hi
thankyou for reminding me of that thread, which i have read many times, and each time i learn something new.
but the zener in that thread, in my opinion is placed wrongly............the way it is in thread 143544, it would badly affect transient performance, and also be wasteful of energy
do you agree?
I think the place for the zener is in series with RS in the schematic of my post above top.(?)
The TLVH431 does not care what its cathode voltage is, (as long as its below 20v )......all it does is draw as much current through its cathode as it takes to keep its reference terminal at VREF = 1.24V (?)