TPS65987EVM: How to achieve sink operation

Expert 5815 points

Roy Chou1

Replies: 5

Views: 120

Part Number: TPS65987EVM

Team,

I have TPS65987EVM on my hand.

I could operate in source state normally, but sink state is abnormal.

Could you let me know how to operate in sink state?

Roy

• TPS65987EVM

Expert 5815 points

Roy Chou1

• Jan 3, 2021 4:09 PM
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5 Replies

• Expert 5815 points

  

  Roy Chou1

  

  • Jan 4, 2021 9:11 AM

  We faced the issue in Scenario .2  and below is our setup. Could you give us some suggestion?

  Roy

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• Expert 4525 points

  

  Michael Emanuel35

  

  • Jan 5, 2021 5:36 PM

  In reply to Roy Chou1:

  Roy,

  Please give me a few days to check into this issue with the team.

  Thanks,

  Mike Emanuel

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• Expert 4525 points

  

  Michael Emanuel35

  

  • Jan 5, 2021 9:24 PM

  In reply to Michael Emanuel35:

  Roy,

  My suggestion is to reduce the overall trace length from the DP source to DP sink. The first option for this is to shorten the cables. The second option is connect the sink by using a Type-C cable from the PC to the EVM followed by the Display Port Sink Board to the monitor.

  Thanks,

  Mike Emanuel

  Please click "Resolved" if this answered your question.

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• Expert 5815 points

  

  Roy Chou1

  

  • Jan 6, 2021 3:37 AM

  In reply to Michael Emanuel35:

  Hi Mike,

  We tried to use 2nd option, but it still couldn't work. Do we need to modify the hardware or software setting of sink operation?

  Roy

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• Expert 4525 points

  

  Michael Emanuel35

  

  • Jan 6, 2021 10:28 PM

  In reply to Roy Chou1:

  Dear Roy,

  Can you see what happens if you leave the second board in sink mode, but attach the 20 V barrel jack?

  Thanks,

  Mike Emanuel

  Please click "Resolved" if this answers your question.

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