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Accurate, Adjustable SCR Crowbar Circuit For Overvoltage Protection Using TL431 Reference

Critical circuits may require protection from a damaging overvoltage due to power supply or other failure. For example, a typical failure in a buck switching regulator is a short in the series switching MOSFET, which then applies the full input...
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Hey! Very nice! I have a question. Where did you get the symbol for the shunt regulator? Did you draw it yourself? I can't find it in the LTSpice library. Cheers
Very Interesting.
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