Sorry, I wasn't clear. I am actually doing overvoltage protection circuit using the commonly used Zener diode (going to use it in Reverse-Bias Operation). During reverse-bias configuration below breakdown voltage, there's ideally no current passing in the diode. But when it reaches the voltage breakdown, the current would start to flow.
I am trying to find a way to kind of harvest that excess current to the inductor for a little time and store it to a capacitor. Something like this picture but add a reverse biased diode after the supply and in parallel with LC.
View attachment 157704
I have actually tried to simulate it and at first, it's okay. But after the capacitor's reached its stable voltage, the vout started to be similar with the input's value (it isn't protecting anymore).
Please let me know what you think. Thank you.