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LTC4364-2 MOSFET M1 Failure

Category: Hardware
Product Number: LTC4364

Hi Team,

We are using LTC4364 IC in a surge protection circuit as given below.

V(IN): 48V

V(OUT): 48V upto 7.3A load

Selected MOSFET part number is marked in the given circuit image.

Surge Protector Circuit

The circuit works fine at the start but over a long run (say one or 2 months), we are facing MOSFET burning out issues. We cannot find the root cause of this issue.

Would you please look into it and direct us towards the solution?

Thanks,

Harish I I