Ignition apparatus and control method thereof

An ignition apparatus of an engine, comprising:

• a spark plug disposed in a combustion chamber of the engine and configured to generate a spark discharge between a center electrode and a ground electrode;
• a plurality of ignition coils each configured to apply a current to the spark plug and comprising a primary coil, a secondary coil, a main switch configured to selectively provide current to the primary coil, and an auxiliary switch connected in parallel to the primary coil;
• and
• a controller configured to:
• based on an operation region of the engine, selectively perform (i) a multi-stage ignition through a first ignition coil and a second ignition coil among the plurality of ignition coils or (ii) a single-stage ignition through one ignition coil among the first ignition coil and the second ignition coil,
• based on a driving point of the engine, adjust a charging speed, a number of discharges, and a discharge maintaining period of the ignition coil that is selected to perform the ignition, and
• adjust the charging speed of the ignition coil and a target air/fuel ratio to perform lean combustion based on a state of charge (SOC) of a battery.