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TPS25751: USBC Functional Compliance Test TD 4.5.4 DRP Connect DRP Test fail

Wei-Ting Huang
Prodigy 210 points
Part Number: TPS25751

Tool/software:

Hi Team,

I have run TPS25751 device against Ellisys "USB Explorer 350". I got fail on TD 4.5.4 DRP Connect DRP Test. And the fail reason is "PUT must source Vbus after Vbus has entered vSafe0V and before tVbusON expires".

We want to know what kind of firmware configuration will directly affect the test results of TD 4.5.4? Could you help us to pass this test?

Thanks.

  • 0
    TI__Mastermind 20727 points

    Hi Wei-Ting, 

    Thank you for reaching out!

    Could you provide more information on the DRP application? Is there a battery charger in the system?

    Which power path is used for sourcing the 5V (PP5V or PPHV)? 

    The timing requirements are specified below in the USB Type C spec:

    Best Regards, 

    Aya Khedr

  • 0 in reply to Aya Khedr
    Prodigy 210 points

    Hi Aya,

    I can provide the EEPROM binary and configuration file we currently use. They will be included in the zip file below.

    config (31).zip

    There is a battery charger in our system, and it uses PPHV for sourcing the 5V.

    If you need more information, please let me know, thank you.

  • 0 in reply to Wei-Ting Huang
    TI__Mastermind 20727 points

    Hi Wei Ting, 

    Could you also provide the Ellisys failure log? Are you able to determine the time in which the PD controller begins to source 5V? 

    Just to confirm, are they using the PD controller's I2C integrated control for the BQ?

    Best Regards, 

    Aya Khedr 

  • 0 in reply to Aya Khedr
    Prodigy 210 points

    Hi Aya,

    Ellisys failure log is attached in the below archive.

    2024-12-18 163524627 - USB Compliance Report.zip

    Aya Khedr said:
    Are you able to determine the time in which the PD controller begins to source 5V?

    We did not deliberately control the time to source 5V voltage, so we probably cannot to determine it.

    Aya Khedr said:
    Just to confirm, are they using the PD controller's I2C integrated control for the BQ?

    In some cases, the firmware does have some algorithms to control the BQ charger, such as setting the CHRG_INHIBIT bit to stop charging or obtaining the ADC value of the charging current, etc.

    I want to know if the timing of source 5V and controling BQ charger will seriously affect the TD 4.5.4 test?

    Thanks.

  • 0 in reply to Wei-Ting Huang
    TI__Mastermind 20727 points

    Hi Wei-Ting, 

    Thank you for providing the logs. I will review and get back to you with feedback by Friday. 

    Best Regards, 

    Aya Khedr