High-withstand-voltage integrated circuit

A high-withstand-voltage integrated circuit comprising:

• a first main power-source terminal for providing a high main power-source potential;
• a power-output terminal;
• a second main power-source terminal for providing a low main power-source potential;
• a plurality of power sources for providing different potentials between the high and low main power-source potentials, comprising a low-potential power source and a high-potential power source;
• respective-potential circuits comprising a low-potential circuit connected to the low-potential power source and said low main power-source potential and a high-potential circuit connected to the high-potential power source and said high main power-source potential, each respective-potential circuit having a respective high-potential side and a respective low-potential side with potential of the high-potential side of the high-potential circuit being higher than potential of the high-potential of the low-potential circuit and with potential of the low-potential side of the high-potential circuit being higher than potential of the low potential side of the low-potential circuit;
• a first interface-circuit means connected between the low-potential circuit and the high-potential circuit for transmitting signals between the low-potential circuit and the high-potential circuit;
• and
• an output-stage power element connected between the first main power-source terminal and the power-output terminal, a control electrode of the output-stage power element being connected to one of the respective-potential circuits.