Abstract: A circuit arrangement and also a method for controlling a bistable magnetic valve in which a magnetic valve is to be supplied with a pulse of electrical current in order to switch over the magnetic valve from a first stable state into a second stable state, comprises a power supply source to provide a supply voltage, a power supply device fed by the power supply source and able to be activated for the duration of the current pulse by an entered control signal (Enable) to create a coil current (I) flowing through the magnetic coil, with the coil current (I) being set to a setpoint, where changeover means are provided in order to reduce the setpoint of the coil current during the current pulse. This advantageously allows the power dissipation of the activation of bistable magnetic valves to be reduced.

Abstract: A device and a method are provided for equalizing the charge of the capacitors belonging to a double layer capacitor. The device includes an individual transformer associated with each individual capacitor and a flyback transformer or a spool, from which the energy is transferred, via the individual transformers, to the individual transformer, by the respective low charge. Conclusions on the state of the double layer capacitor and the charge-equalizing switch are derived from the measured charging time and discharging time of the flyback transformer.

Abstract: A device for protecting electronic modules in a multivoltage on-board electrical wiring system comprising a first accumulator of a low on-board electrical wiring system voltage, against short circuits after a high on-board electrical wiring system voltage, consisting of a transistor whose drain-source path is inserted between the control device connection and the electronic module connection. The source connection of the transistor is linked to the electronic module connection. A gate resistor and a diode guiding the current in the direction of the plus pole of the first accumulator are parallel-mounted between the gate connection of the transistor and the plus pole of the accumulator. A Zener diode is arranged between the gate connection and source connection of the transistor.

Abstract: An auxiliary power source (HQ) constructed with conventional components for generating an auxiliary voltage lying above the voltage of a power supply source (U1), in particular for triggering an n-channel MOS transistor (T11) used as a high-side switch for switching a load (I1). An energy store (L1) is connected via a switching element (T1) to the power supply source (U1) and an auxiliary voltage is generated at a power output (U3).

Abstract: The invention relates to an operating method for an electrical circuit with an energy store (5), made from several storage elements (C2-C5) and a charge-equalisation circuit (6), for charge equalisation between the individual storage elements (C2-C5) of the energy store (5), comprising the following steps: charging the energy store (5) and charge equalisation between the individual storage elements (C2-C5) of the energy store (5) by means of the charge equalisation circuit (6). The invention further relates to a corresponding electrical circuit for carrying out said operating method.

Abstract: Device for supplying power to a two-voltage vehicle electrical system equipped with safety-relevant components with an integrated starter-generator mechanically coupled with an internal combustion engine BKM, a double-layer capacitor DLC, a first and second energy accumulator B1, B2, with power being able to be supplied to safety-relevant components V1s via three safety switches X1 to X3, alternately by the starter-generator ISG, the double-layer capacitor DLC, the first or the second energy accumulator B1, B2.

Abstract: A circuit arrangement for rapidly switching in particular inductive loads, comprises a load (11) being connectable to a supply voltage source (31) by means of a switching transistor(41) implemented as an N-channel MOS power transistor and connected as a high-side switch, a potential exceeding the voltage of the supply voltage source (31) being applicable to the gate electrode of the switching transistor (41) by controllable switching means, said switching means incorporating at least a first switching-means transistor (52) whose collector current can flow at least in part to the gate electrode of the switching transistor (41) during the conducting state. The first switching-means transistor (52) is connected as a current source. Furthermore, the first switching-means transistor (52) connected as a voltage source can be part of a current mirror circuit.

Abstract: The invention relates to a method for actuating a semiconductor power switch, by which means the resistance of the switching path (E-A) of the semiconductor power switch is controlled by a control voltage (Vst) in such a way that the chip temperature (T1ist, T2ist) of the power switch (S1, S2) does not exceed a pre-determined nominal value (Tsoll). When the nominal temperature (Tsoll) is reached, the resistance of the switching path (E-A) is increased. The invention also relates to a device for carrying out said method, said device using a transfer gate (TG) controlled by a charge pump (LP) as a semiconductor power switch. Commercially available transistors comprising integrated temperature sensors are used in the transfer gate (TG) as semiconductor power switchs.

Abstract: The invention relates to a method and a device for switching on a power switch (S1, S2) arranged between capacitive elements (C1, DLC, B36) a choke (L) being connected in parallel to the switching contacts of the still open power switch (S1, S2). Said choke enables compensating currents to flow between the elements (C1, B36, DLC) to be interconnected and to decay before the power switch (S1, S2) is then closed in a de-energized manner.

