Circuit arrangement for current limiting and electrical system

A circuit arrangement (5) for current limiting, the circuit arrangement comprising:

• a first inductor (L1),
• a second inductor (L2),
• a current limiting control circuit (10),
• a resistor (R),
• a capacitator (C),
• a semiconductor switch (20),
• a gate driver (25), and
• a gate resistor (RG),
• wherein
• an output terminal (12) of the current limiting control circuit (10) is connected to a control input (22) of the semiconductor switch (20) via the resistor (R),
• the gate driver (25) is connected via the gate resistor (RG) to the control input (22) of the semiconductor switch (20) and to the limiting resistor (RB) and is configured so as to control the semiconductor switch (20) to open and close,
• the current limiting control circuit (10) is configured so as to change an output impedance of the current limiting control circuit (10) at the output terminal (12) in order to control the semiconductor switch (20),
• a source terminal of the semiconductor switch (20) is connected to a reference potential (GND) of the circuit arrangement (5), and wherein the semiconductor switch (20) is configured so as to set a current (I) in a circuit between an electrical power source (30) and a load (40) as a function of a control by the current limiting control circuit (10),
• the first inductor (L1) and the second inductor (L2) are connected in series within the circuit,
• a first input terminal (14) of the current limiting control circuit (10) is connected via the capacitator (C) to a node between the first inductor (L1) and the second inductor (L2),
• a second input terminal (16) of the current limiting control circuit (10) is connected to the reference potential (GND), and
• the current limiting control circuit (10) is configured so as to detect an overcurrent-related reloading of the capacitator (C) and in response reduce its output impedance in order to thus increase an output impedance of the semiconductor switch (20) on the basis of a voltage drop across the resistor (R), so that the increased output impedance in the semiconductor switch (20) counteracts the overcurrent.