• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 63 subscribers
  • Views 478 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

LM5085: Encountering multiple pulses in discontinuous conduction mode

Drew Doran
Prodigy 240 points
Part Number: LM5085

Hi,

One of my customers is seeing multiple pulses in discontinuous conduction mode and is not quite sure what is going on. I have attached their full question in this post.

Thank you!

Regards,LM5085 discontinuous conduction mode.docx
Drew 

  • 0
    TI__Prodigy 700 points
    Hi Drew,

    The observed behavior in light load has probably to do with the noise floor at the FB pin and the trace length / routing of the FB network and the ripple injection components.

    In the user guide of the LM5085 Evaluation board - AN-1878 www.ti.com/.../snva357b.pdf you can find a configuration for your reference. On page 12 - Figure 16 you can see the expected switch node behavior in Discontinuous Conduction Mode.

    Best Regards,
    Robert L