• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 62 subscribers
  • Views 785 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.

TPS84259 no output voltage, possible layout issue

Stephen Zerenner
Prodigy 20 points

Other Parts Discussed in Thread: TPS84259

We implemented a TPS84259 on a pc board and are not getting Vout.  The Vin is +24V.  The expected Vout is -15V.  I suspect a layout problem.  We had trouble understanding and following the information in the datasheet.  Some specific questions:

Should the PH pins all be connected together?

Should the PH pins be connected to anything?

I cannot post the schematic or layout, they are proprietary information.

 

Any general information would be appreciated.  I would also appreciate contact with a TI person to discuss more details.  My contact information:

Steve Zerenner

Siemens Healthcare Diagnostics Inc

+1 302 631 0562

 

Thanks in advance

 

 

  • 0
    TI__Intellectual 1710 points
    Hi Steve,

    To answer your questions in short: Yes, all PH pins were connected internally. Nope, the PH pins should not be connected to any external component. Moreover, any "DNC" pin should be left unconnected.

    Please let me know should you have any further question. I can be reached at chung@ti.com. I can give you a call if you preferred.

    Thanks for your interests on TI part.

    Hung