TPD5S115: 7-13 Vcec test fail

Shu-Cheng LIN

Guru 11785 points

Part Number: TPD5S115

Hi Sirs,

Sorry to bother you.

We are test 7-13 Vcec will be fail, the voltage around 0.7 v (SPEC< 0.6)

We combine GND/PGND together on currently design,

So we think it cause 7-13 test item fail

Can you share your experience?

This is our EA team's report.

Vcec =0.79 V ,over spech ( use volt-ohm-milliammeter)

over 5 years ago

0 Chuck Branch over 5 years ago

TI__Mastermind 27920 points

How similar is your layout to the figure captured on section 10.2 on the datasheet?

How the grounds are routed and connected can impact noise performance, but 190mV is a large failure.

Does you system have external pull-ups or other components that could be impacting the DC level of CEC?

0 Shu-Cheng LIN over 5 years ago in reply to Chuck Branch

Guru 11785 points

Hi Chuck,
There are no other component or external pull res on CEC.
I could send our schematic and layout to you offline.
Could you accept my friendship request?

0 Chuck Branch over 5 years ago in reply to Shu-Cheng LIN

TI__Mastermind 27920 points

I have accepted, but we are not allowed to share our email or other contact information over the forum. If you would like me to review your schematic, then you will have to work through your local sales for fae support team.

The type of level shifter that is used on the CEC is passive, so there is likely something shifting the voltage outside of the TPD5S115.

0 Chuck Branch over 5 years ago in reply to Chuck Branch

TI__Mastermind 27920 points

Review completed in Private message

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TPD5S115: 7-13 Vcec test fail