TPS65983B: TPS65983B OCP setting issue

Gary Teng

Part Number: TPS65983B

Hi all,

My customer want to limit peak current in 20V 4.8A PDO through PPEXT channel. They set 100% peak current limit but can't pass OCP testing as below. Is there any suggestion to reduce PPEXT OCP tolerance to ... maybe 2%? Thanks for your kindly help.

Best regards,

Gary Teng

over 5 years ago

0 Adam Mc Gaffin over 5 years ago

TI__Mastermind 29995 points

Hello,

I've submitted this question to the relevant expert who will get back to you soon

0 Scott T over 5 years ago in reply to Adam Mc Gaffin

TI__Expert 4455 points

Hi Gary,

What Firmware version, GUI version, and reference design / project is this design using? What is the full TX Source Cap register setting for the 20V PDO?

Is this a Quadramax test? Do you have a scope shot of the failing test conditions?

Thanks,

Scott

0 Gary Teng over 5 years ago in reply to Scott T

Genius 5650 points

i Scott,

Provide pjt for your reference. And customer said it's tested by intel so they don't have relative waveform.

GUI 4.14

FW: v6.67

Product : Thunderbolt 3 Dock

Best regards,

Gary

0 Scott T over 5 years ago in reply to Gary Teng

TI__Expert 4455 points

HI Gary,

We are checking this issue internally because it may involve a test issue. I will also be in contact with you.

Regards,

Scott

0 Scott T over 5 years ago in reply to Scott T

TI__Expert 4455 points

Hi Gary,

Can you reply to my message regarding the impacted customer?

Thanks,

Scott

0 Scott T over 5 years ago in reply to Scott T

TI__Expert 4455 points

Hi Gary,

I am closing this thread for now. Please open a new thread if this is still an issue.

Thanks,

Scott

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TPS65983B: TPS65983B OCP setting issue