Semiconductor device

A semiconductor device which drives first and second semiconductor switching elements connected in series, the semiconductor device comprising:

• a first drive circuit configured to control on and off of the first semiconductor switching element;
• and
• a second drive circuit configured to control on and off of the second semiconductor switching element,
• the first semiconductor switching element including a first positive electrode and a first negative electrode as main electrodes and first and second control electrodes,
• the second semiconductor switching element including a second positive electrode and a second negative electrode as main electrodes and third and fourth control electrodes, the second positive electrode being electrically connected to the first negative electrode,
• the first drive circuit including
• a first drive circuit unit configured to control a voltage of the first control electrode with respect to the first negative electrode, and
• a second drive circuit unit configured to control a voltage of the second control electrode with respect to the first positive electrode,
• the second drive circuit including
• a third drive circuit unit configured to control a voltage of the third control electrode with respect to the second negative electrode, and
• a fourth drive circuit unit configured to control a voltage of the fourth control electrode with respect to the second positive electrode,
• each of the first to fourth drive circuit units including
• a signal processing circuit configured to output a pulse signal serving as a voltage command for a corresponding control electrode of the first to fourth control electrodes in response to an on and off command to turn on and off the first and second semiconductor switching elements, and
• an output circuit configured to drive a voltage of the corresponding control electrode with respect to a corresponding main electrode of the first and second positive electrodes and the first and second negative electrodes in response to the pulse signal from the signal processing circuit,
• each of the first, second and fourth drive circuit units being configured to transmit the pulse signal from the signal processing circuit to the output circuit through an isolation structure.