• State TI Thinks Resolved
  • Locked Locked
  • Replies 2 replies
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 119 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.

TPS23755: Flyback primary feedback AUX_D problem

Allen yang
Intellectual 930 points
Part Number: TPS23755

Tool/software:

Hi Team,

How to connect the AUX_D pin when designing a flyback primary feedback circuit using TPS23755?

  • 0
    TI__Mastermind 37121 points

    Hi Allen,

    Thanks for reaching out!

    We will look into your questions and get back to you in 3-7 business days.

    Best regards,

    Diang

  • 0 in reply to Diang Xing
    TI__Mastermind 37121 points

    Hi Allen,

    Thanks for your patience. 

    In a power oring structure, the AUX_V and AUX_D are used to lower the PoE's output voltage, to let an auxiliary power supply on the 2nd side have a higher priority than PoE. 

    If you have 2nd side adapter and want to use these two pins, you can refer TPS23755EVM (https://www.ti.com/tool/TPS23755EVM-894) schematic.

    If you do not have 2nd side adapter, you can set AUX_V and AUX-D as open. And make sure the resistance at FB is updated, e.g. R190 resistance = R190 and R188 in parallel. 

     

    Best regards,

    Diang