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PMP4496: similar UFP design

Trevor Hollins
Prodigy 40 points
Part Number: PMP4496
Other Parts Discussed in Thread: BQ25890, TUSB321, TPS65982, , TUSB320, BQ25703A, PMP40294

What power source was used to test this circuit out when charging the power bank?

I have an Anker PowerPort+ 5 USB-C feeding my BQ25890 charger with TUSB321 requesting 3A and the USB through a DSEL controlled switch.

I get the 3A but no voltage greater than 5V.

I suspect that the D+/D- link in the Anker is fouling the D+/D- handshake for the voltage.

Does this mean I have to use a TPS65982 instead of the TUSB321, or is there a power source that will work?

I note that the USB switch is controlled by the microcontroller in PMP4496 and not DSEL...?

  • 0
    TI__Prodigy 605 points

    Hi

    Any USB type C adaptor or legacy adaptor with A -C cable can be used to charge this design.

    However, please note that the TUSB320 used in this design only supports non-PD charging protocol which means only 5V3A will be allowed. Any >5V VBus request should be implemented via the CC of type C which is not supported by TUSB320. Even the D+D- can negotiate a >5V VBus, it is not acceptable per type C spec Rev. 1.2. So we don’t enable the HVDCP function of bq2589X in this design. But if you would like to have the HVDCP supported, modifying the FW can enable it.

    The USB switch is used to switch the D+D- for different role of the type C port since it is DRP role in this design.

  • 0 in reply to Yingyang Ou
    Prodigy 40 points

    Thanks for that  fast response.

    I don't have a microcontroller to change the FW of course, I have DSEL from the charger.

    Am I correct in asserting that the easiest/cheapest route to HVDCP is with a TPS6598x then, programming the appropriate power contracts suitable for our specific charger?

    I just spotted another limitation in the BQ25890 datasheet though - HVDCP halves the input current to 1.5A.

    To increase the power I would need to achieve more than 2 x 5V voltage input and the Anker supply only supports 9V and 15V!

    What a minefield.

    How long before TI produce a charger with CC control built-in, supporting the full range of PD to 20V..?

  • 0 in reply to Trevor Hollins
    TI__Prodigy 605 points

    Well, if you seek a UFP solution to support USB PD >5V3A, we will need a PD controller and a charger for this.

    For PD controller, you are right. Tps6598X should be the easiest way since you don’t need any FW effort.

    For the charger, you may consider Bq25703A which can support up to 20V input. It has similar configuration method as bq25890. And we also have such reference design such as PMP40294.