Advanced Member level 4
i have an IC working from voltage 0 to 20V. I will shutdown the supply if the voltage exceeds 20V. But at the same time, i want to allow the circuit to be operational for a 40V transient(may be termed as long time transient)occurring for a minute. Can you let me know how to design a input circuit for this IC? If i keep a capacitor the time is too long to maintain the voltage constant which will make the capacitor value huge. Instead if zener diode is used there is a series resistor coming into picture which will have a series drop. Instead if I use varistor or TVS devices the voltage rating will be too high. What can be done to hold such a pulse and maintain the IC running?