondary-side, rectified voltage. A parameter for the symmetry deviation is calcuted from the measurement of the magnitude. A symmetry regulation arrangement utilizes the drive of the inverter, for example, the duty cycle of the pulse-width modulated voltage produced by the inverter to minimize the parameter for the symmetry deviation. This achieves an even distribution of the power over the secondary rectifier elements.

Abstract: In a voltage converter including a half bridge in the form of controlled semiconductor switches, a transformer and a rectifier circuit, in which a primary winding of the transformer connected in series with at least one capacitor is connected to the half bridge, the at least one capacitor is arranged such that the resonant frequency of the series combination of the at least one capacitor and an inductance which inductance is active when the rectifier circuit is in operation, is larger than half the pulse frequency with which the semiconductor switches are controlled. Similar measures can also be carried out with a voltage converter with a direct coupling, in which a longitudinal coil and a transverse coil then substitute for the transformer.

Abstract: The invention relates to arrangements for the power supply of integrated circuits. Various solutions are proposed with a view to guaranteeing a power supply satisfying all the technical requirements with regard to ever greater permissible load jumps, greater permissible current change rates and ever tighter tolerances regarding the constancy of the supply voltage in question.

Abstract: A circuit for converting AC voltage into DC voltage for one or two devices (Rm, Ra), includes a first part of the current being fed to the input side via a large induction coil (L50) and a first rectifier (Gm), and a second part of the current being fed via a second rectifier (Ga) upstream of the large induction coil. On the output side, behind the second rectifier (Ga), a switched-mode power supply is arranged, preferably in the form of an up-converter or a flyback converter (10). The division of the applied current for smoothing the output voltage provides that the induction coil (L50) can be accordingly dimensioned smaller and, despite this, the circuit can also satisfy relevant standard specifications.

Abstract: A circuit for converting an AC voltage into a DC voltage for a device (RL), in which the AC voltage supplied is passed through a large induction coil (L50) and a rectifier (G), includes, on the output side the rectifier (G), two capacitors (C1, C2) connected in parallel, which are separated by a diode (D). In addition, the capacitor C1 positioned closer to the rectifier (G) is discharged, at least in part, via an active converter (20) in the second half of each power supply wave. As a result of which, the current consumption is widened and the system harmonics are reduced. Furthermore, the induction coil (L50) can be dimensioned correspondingly smaller, but can nevertheless meet the relevant standards.

Abstract: A resonant converter, a regulation method for a resonant converter and a switched-mode power supply with a resonant converter are proposed. A converter comprises an inverter for generating an AC voltage which is fed to a resonant arrangement with a capacitor and a transformer. The circuit provides two types of secondary units, each comprising a secondary winding of the transformer and at least one rectifier element. Secondary units of the first and second type are then distinguished by opposite orientation, for example, opposite direction of winding or oppositely oriented wiring. At least two output voltages are delivered on the output, a first output voltage of which being supplied as a direct output of a first-type secondary unit and a second output voltage as a “stack output” of a first-type secondary unit and a second-type secondary unit, preferably as a series combination of these secondary units.

Abstract: A DC-DC converter, a regulation method for a DC-DC converter and a switched-mode power supply are proposed. The DC-DC converter comprises an inverter and a primary-side circuit with a transformer whose secondary-side voltage is rectified by at least one rectifier for generating an output DC voltage. To avoid an asymmetrical load, which is in particular exhibited by a different load of the rectifier elements (power semiconductors), an electrical magnitude of the DC-DC converter is measured. This magnitude may be, for example, a primary-side current, a primary-side voltage at a capacitance, or a secondary-side, rectified voltage. From the measurement of the magnitude is calculated a parameter for the symmetry deviation for which different symmetry measuring methods are proposed. A symmetry regulation arrangement utilizes the drive of the inverter, for example, the duty cycle of the pulse width modulated voltage produced by the inverter to minimize the parameter for the symmetry deviation.

