Because of the holidays, TI E2E™ design support forum responses will be delayed from Dec. 25 through Jan. 2. Thank you for your patience.

  • State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 46 subscribers
  • Views 341 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.

AMC7834EVM: Confirm if it is okay to use AMC7834EVM without SDM-USB-DIG board

Jonathan Geronga
Expert 7930 points
Part Number: AMC7834EVM

Hi Team,

Our customer would like to confirm if it is okay to use AMC7834EVM  and external power supply (24V) without plugging in the SDM-USB-DIG board?

Will AMC7834EVM  still work? In this set up using only AMC7834EVM  and external power supply, the customer is not getting D2 or D3 LEDs indicating 5v power and no reading in EN pin.

Please let me know your inputs.

Thanks,

Jonathan 

  • 0
    TI__Guru 53573 points

    Hi Jonathan,

    You can, but you must ensure that VDUT is still being supplied.  When we created the board, we felt that if a customer was using an external digital controller, they would not be using the onboard power.  

    The LDOs are not enabled until VDUT (SDM-USB-DIG's 3.3V supply) is enabled.  This can be simply resolved by connecting VDUT to IOVDD and connecting IOVDD to some external 3.3V (or IO voltage).  

    Thanks,

    Paul