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Original question:

LMR14206: Surge Current at input side.

LMR14206: Surge Current at input side.

Sagar Rathod
Prodigy 115 points
Part Number: LMR14206

Tool/software:

Hello,

I have tested LMR14206XMK/NOPB this IC for surge protection, and i had applied 2KV to Live to Neutral, But IC did not sustained the surge,  The circuit protection is in below attached image.

The previously I have  asked for the selection of the IC over same surge, so TI replied you can use it  but it fails for the Input mains surge testing.

Let me know if I am missing at input side 2KV live to N and N to Live circuit protection.

Suggestion of same is appreciable. 

Thank you.

  • 0
    TI__Mastermind 23815 points

    Hi Sagar,

    Our device only supports 45V max across it. Of course there will be damage to our device if it's no properly protected.

    If there's a 2kV surge there needs to be some protection in place in order to mitigate damage in the circuit down the line. Can you add a zener diode at VIN?

    Thanks,
    Andrew