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TPS65994AE: TPS65994 highest power setting

wu jerry
Prodigy 10 points
Part Number: TPS65994AE
Other Parts Discussed in Thread: TPS65994

Tool/software:

PJT setting Multiport Sink Policy as "Highest power" and Auto Neg Capabilities Mismatch Power as "45W"

Plugging a 15W adapter into the first Type-C port without proper power delivery is a normal phenomenon.

However, when a 30W adapter(any small than45W adapto also) is then plugged into the second port, the 30W adapter starts supplying power.

which PJT configure need check or patch FW need update(TPS65994_F909.12.17 is used)

  • 0
    TI__Mastermind 33540 points

    Hi,

    One of our team member will respond to you shortly.

    Regards

  • 0 in reply to Tommy Lin
    TI__Prodigy 510 points

    Hi,

    The MultiportSinkPolicy and AutoNegCapabilityMismatch are two mutually exclusive features.

    When you have a higher power adaptor plugging into the device, "Highest Power" MultiportSinkPolicy will make the PD Controller start sinking power from the higher power adaptor regardless of the power difference between the sources at both ports.

    The Auto Neg Capabilities Mismatch Power only sets the "capability mismatch" bit, that too in the case where the current power is less than the AutoNegCapabilityMismatchPower value. This bit is then used by the source to judge whether it can offer a higher power or not, but this does not have any implication on Sink to do anything.

    For the usecase that you have explained, PD Controller will always shift to 30W source for consuming power as long as MultiportSinkPolicy is set to Highest Power

    Thanks and Regards,
    Annchit

  • 0 in reply to Annchit Bhatnagar
    Prodigy 10 points

    Hi Annchit

    thasnk your reply,

    But our current design requires "Highest Power" supply, with low power supply ranging from 45W to 100W.

    In this case, how should we configure the settings?

  • 0 in reply to wu jerry
    TI__Prodigy 510 points

    Hi,

    I'm not sure if I understand your requirement completely. With "Highest Power" configured, the PD Controller will always shift to higher power contract no matter the power supply range. So even in cases where the new higher available power is in range of 45W to 100W or even if its still less than 45W but greater than older contract, PD controller will switch the power provider port.

    If you are trying to make an implementation in a way that PD Controller Does not switch the power provider port in case the new higher available power is less than 45W, then that would not be possible to do in our current implementation of Multiport Sink Policy.

    Please explain the use case you are trying to build if the description that I have assumed does not match your requirement.

    Thanks and Regards,
    Annchit

  • 0 in reply to Annchit Bhatnagar
    Prodigy 10 points

    Hi,

    So, if our project is below config, PD can support?

    1、two port

    2、two adaptor plug need use high power sink

    3、system power need at least 45W

  • 0 in reply to wu jerry
    TI__Prodigy 510 points

    Hi,

    If we are connecting both ports to Adaptors of 15W and 30W. The device will continue to sink from only one of the adaptors which has higher power, in this case, 30W. The sink path for both the adaptors will still be in enabled state, but the lower power port will be put into reverse current protection state to prevent any damages that could occur due to combined sinking on the controller.

    So, in a 2 port system, PD can support higher power sinking by choosing which port is offering more power, but it won't combine the sinking powers from both ports together to achieve the minimum required power.

    Thanks and Regards,
    Annchit