Abstract: A circuit arrangement for switching an inductive load (12, 12a-d) with connections to a power supply source (11, 11?, 11?) by means of which an exciter voltage can be applied to the inductive load (12, 12a-d) in a switched-on state is described, comprising switching means by means of which, depending on a control signal, a power circuit comprising the inductive load (12, 12a-d) and the power supply source connections, can be closed when switched from the switched-off to the switched-on state and opened when switched from the switched-on to the switched-off state, furthermore comprising a first diode (15, 15a-d, 15a?-c?, 15a?-c?) arranged in parallel with the inductive load (12, 12a-d) and so as to block in the switched-on state. This present invention is characterized in that an additional commutation inductance (18) is provided which is arranged in parallel with the inductive load (12, 12a-d) and in series with the first diode (15, 15a-d, 15a?-c?, 15a?-c?).

Abstract: A low-frequency PWM-modulated signal and a high-frequency, unmodulated signal for generating a high-frequency PWM-modulated signal is employed directly for driving an output stage of a device for noise suppression. The low-frequency signal and the high-frequency signal is advantageously provided by a microcontroller which already has an AD converter on the input side. The microcontroller furthermore already makes a PWM output signal with a high bit width available which has the high resolution necessary for driving the loudspeaker.

Abstract: Circuit layout to control at least one electrical component of a motor vehicle via a control signal, wherein the circuit layout comprises a digital control unit that provides an output signal during its operation, the circuit layout has a supply terminal, and the digital control unit starts its operation when the supply terminal has an operating voltage above a predetermined threshold value. The digital control unit stops its operation when the supply terminal has an operating value below the threshold value, wherein the circuit layout comprises a circuit block in order to provide for the control signal, during the operation of the digital control unit the circuit block provides for the control signal based on the output signal of the digital control unit, and the circuit block maintains the momentary control signal for a predetermined period of time after the operation of the digital control unit is ended.

Abstract: Circuit arrangement and method for controlling a bistable magnetic valve A circuit arrangement and also a method for controlling a bistable magnetic valve in which a magnetic valve is to be supplied with a pulse of electrical current in order to switch over the magnetic valve from a first stable state into a second stable state, comprises a power supply source to provide a supply voltage, a power supply device fed by the power supply source and able to be activated for the duration of the current pulse by an entered control signal (Enable) to create a coil current (I) flowing through the magnetic coil, with the coil current (I) being set to a setpoint, where changeover means are provided in order to reduce the setpoint of the coil current during the current pulse. This advantageously allows the power dissipation of the activation of bistable magnetic valves to be reduced.

Abstract: An auxiliary power source (HQ) constructed with conventional components for generating an auxiliary voltage lying above the voltage of a power supply source (U1), in particular for triggering an n-channel MOS transistor (T1) used as a high-side switch for switching a load (I1). An energy store (L1) is connected via a switching element (T1) to the power supply source (U1) and an auxiliary voltage is generated at a power output (U3).

Abstract: A circuit arrangement for rapidly switching in particular inductive loads, comprises a load (11) being connectable to a supply voltage source (31) by means of a switching transistor(41) implemented as an N-channel MOS power transistor and connected as a high-side switch, a potential exceeding the voltage of the supply voltage source (31) being applicable to the gate electrode of the switching transistor (41) by controllable switching means, said switching means incorporating at least a first switching-means transistor (52) whose collector current can flow at least in part to the gate electrode of the switching transistor (41) during the conducting state. The first switching-means transistor (52) is connected as a current source. Furthermore, the first switching-means transistor (52) connected as a voltage source can be part of a current mirror circuit.

Abstract: A circuit arrangement for switching an inductive load (12, 12a-d) with connections to a power supply source (11, 11′, 11″) by means of which an exciter voltage can be applied to the inductive load (12, 12a-d) in a switched-on state is described, comprising switching means by means of which, depending on a control signal, a power circuit comprising the inductive load (12, 12a-d) and the power supply source connections, can be closed when switched from the switched-off to the switched-on state and opened when switched from the switched-on to the switched-off state, furthermore comprising a first diode (15, 15a-d, 15a′-c′, 15a″-c″) arranged in parallel with the inductive load (12, 12a-d) and so as to block in the switched-on state.