Hi I am using LNK306PN for one of the Universal motor control application. during our life test its working fine.
during Surge test we are facing some problem. 0.5KV differential there is no problem.
when we put 1KV differential pulse its failing. i don't have a speciality to monitor the output voltage. after test i analysed . my controller is failed which is connected across the 5V supply.
i am using 320V MOV in the supply line. its non isolated power supply.
i have attached the schematic. please help me.