LT8315 issues

In reply to the discussion :

Inductor Voltage rating :400v

Switch current limit :270mA

Again IC failed with same burnt mark after replacing standard inductor with high voltage inductor. 

So far, IC failed in 2 units. 

What could be the reason for the failure. 

Refer the Schematics attached in previous discussion referred above. 

Suggest a suitable solution at the earliest which would be helpful for us. 

With regards 


changed title
[edited by: JValeriani at 12:21 PM (GMT 0) on 23 Sep 2019]