Circuit arrangement including voltage supply circuit

A circuit arrangement comprising:

• first and second input voltage terminals for applying an input voltage;
• at least one first semiconductor switching element having a drive terminal and a load path, the load path being connected between the input voltage terminals;
• a drive circuit having supply terminals for receiving a supply voltage, and having a drive output connected to the drive terminal of the at least one semiconductor switching element;
• a free-running oscillator having supply terminals, and an oscillator output, the oscillator output being connected between the first and second input voltage terminals by using its supply terminals, the oscillator being designed to generate an oscillating output voltage at the oscillator output;
• a voltage supply circuit having input terminals for receiving the oscillating output voltage or a voltage dependent on the oscillating output voltage, and having output terminals for providing the supply voltage of the drive circuit;
• and
• at least one series circuit comprising a rectifier element and a capacitive storage element, said at least one series circuit being connected between the input terminals of the voltage supply circuit, wherein the capacitive storage element is coupled to the output terminals of the voltage supply circuit.

A circuit arrangement comprising:

• first and second input voltage terminals for applying an input voltage;
• at least one first semiconductor switching element having a drive terminal and a load path, the load path being connected between the input voltage terminals;
• a drive circuit having supply terminals for receiving a supply voltage, and having a drive output connected to the drive terminal of the at least one semiconductor switching element;
• a free-running oscillator having supply terminals, and an oscillator output, the oscillator output being connected between the first and second input voltage terminals by using its supply terminals, the oscillator being designed to generate an oscillating output voltage at the oscillator output;
• a voltage supply circuit having input terminals for receiving the oscillating output voltage or a voltage dependent on the oscillating output voltage, and having output terminals for providing the supply voltage of the drive circuit;
• and
• a half-bridge circuit having two semiconductor switching elements each having a drive terminal and a load path, the load paths of which are connected in series between the supply terminals of the oscillator wherein a circuit node between the load paths of the two semiconductor switching elements forms the oscillator output;
• a first oscillator unit connected to the drive terminal of the first semiconductor switching element of the half-bridge circuit;
• and
• a second oscillator unit connected to the drive terminal of the second semiconductor switching element of the half-bridge circuit.

A circuit arrangement comprising:

• first and second input voltage terminals for applying an input voltage;
• at least one first semiconductor switching element having a drive terminal and a load path, the load path being connected between the input voltage terminals;
• a drive circuit for receiving a supply voltage, and having a drive output connected to the drive terminal of the at least one semiconductor switching element;
• a free-running oscillator configured to generate an oscillating output voltage;
• and
• a voltage supply circuit configured to receive the oscillating output voltage or a voltage dependent on the oscillating output voltage, and for providing the supply voltage of the drive circuit.