• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 34 subscribers
  • Views 489 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.

TPS65981EVM: Changing Power Source to Laptop Side instead of Dock

Jason Haedt
Expert 4900 points

Part Number: TPS65981EVM

Dear TI

I am working on an application that mimics the EVM User's guide Table 4.  The only difference in my application is power is sourced from the PC side and not the dock side.  I need to have display, USB 2.0 , and power present in this demo.   I started using the Application Customization Tool and could not find a default profile that would work for my application but was curious if you may be able to provide the file names of the examples that may work.   I need 20V to show up at the dock side when applied as shown in the picture below.  I thought this is the configuration that would work but I have not been successful in seeing 20V on the dock.

Laptop:  TPS*_DRP_HOST_STANDARD_v3_10

Dock: TPS*_URP_HOST_STANDARD_v3_10

When I load these configurations, I only see 5V on both ends of the link.  Do you have an example file that you can share with me?  

 TPS65981EVMEdit tags
  • 0
    TI__Mastermind 36756 points
    Hi Jason,

    Are you sure you have changed both the source and sink capabilities? Configuration changes must be made on both boards for this to work properly. You can also adjust the Port Control register to ensure the laptop "Initiates Swap to Source" and the dock "Process Swap to Sink"
    Let me know if this helps.

    Thank you,
    Eric