That's what overvoltage protection is made for : ....


Well, yeahbut...

Ellipse's method avoids the situation in the first place...




The Ellipse's method is just for the load dump case, with a perfectly
working voltage regulator.
Now, what if it is the regulator that goes berserk ?

An overvoltage protection is intended to catch ANY OV condition,
regardless of it's cause.

Regards,
Gilles Thesee
Grenoble, France
http://contrails.free.fr