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TPS65983B: Question on TPS65983 Thunderbolt Application Customization Tool 4.10

Alice Ng
Intellectual 330 points
Part Number: TPS65983B

Hi, 

I’m using reference design APEX Creek ATX.

1. In Transmit Source Capabilities, there is Bank 0 (manual) setting & Bank 1 (automatic) setting. What is the different between both? 

2. For Bank 1 & Bank 0, which will get the 1st priority when power deliver started? Where can I refer to get the sequence flow chart how it work for both bank?

3.  If I only have one power source (i.e. PP_HV) to deliver 5V@3A, 15W, what should be the setting for Transmit Source capability?

Looking forward to your reply.

Thank you.

  • 0
    TI__Mastermind 30000 points

    Hello Alice,

    Thank you for posting you question here on E2E. An expert covering this part will look into your question and respond shortly.

  • 0 in reply to Adam Mc Gaffin
    TI__Mastermind 36756 points

    Hi Alice,

    it is recommended to use these templates AS IS and to not make any changes. Making changes can result in issues with TBT compliance for your TBT device design. Bank 0 is used for supplying 5V on VBUS, the Bank 1 Source capabilities are selected when dynamic source policy manager is needed which is defined by Intel for TBT device designs. If you will only provide 15W, then bank 0 can be used.

    Thank you,
    Eric

  • 0 in reply to Eric Beljaars
    Intellectual 330 points

    Hi Eric,

    Thanks for the reply. I still don't understand clearly how Bank 1 & Bank 0 work together. Do you have the flow chart how both work from cable detection until power delivery start? 

    I doesn't see Bank 1 in the older customization tool (ver3.03)...

    Thank you.

    Regards,

    Alice Ng

  • 0 in reply to Alice Ng
    TI__Mastermind 36756 points

    Hi Alice,

    Unfortunately, we do not have a flow chart for this behavior. This was done to support Source Policy Manager, a requirement for TBT device designs that will source more than 15W. However, since you plan to only source 15W, this does not apply to your design.

    Thank you,
    Eric

  • 0 in reply to Eric Beljaars
    Intellectual 330 points

    Hi Eric,

    Just to confirm, the power budget (1.5W) for active cable are no need to include here right?

    Since bank 0 is recommended, what do I need to set for bank 1? I notice I not able to disable bank 1. It will be there and change according to the port power capability (the column above Bank 0).

    Thank you.

    Regards,

    Alice Ng

  • 0 in reply to Alice Ng
    TI__Mastermind 36756 points

    Hi Alice,

    The power budget for VCONN (1.5W), is not included in the Source Capabilities register.

    You can leave Bank 1 as the default setting per the TBT design template.

    Thank you,
    Eric