TFP410: TFP410 output image edge jitter

Alon Chen

Part Number: TFP410

The customer is using TFP410, and some products show the image edge jitter in the following video. Please help analyze where the problem is? Please help to see if there is a problem with this schematic?

2818.HDMI.pdf

over 3 years ago

0 David (ASIC) Liu over 3 years ago

TI__Guru**** 177241 points

Hi,

What resolution are they trying to support?

Can you measure the differential output clock frequency? What frequency are you seeing?

Thanks
David

0 Alon Chen over 3 years ago in reply to David (ASIC) Liu

Intellectual 405 points

1. The resolution is 1024*600

2. The differential output clock frequency is 46Mhz.

Thanks

Alon

0 David (ASIC) Liu over 3 years ago in reply to Alon Chen

TI__Guru**** 177241 points

Alon

I don't see any issue with the schematic.

Have they tried to change the TFADJ resistor and see if helps?

Have they checking the setup/hold timing on the input side and make sure the setup/hold timing is ok and use the DK1/2/3 to adjust the de-skew?

Does this issue happen on all boards?

Thanks

David

0 Alon Chen over 3 years ago in reply to David (ASIC) Liu

Intellectual 405 points

There are 15 boards, 4 boards have this issue

0 David (ASIC) Liu over 3 years ago in reply to Alon Chen

TI__Guru**** 177241 points

Hi,

Can they double check and make sure they have sufficient solder paste to the TFP410 thermal pad? They can also try to reflow the TFP410 and see if it helps solving the issue.

If reflow the TFP410 does not help, can they swap the TFP410 between a good and a bad board to see if the issue follows the board or the unit?

Thanks

David

0 Alon Chen over 3 years ago in reply to David (ASIC) Liu

Intellectual 405 points

Hi David，

This question follows the unit.

0 David (ASIC) Liu over 3 years ago in reply to Alon Chen

TI__Guru**** 177241 points

Hi,

Can you get in touch with our local office and submit the unit for FA?

Thanks

David

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TFP410: TFP410 output image edge jitter