Ignition device

An ignition device for generating a spark discharge at a spark plug based on a first voltage and a plurality of second voltages higher than the first voltage, the first voltage being supplied from a first supply, each of the plurality of second voltages being supplied from a respective one of a plurality of second supplies, the ignition device comprising:

• the plurality of second supplies;
• a primary coil including a center tap, a first terminal on a ground (GND) side of the center tap, and a second terminal on a first-supply side of the center tap;
• a secondary coil electromagnetically coupled to the primary coil and electrically connected to the spark plug;
• a first switch configured to make or break an electrical connection between the first terminal and GND;
• a plurality of second switches, each of the plurality of second switches being configured to make or break an electrical connection between a respective one of the second supplies and the center tap;
• a third switch configured to pass or interrupt a current from the second terminal to the first supply;
• and
• a controller configured to control an on/off state of each of the first switch, the second switch, and the third switch.