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TPS65983B: Self-powerd Thunderbolt device using TPS65983B

Janne Lesonen
Prodigy 20 points
Part Number: TPS65983B

Hi,

Is there a way to start a fresh project without loading any existing project templates (Add-in card, Apex, Bus-powered, Tahini or Tapex)? Currently We are looking a way to configure TPS65983B to work in a Thunderbolt device that has ~12Vdc internal supply, but no FETs to control input/output charging. In practice, the device would not source / provide energy towards host, neither it would consume/sink from it. Bus-powered device template would be the easiest, since we could make the negotiation where 5Vdc would be provided, even though not consumed. Apex/Tapex/Tahini are all adding either additional TPS65983B chip or FET controls due to mandatory charging option..

  • 0
    TI__Mastermind 36756 points

    Hi Janne,

    No, the TPS65983B is only supported in these thunderbolt reference designs and will not work for other applications.

    If this answers your question, PLEASE select This resolved my issue

    Thank you,
    Eric

  • 0 in reply to Eric Beljaars
    Prodigy 20 points

    Ok,

    If following Tapex creek reference design, is it possible to leave out external FETs when only PP_5V and internal switches are used, even though FW-config tool still shows the external switch timing options? Does it matter what timing option is selected? SENSEP/SENSEN (B10 & A10) are shorted and connected to VBUS. HV_GATE1 / HV_GATE2 are left floating.

    -Janne

  • 0 in reply to Janne Lesonen
    TI__Mastermind 36756 points

    Hi Janne,

    We do not support making any changes to the reference designs. This would lead to Intel TBT certifications failures. Please follow the reference design as is.

    If this answers your question, PLEASE select This resolved my issue

    Thank you,
    Eric