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TPS563203EVM: IC burnt at power on/off test.

David Kim2
Expert 2925 points
Part Number: TPS563203EVM
Other Parts Discussed in Thread: TPS563203,

Tool/software:

Hi

The client company is conducting an IC(TPS563203) verification test. Testing with TPS563203EVM.

However, there is a phenomenon in which the IC is burned during the input power on/off test.

The conditions are as follows.

-Input: Adapter(DC 12V)

-Output: 1V 3A

-Change point: C2(10uF) delete


Our guess is that the input voltage is high when on/off, so the ic dies.

Is there anything you can guide me to prevent?

Thanks

  • 0
    TI__Mastermind 23620 points

    Hi David,

    Thanks for reaching out. Could you pls share me customer, EE/application and volume?

    Do they test with TPS563203EVM board or customer's board and found IC damaged?

    Thanks!

    BRs

    Lucia

  • 0 in reply to Lucia Gao
    Expert 2925 points

    Hi Lucia

    Thanks for your support. 

    Pls refer to below.

    Application: Set top box

    Volume: 500K/yr 

    Remark: 

    I tested it with them on EVM and checked the IC damage.
    There is no IC damage on the customer's board.
    I think it's okay to add a TVS diode to the input, so can you guide me like that?

    Thanks

  • 0 in reply to David Kim2
    TI__Mastermind 23620 points

    Hi David,

    I would recommend customer to check their power supply and see any unexpected large input instantaneous voltage could happen which exceed device ABS value. 

    Thanks!

    BRs

    Lucia

  • 0 in reply to Lucia Gao
    Expert 2925 points

    Hi Lucia

    Absolute Maximum is 18V, right?


    If the instantaneous voltage is over 18V, can the IC be damaged, so does the TVS diode help to protect it?
    I'm trying to protect it by adding a TVS diode to the set, can I know if this helps?

    Thanks

  • 0 in reply to David Kim2
    TI__Mastermind 23620 points

    Yes, it's 18V. And it can help.

    BR

    Lucia