• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 62 subscribers
  • Views 247 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.

UCC21540: OUTA suddenly drop but INA is stable

Roy Chou1
Genius 12595 points
Part Number: UCC21540

Hi Team,

We have an issue in UCC21540. For below picture, CH1 is OUTA CH2 is INA and we use isolated probe to measure it.

You could see the OUTA suddenly drop but INA is stable. Do you have any idea how could debug it?

Roy

  • 0
    TI__Expert 3355 points

    Hi Roy,

    Thanks for your question.

    I see some potential violation of abs. max values in the initial output undershoot which might cause poor performance. We typically recommend adding an external clamping diode if the undershoot is too bad.

    I will reach out to you over email to learn more, since I think this will require more extensive information.

    Thanks,

    John