Sometimes, 'die' is a verb and a noun simultaneously. The majority of silicon in this chip is a big switching fet, but it's uninjured: the controller was what blew out. That's weird. Usually largely signal-oriented silicon can't draw enough power to decap a chip. It's still useful to know for potential applications.
Well that really sucks the excitement out of it. Some people think that it is the smoking gun during troubleshooting, but really it may just be a symptom. Nothing worse than thinking you found the actual problem replace the components and it still doesn't work correctly.
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