• State
  • Locked Locked
  • Replies 2 replies
  • Subscribers 62 subscribers
  • Views 1001 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.

UCD9248+PTD08A020W，output 1V，output is not stable

nightya
Prodigy 20 points
Other Parts Discussed in Thread: PTD08A010W, PTD08A020W, UCD9248

Hello，everyone.I use UCD9248 to control two PTD08A020W and five PTD08A010W. The PTD08A010W works very well,but the PTD08A020W works not good. I have meet some problems ，like the picture,the output is not stable:

and the PWM is:

When the PTD08A020W works, I can hear some noise, does the module broken? or other reasons, anyone can help me?

  • 0
    TI__Genius 9845 points

    The noise is from the loop instability. You will need to tune to feedback loop compensation to make it stable. 

    Connect the device to Fusion GUI, and open project file. Click Design (left side of the GUI), then you can change the compensator values.

    A guide of digital loop tuning is in Section 3.8 of below document:

    Thanks,

    Zhiyuan

  • 0 in reply to Zhiyuan Hu
    Prodigy 20 points

    Zhiyuan,

          Thanks for your answer. When I use the design GUI the output is directly shotdown.52d.pdf

    its my Schematic diagram,can you help me to configure a correct xml that I can see whats wrong with mine.

    Thanks,

    ya