Control circuit, voltage source circuit, driving device, and driving method

A control circuit, comprising:

• a detection module configured to detect a current operating condition of a semiconductor switching device;
• a determining module configured to determine a gate allowable voltage of the semiconductor switching device based on the operating condition detected by the detection module;
• and
• an output module configured to output a control signal to a driving power supply circuit of the semiconductor switching device based on the gate allowable voltage determined by the determining module, to control the driving power supply circuit to provide a gate on voltage that is not higher than the gate allowable voltage and that is positively correlated with the gate allowable voltage for the semiconductor switching device,
• wherein the determining module comprises a first gate allowable voltage determining submodule configured to determine a first value of the gate allowable voltage based on the operating condition detected by the detection module, wherein the first value is not higher than a gate breakdown voltage of the semiconductor switching device, and
• the first gate allowable voltage determining submodule comprises:
• a gate breakdown voltage determining unit configured to determine the gate breakdown voltage of the semiconductor switching device based on the operating condition detected by the detection module;
• and
• a first gate allowable voltage determining unit configured to determine the first value based on the gate breakdown voltage determined by the gate breakdown voltage determining unit and a preset first margin.