IGNITION DEVICE OF INTERNAL COMBUSTION ENGINE

A control circuit 130 carries out ON/OFF control of a primary current flowing in an ignition coil in response to an input ignition control signal. The control circuit 130 and an insulated-gate bipolar power transistor (IGBT) 110 are integrated on a monolithic silicon substrate. The control circuit 130 includes a plurality of control circuit blocks of different functions formed on the silicon substrate. The circuit functions of the control circuit blocks are enabled and disabled by changing wiring patterns.