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LM5069: Mosfet burn after connecting 48V

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Part Number:LM5069

Hi Ti,

I am designing a Surge Stopping and Reverse Voltage Protection with the LM5069 which follows the design from Ti reference link as below.

http://www.ti.com/lit/an/snva683/snva683.pdf

I had catered in my design D3 is for reverse polarity protection. During I connect my input to 48V and found that the Q1 Mosfet  will burn and the Mosfet is 80V 62A and it should be able to withstand. Please see attached schematic and advise accordingly.


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