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Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.

Michael Lenz

Frank-Lothar Schwertlein

Herbert Gietler

Albino Pidutti

Ricardo Erckert

Frank Auer

Damiano Gadler

Georg Pelz

Marco Piselli

Ioannis Pachnis

Wolfgang Horchler

Gunther Peruth

Matthias Kunze

Ralf Otremba

Martin Feldtkeller

Jakub Hirschberg

Hans G Strandberg

Dirk Ahlers

Andrea Logiudice

Michael Herfurth

Cristian Garbossa

Emanuele Bodano

Giorgio Chiozzi

Simone Massaro

Matthias Radecker

Helmut Bichler

Brigitte Stroetmann

Dusan Graovac

Herbert Roedig

Salvatore Piccolella

Gerald Mundel

Alberto Flore

Nicola Macri

Dan Dinu

Olaf Huckfeldt

Marco Puerschel

Harald Huber

Guenther Peruth

Gerrit Utz

Cristi Zegheru

Alexandru Simion

Andrei Covalenco

Joachim Glaeser

Yavuz Kilic

Alberto Gola

Daniel Bolohan

Rolf-Peter Goeser

Cristi-Stefan Zegheru

Franz Hoedlmayr

Detlef Clawin

Juergen Kositza

An integrated circuit includes a transistor having a control electrode and a load current path to activate and to deactivate a load current path between a first terminal and a second terminal. A diode is in parallel with the load current path of the transistor. The integrated circuit includes a detector circuit to generate a control signal depending on a voltage between the first terminal and the second terminal. The integrated circuit includes a driver circuit having a main branch and a first feedforward branch. The main branch includes circuit components to generate a control voltage for the control electrode of the transistor in accordance with the control signal, and the feedforward branch comprises circuit components to generate a charging current or, alternatively, a discharging current as a reaction to a slope of the control signal, the current charging or discharging, respectively, the control electrode of the transistor.

Diode circuit

A power semiconductor package includes a reference voltage terminal, a supply voltage terminal, a phase terminal, a first power transistor and a second power transistor. The first power transistor and the second power transistor are connected in series and form a low side switch and a high side switch of a half bridge circuit.

Power semiconductor package and applications

A rectifier is described herein. According to one example, the rectifier includes a semiconductor substrate and further includes an anode terminal and a cathode terminal connected by a load current path of a first MOS transistor and a diode that is connected parallel to a load current path. An alternating input voltage is operably applied between the anode terminal and the cathode terminal. Further, the rectifier includes a control circuit that is configured to switch the first MOS transistor on for an on-time period, during which the diode is forward biased. The first MOS transistor, the diode, and the control circuit are integrated in the semiconductor substrate.

Rectifier device with safety threshold

A rectifying device includes a power transistor, a gate control circuit and a capacitor structure arranged on a single semiconductor die. The power transistor includes a source or emitter terminal connected to a first terminal of the rectifying device, a drain or collector terminal connected to a second terminal of the rectifying device, and a gate. The gate control circuit is operable to control a gate voltage at the gate of the power transistor based on at least one parameter relating to at least one of a voltage and a current between the first terminal and the second terminal.

Rectifying devices and rectifier arrangements

A circuit arrangement includes a first number of loads connected in series. Each of a second number of drive units is coupled to at least one of the first number of loads, and is configured to assume a first operation state or a second operation state. A current source circuit is coupled in series with the first number of loads and is configured to control a load current.

Multi-load drive circuit

In one example, a circuit includes a first voltage converter and a second voltage converter. The first voltage converter is configured to convert a first voltage to a second voltage, determine whether the first voltage converter is operating in an unsafe state, and output an indication that the first voltage converter is operating in the unsafe state. The second voltage converter is configured to selectively activate a high side switch and a low side switch to convert the second voltage to a third voltage. In response to receiving the indication that the first voltage converter is operating in the unsafe state, the second voltage converter is further configured to activate the high side switch and the low side switch to establish an electrical path between the second voltage and a reference node of the circuit.

