• State TI Thinks Resolved
  • Locked Locked
  • Replies 5 replies
  • Answers 1 answer
  • Subscribers 64 subscribers
  • Views 1027 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Original question:

LM5060: issue with Gate pin of LM5060

LM5060: LM5060 Gate Pin Issue

Skate Lu
Intellectual 870 points
Part Number: LM5060

I saw similar questions at E2E, but found no solution.I have the same problem now. Here is my schematic

NG Waveform figure

OK  Waveform figure

I have tested my MOS FET and confirmed that it is good.

I replaced the LM5060 with a new LM5060, and the circuit can work normally.It seems that there is something wrong with Gate Pin. It seems that no charge pump works.

Can someone help me solve this problem?I tried to produce 100 sets and found 3pcs defective, which has been bothering me for a long time.

Thanks!

  • 0
    TI__Guru** 104991 points

    Hi Skate Lu,

    Thanks for reaching out.

    Is the failure happened during board bring up for the first time? Or after doing any specific test ?

    Please let me know if it is time0 failure or in the field?

    The internal circuit damage happens for EOS events. Do you expect them in your system ?

    What is the application use case?

    Have you used any TVS clamping diode at the input?

    Best regards,

    Rakesh

  • 0 in reply to Rakesh
    Intellectual 870 points

    Is the failure happened during board bring up for the first time? Or after doing any specific test ?

    Reply：YES.Normal power on test, and  INPUT Voltage is 20V.

    Please let me know if it is time0 failure or in the field?

    Reply: In the field.

    The internal circuit damage happens for EOS events. Do you expect them in your system ?

    Reply: No ,I don't want see it in my system.

    What is the application use case?

    Reply： Notebook.

    Have you used any TVS clamping diode at the input?

    Reply: TVS and RC be used in the input.

  • 0 in reply to Skate Lu
    TI__Guru** 104991 points

    Hi Skate Lu,

    Please share me the TVS part number.

    If you would not expect failure due to overvoltage, I suggest to submit the unit for failure analysis.

    Best regards,

    Rakesh

  • 0 in reply to Rakesh
    TI__Guru** 104991 points

    Hi Skate Lu,

    Do you have any local TI representative to submit the unit for failure analysis ?

    Best regards,

    Rakesh

  • 0 in reply to Rakesh
    Intellectual 870 points

    Hi Rakesh, Thanks a lot.

    I contact  local TI CQE to deal this issue now.