Power Systems Technologies Gmbh

Friwo Mobile Power Gmbh

Friwo Geratebau Gmbh

Stefan Mörbe

Michael Bothe

Michael Becks

Peter Grad

The invention relates to an input circuit for a logic circuit part, comprising a voltage converter component for conversion of a mains voltage to the required low voltage in order to supply a user with a low voltage. The supply to the input circuit may hence be connected to a mains supply to rectify the mains voltage and an output from the input circuit may be connected to the voltage converter component to provide a rectified input voltage for the voltage converter component. According to the invention, an improved input circuit for a logic circuit part with improved functionality and operating security also permitting an extensive miniaturization and simplified production may be achieved by replacement of at least two of the remaining four diodes in the rectifier part of an input circuit for a logic circuit part by two controllable switches which work as a synchronous rectifier and are connected such as to be switched on and off by alternate forced control.

Input circuit for a switch-mode power supply

The present invention relates to a power supply circuit comprising at least one transformer which is connected to a primary side circuit and to a secondary side circuit. The present invention further relates to a method for producing such a power supply circuit. To provide an improved power supply circuit which has a reduced size and increased power density and offers more flexibility in the formation of the safety distances between primary side and secondary side, the primary side circuit and the secondary side circuit are each mounted on at least one separate circuit carrier, said circuit carriers being mechanically and electrically coupled to one another and arranged in at least two different planes. According to advantageous embodiments, said circuit carriers may be arranged in planes that are either parallel with or transverse to one another.

Power supply circuit with three-dimensionally arranged circuit carriers, and production method

The invention under consideration refers to a circuit arrangement for a switch-mode power supply, wherein the switch-mode power supply has a primary side, which can be connected to a supply voltage, and a secondary side, which can be connected to a consumer, and wherein the circuit arrangement comprises a primary-sided switch, a control circuit for controlling the primary-sided switch and additional active primary-sided components. Furthermore, the invention under consideration also refers to a switch-mode power supply with an active primary-sided circuit arrangement of that type. In order to specify an improved circuit arrangement that overcomes the disadvantages of the known solutions and that makes it possible to assemble a switch-mode power supply in miniaturised form in a manner that is particularly simple and economical while still complying with applicable safety standards, the control circuit is formed by a first integrated semiconductor chip and the primary-sided switch and the additional components are integrated in at least one additional semiconductor chip, said semiconductor chip being separate from the control circuit and being arranged on a single circuit carrier shared with the control circuit.

Active primary-sided circuit arrangement for a switch-mode power supply

A flexible flat conductor and a power supply unit including the flexible flat conductor. The flexible flat conductor includes at least two electrically conductive layers which are at least partially surrounded by an electrically insulating cover. The electrically conductive layers are insulated from one another by at least one dielectric layer arranged therebetween. At least a first one of the electrically conductive layers is patterned in at least one subarea thereof by openings in such a way that a plurality of meandrous elements is formed. The meandrous elements are serially juxtaposed in a plane defined by the fiat conductor, so as to form a filter structure.

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Hasbergen, Germany

Stefan Mörbe