Abstract: The invention relates to a power supply unit for supplying power to a plasma display panel, wherein an active network filter without electrical isolation is provided for the generation of an essentially constant DC voltage from an AC supply voltage, a DC-DC voltage converter being connected to the output of the active network filter with at least one first and one second output and with electrical isolation between the constant DC voltage and the outputs, a regulator being assigned to the DC-DC voltage converter to regulate the voltage at the first output, and a voltage actuator being connected in series at least to the second output.

Abstract: The present invention relates to an electrical circuit arrangement for producing a low power rectified low voltage from an AC line voltage, which consists of two circuit blocks combined together via an intermediate circuit, of which the first circuit block contains a capacitive input stage for producing a voltage-limited intermediate circuit voltage and of which the second circuit block has an asymmetric half-bridge, which is supplied by the intermediate circuit voltage and produces an AC voltage at a lower level than the line voltage, which is decoupled from the electrical supply system via a downstream transformer, transformed to the level of the low voltage and then rectified via a diode.

Abstract: The invention relates to a standby circuit, an electrical device with a standby circuit, a method for the control of the electrical device and a power supply assembly. Whereas the power supply unit and the control electronics are in permanent operation when conventional devices are in the standby mode and consequently have a high power consumption, the invention proposes a solution for saving energy while retaining convenience of operation by which the power supply unit is switched off in the standby mode. A standby circuit, preferably fed by an energy buffer element, remains active in the standby mode and monitors signal inputs for activation events. When an activation event occurs, the standby circuit switches on the power supply unit.

Abstract: In a voltage converter comprising a half bridge in the form of controlled semiconductor switches, a transformer and a rectifier circuit, in which a primary winding of the transformer connected in series with at least one capacitor is connected to the half bridge, the at least one capacitor is arranged such that the resonant frequency of the series combination of the at least one capacitor and an inductance which inductance is active when the rectifier circuit is in operation, is larger than half the pulse frequency with which the semiconductor switches are controlled. Similar measures can also be carried out with a voltage converter with a direct coupling, in which a longitudinal coil and a transverse coil then substitute for the transformer.

Abstract: A buck converter, boost converter or flyback converter is generally represented as a two-port having a primary side with a primary switching device (10; 38; 70; 98; 110), and a secondary side with a secondary switching device (20; 50; 80; 106). The primary switching device is controlled in such a way that the on-time is adapted to the voltage at the primary side of the converter. The relation between the on-time of the primary switching device and the primary voltage is a generally hyperbolic function.

Abstract: The invention relates to a resonant converter (1) which has multiple outputs (7a, 7b) and contains a transformer (4) with a primary winding (5) and at least two secondary windings (6a, 6b) having different winding directions. In this way it is possible to design as cost-effectively as possible a resonant converter with multiple outputs, two of which can be controlled separately from each other.

Abstract: The invention relates to a circuit for converting AC voltage into DC voltage for a consumer (RL), in which the AC voltage supplied is passed through a large induction coil (L50) and a rectifier (G). On the output side the rectifier (G) has two capacitors (C1, C2) connected in parallel, which are separated by a diode (D). In addition, the capacitor C1 positioned closer to the rectifier (G) is discharged at least in part via an active converter (20) in the second half of each power supply wave, as a result of which the current consumption is widened and the system harmonics are reduced. Furthermore, the induction coil (L50) can be dimensioned correspondingly smaller, but can nevertheless meet the relevant standards.

Abstract: The invention relates to a circuit for converting AC voltage into DC voltage for one or two consumers (Rm, Ra), in which circuit a first part of the current is fed to the input side via a large induction coil (L50) and a first rectifier (Gm) and a second part of the current via a second rectifier (Ga) upstream of the large induction coil. On the output side, behind the second rectifier (Ga), a switched-mode power supply is arranged, preferably in the form of an up-converter or a flyback converter (10). The division of the applied current for smoothing the output voltage provides that the induction coil (L50) can be accordingly dimensioned smaller and, despite this, the circuit can also satisfy relevant standard specifications.