A current sensing circuit includes a current detection unit having a first resistance element; a first MOS-transistor and a first constant current source connected between a first output end of the current detection unit and a ground terminal; a second MOS-transistor and a second constant current source connected between a second output end of the current detection unit and the ground terminal; a third MOS-transistor having a source connected to the first output end and a gate connected to a drain of the second MOS-transistor; a second resistance element connected between an output terminal and the ground terminal; and a high withstand-voltage MOS-transistor connected between the third MOS-transistor and the output terminal to receive a predetermined control voltage, wherein the gates of the first and second MOS-transistors are commonly connected, and the gate of the first MOS-transistor is connected to the drain thereof.

An electronic switch has a first, a second and a third connection and is configured to disconnect a current flow between the first and the second connection. An energy source is connected between the first and the third connection, and a regenerative load is connected between the second and the third connection. The electronic switch includes a semiconductor switch capable of switching currents of different polarity. A fuse is connected between the first connection and the semiconductor switch. A first short-circuiter is connected between the input of the semiconductor switch and the third connection, and a second short-circuiter is connected between the output of the semiconductor switch and the third connection. The fuse has a current trigger threshold between a permanently permitted current and a maximally permitted current of the semiconductor switch. An electrical network having such electronic switch and a method for operating an electronic switch are disclosed.

An electrical device includes an electrical load, an electronic switch with an electronic switching element and a driver controlling the electronic switching element, and at least one pulsed power supply having a power unit coupled with the electronic switching element and configured to generate an electrical supply current for the electrical load from a voltage based on alternately turning on and off the electronic switching element. During operation of the power supply, an electrical current associated with the electronic switching element flows through a current path. A pulse transformer has a primary side coupled with the power unit such that the electrical current flows through a primary-side winding. A comparator compares a secondary-side electrical voltage or a filtered secondary-side electrical voltage of the transformer, and an evaluation device coupled with the comparator detects potential defects of the electronic switch based on the result of the comparison.

An electrical device includes an electrical load, an electronic switch with an electronic switching element and a driver controlling the electronic switching element, and at least one pulsed power supply having a power unit coupled with the electronic switching element and configured to generate an electrical supply current for the electrical load from a voltage based on alternately turning on and off the electronic switching element. During operation of the power supply, an electrical current associated with the electronic switching element flows through a current path. A pulse transformer has a primary side coupled with the power unit such that the electrical current flows through a primary-side winding. A comparator compares a secondary-side electrical voltage or a filtered secondary-side electrical voltage of the transformer, and an evaluation device coupled with the comparator detects potential defects of the electronic switch based on the result of the comparison.

Disconnection of a circulation path through which a circulation current flows is detected while suppressing an increase in circuit scale. A battery monitoring device includes switching circuits that control currents flowing through coils of main contactors by being controlled to be turned on and off, freewheeling diodes that are connected to the coils of the main contactors to form circulation paths for circulating the currents, and a control unit. The control unit measures output voltages of the freewheeling diodes at an input terminal, and detects the disconnection of the circulation paths based on the output voltages of the freewheeling diodes.

Reliability of a semiconductor device is improved. In the semiconductor device SA1, a snubber capacitor pad SNP electrically connected to the capacitor electrode of the snubber capacitor is formed on the surface of the semiconductor chip CHP.

The invention relates to a method and an actuation assembly (3) for actuating a MOSFET (1), in particular a MOSFET (1) based on a semiconductor with a wide band gap. According to the invention, a characteristic block is generated in which a change (ΔU1, ΔU2, ΔR1, ΔR2) in at least one actuation variable (U1, U2, R1, R2) for actuating the MOSFET (1) with respect to a reference actuation value of the actuation variable (U1, U2, R1, R2) is stored on the basis of at least one operating characteristic variable (U, T) which influences the switching behavior of the MOSFET (1), said change counteracting a change in the switching behavior as a result of the at least one operating characteristic variable (U, T). During the operation of the MOSFET (1), an actual value of the at least one operating characteristic variable (U, T) is ascertained, and the reference actuation value of the at least one actuation variable (U1, U2, R1, R2) is changed according to the characteristic block depending on the actual value of the at least one operating characteristic variable (U, T).

An integrated circuit is described herein. In accordance with one embodiment the circuit includes a transistor coupled between a supply pin and an output pin, a current output circuit configured to provide a diagnosis current at an current output pin, a current sensing circuit coupled to the transistor and configured to generate a first current sense signal indicative of a load current passing through the transistor and a second current sense signal indicative of the load current. The current output circuit is configured to select, dependent on a control signal, one of the following as diagnosis current: the first current sense signal and the second current sense signal.

In accordance with an embodiment, a circuit for driving an electronic switch includes a control circuit configured to trigger a switch-on and a switch-off of the electronic switch in accordance with an input signal, wherein the control circuit is further configured to trigger the switch-off of the electronic switch in response to an under-voltage signal signaling an under-voltage state; and an under-voltage detection circuit configured to signal the under-voltage state when a supply voltage received at a supply node is below an under-voltage threshold value, wherein the under-voltage threshold value depends on a load current passing through the electronic switch.

The driver circuit includes DC cut capacitors, an input buffer, input termination resistors connected in series between differential input signal terminals and an ESD protection circuit connected to a connection point of the input terminal resistors. The ESD protection circuit includes diodes.