On the brighter side, by the time this is solved you will be a true expert on transients. That is marketable knowledge, I am sure. The only other suggestion is some kind of electronic fuse - you know, the kind that will reset once power is removed. I have not used them in my own designs, but I have seen electronics with them on the input of circuit boards.
Let me get this straight - the mosfet is totally on, so the voltage drop between the source and sink of the mosfet is low. Now the wire gets disconnected. Maybe this isn't just a simple spike.
What if the spike causes the voltage of the source/sink to change relative to the gate and now the mosfet is no longer fully on.
I can't say much more without seeing the diagram, but I think you are on the right track by trying to manipulate the gate relative to the source/sink. Can you size a cap there to cause the voltage of the spike to keep the mosfet on long enough to get through the danger period?
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STO-P website.
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What if the spike causes the voltage of the source/sink to change relative to the gate and now the mosfet is no longer fully on.
I can't say much more without seeing the diagram, but I think you are on the right track by trying to manipulate the gate relative to the source/sink. Can you size a cap there to cause the voltage of the spike to keep the mosfet on long enough to get through the danger period?
Cheers!
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