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TPS2660: Surge Application issues of chips

Part Number: TPS2660


Tool/software:

The Efuse test surge of -1KV used in our project can cause the load side circuit to break down and catch fire;
What is the response time of TPS2660 internal cut-off MOSFET?

The application is as shown in the above figure

Test conditions: Input terminal powered by 24V, loading -1kV differential mode surge test will burn out the subsequent circuit

What could be the possible cause of this damage?

Please help to determine if it is a design issue or if this chip is not suitable for this application, and provide a solution. Thank you!