today i got this Philips SND 58 digital ignitor, in its scheme it represents a ballast with 3 connections. i was wondering if there’s a wiring that works for normal 2 connections ballast. thanks

Not sure to be honest, it may just be a case of ignoring the 3rd connection, but then again it may not..!

You might want to post the picture in the gallery as well.

For info, you originally posted this in questions and suggestions, that is more for questions/suggestions about the site.

I think this ignitor is for ballasts with an ignition tap. This is a semi-parallel ignitor.

It is a semiparallel ignitor, requiring a tap in 20% of the winding (from the line input end).
Note with these ignitors the use of  the PFC capacitor is a must, because they serve double role, they form the low impedance path for the "primary" ignitor circuit (the ignitor generates the ~600V pulse between "tab" vs "Neutral", but the ballast needs the pulse between the "Line input" vs "tab" terminals in order to properly generate the 3kV ignition pulses at the "Lamp" output terminal), the peak currents there are rather high and virtually any extra impedance between the ignitors "Neutral" and the ballast "Line" will reduce the output ignition pulse voltage.