ST reference

ST Microelectronics created an application note AN819 in 1995:

It is short but very informative with a lot of diagrams. So it is highly recommended for reading when you are interested in CDI technology.

ST documents

There are a few documents about ignition knowledge published by ST.

CAPACITIVE DISCHARGE PRINCIPLE: dsa0030910.pdf

CAR IGNITION WITH IGBTS (1999): cd00003911.pdf

High voltage ignition coil driver power integrated circuit: VB525SP-E (2010): cd00286281.pdf

High voltage ignition coil driver power integrated circuit: VB526SP-E (2010): cd00286429.pdf