Failure Analysis of ADuM3201

Dear Experts,

I have used ADuM3201 for basic interface isolation.

I made a mistake when I was testing the board in the field.

So that the overvoltage stress had been appeared in second side.

Then, the ADuM3201 was failure, the pin6 had a special output.

The pin3 input was whatever high or low, the pin6 of ADuM3201 had a fixed continuous 1us width pulse output.

I think the Watchdog circuit has been damaged, is it correct?

I think the ADuM3201 is a good part.

I just want to know that how about the failure happens, and what need I do in this status?

Add some devices for protection?

Thanks!

Yours Sincerely,

Tom

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