Safety crowbar for voltage converters

A circuit for operating a half-bridge is provided. The circuit may include a first multiplier circuit. The first multiplier circuit may be configured to multiply a first signal by a first factor to provide a turn-on signal. The turn-on signal may be configured to turn a first switch of the half-bridge on. The first multiplier circuit may be further configured to multiply the first signal by a second factor to provide a turn-off signal. The turn-off signal may be configured to turn a second switch of the half-bridge off. The first factor and the second factor may be chosen so that the second switch is turned off before the first switch is turned on.

Circuit and method for operating a half-bridge

A drive circuit includes a first input terminal configured to receive a first input signal, a first output terminal configured to provide a first drive signal, a second output terminal configured to provide a second drive signal, and a mode selection terminal configured to have a mode selection element connected thereto. The drive circuit is configured to generate the first and second drive signals dependent on the first input signal such that there is a dead time between a time when one of the first and second drive signals assumes an off-level and a time when the other one of the first and second drive signals assumes an on-level, and evaluate at least one electrical parameter of the mode selection element and is configured to adjust a first signal range of the first drive signal and a second signal range of the second drive signal dependent on the evaluated parameter and to adjust the dead time dependent on the evaluated parameter.

Drive circuit with adjustable dead time

In various embodiments a voltage regulating circuit is provided which may include a control transistor at least partially formed in an n-type substrate, and a regulating circuit including a regulating output coupled to a control region of the control transistor, wherein the regulating circuit includes at least one transistor which is formed at least one of on and in the n-type substrate.

Voltage regulator using N-type substrate

The invention relates to a voltage regulator having a differentiating circuit and an amplifier, the differentiating circuit being designed to detect a voltage at the voltage regulator connection and to provide it as a differentiated signal at its differentiating output, and the amplifier being designed to inject a compensation signal dependent on the differentiated signal into an input connection of an output circuit of the voltage regulator.

Voltage regulator with differentiating and amplifier circuitry

The invention relates to a relay controller for controlling an excitation current of a relay, wherein the relay controller is designed, upon the energization of the relay by means of a switch, to control the excitation current through the excitation winding of the relay in such a way that through the excitation winding there flows firstly a pull-in current and, after a pull-in time has elapsed, through the excitation winding there flows a holding current that is lower than the pull-in current, and wherein the relay controller is designed, upon the switching-off of the relay by means of the switch, to feed a commutation current that flows through the excitation winding to the commutation device through the first terminal and through the second terminal of the relay controller.

Relay controller

Relay controller for defined hold current for a relay

An embodiment of the invention relates to an apparatus including a power semiconductor device and a processor coupled thereto. The processor is configured to provide a control signal to the power semiconductor device to regulate an output characteristic of the apparatus. The processor models an internal characteristic of the power semiconductor device and alters the control signal if the modeled internal characteristic crosses a threshold value. In an exemplary embodiment, the internal characteristic is a channel temperature of a MOSFET. A sensor such as a thermistor is coupled to or included within the processor to sense a parameter separate from the power semiconductor device, such as a processor temperature, and the processor is configured to adapt the modeled internal characteristic to the sensed parameter.

Apparatus for detecting a state of operation of a power semiconductor device

Embodiments of the invention relate to drivers and methods for driving devices, comprising at least one functional unit at least one of which is adapted to deduce a device parameter of an electronic device from a terminal parameter of the electronic device.

Driver and method for driving a device

The invention relates to a relay controller () for controlling an excitation current of a relay (), wherein the relay controller () is designed, upon the energization of the relay () by means of a switch (), to control the excitation current through the excitation winding () of the relay () in such a way that through the excitation winding () there flows firstly a pull-in current and, after a pull-in time has elapsed, through the excitation winding there flows a holding current that is lower than the pull-in current, and wherein the relay controller () is designed, upon the switching-off of the relay by means of the switch (), to feed a commutation current that flows through the excitation winding () to the commutation device () through the first terminal () and through the second terminal () of the relay controller ().

Relay controller for controlling an excitation current of a relay

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Zorneding, Germany

Michael Lenz