TD 4.10.1 Sink Power Sub-States Test

Hi,

I recommend looking through the Lecroy trace log to understand where the error occurs. The log should match the sequence of the USB-IF spec. Des you system get power form VBUS?  

Hi Malik,

OK, I will try to see log, but I want to know, in this test, the VBUS should be 5V? I do not understand the state of Vbus.

The Vbus connect to the type C connector.

I have no idea, where could draw the current.

Jason

Hi Jason,

Is your design always acting as a DFP or is it a DRP?  

Hi Malik,

It should be DRP mode. 

Could you tell me how to check?

Jason

HI Malik,

According to my customer FW, TPS65987 act as DRP. 

And I also check the FW, my customer doesn't open the sink path, so I do not understand why the compliance report show the current > 1mA.

This is the CC log, could you give me some suggestion about how to solve this issue?


Jason

Hi Jason,

There is nothing incorrect in CC log shared. I recommend removing R880 to understand if external component have some large leakage current.

Hi Malik, 

Why you said there is nothing incorrect in CC log? the CC log said, the board draw more than 1.5 amp. do you think it is possible?

Jason

Hi Malik,

I got it, thanks.

Jason