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How is the power distributed?

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3 comments

  • Michael Bitler

    Will you implement charging profile updates that we can flash ourselves>?

    6
  • Arian

    I noticed something completely different when I use my charger I bought 7/23/2020 directly from hypershop.

    I have an Apple Watch 6 (USB A), Apple iPhone 11 Pro and a MacBook Pro (13-inch, 2020, Four Thunderbolt 3 ports.
     
    Each of my devices are about 30-40% to see if the Hyper Juice charger would do the best correct Watts. Each of these cables are Apple original directly from the store to make sure the cables aren't an issue.
     
    When I plug my MBP to the top C1 first, and my iPhone to C2 second, and then plug in my Apple Watch to A1. I get the following charge Watts:
     
    C1 MBP: 30 Watts
    C2 iPhone: 27 Watts
    A1 Apple Watch: ? (don't know how to check)
     
    However, I've figured out if I plug my MBP to C2 first, then iPhone to C1 second, and Apple Watch to A1. I get the following charge Watts:
     
    C1 iPhone: 27 Watts
    C2 MBP: 45 Watts
    A1 Apple Watch: ? (don't know how to check)
     
    Once the iPhone goes past 80%, the charging reduces to lower rate (as expected). I expect that my MBP would be able to utilize the unused Wattage, but my MBP is still at 45 Watts. I have to unplug all 3 devices, wait a few seconds and replug it in (and make sure to plug the MBP in C2 first) for it to utilized the unused watts. Then it'll go up to 65 Watts, but sometimes it'll get stuck at 45 Watts again. And if you plug it in incorrectly (in wrong order or wrong slot), it'll be stuck at 30 Watts.
     
     
    C1 MBP: 30 Watts
    C2 iPhone: 15 Watts
    A1 Apple Watch: ? (don't know how to check)
     
    or
     
    C1 iPhone: 15 Watts
    C2 MBP: 45 Watts
    A1 Apple Watch: ? (don't know how to check)
     
    or
     
    C1 iPhone: 15 Watts
    C2 MBP: 65 Watts
    A1 Apple Watch: ? (don't know how to check)
     
     
    Also it should be noted if the MBP is the only thing plugged in the charger will correctly assign 100 Watts to it. 
     
    C1: MBP 100 Watts
    C2: 
     
    C1:
    C2: MBP 100 Watts
     
    BUTTT as soon as you plug in another cable (not just device), like a USB C to Lightning cable that leads to nothing on the other end, the MBP will drop to 65 Watts, like so if it's in C1
     
    C1: MBP 65 Watts
    C2: USB C cable plugged into nothing
     
    But if it's in C2, it'll stay at 100 Watts:
     
    C1: USB C cable plugged into nothing
    C2: MBP 100 Watts
     
    So I guess I can't leave the cable in C1 while my device is in C2, or it'll decrease the Watts
    0
  • Mark B.

    Hello,

    I believe the charts show the max possible in ideal conditions.

    Your MBP will negotiate 20v x 5amp or 100w when plugged in by itself. When connecting an iPhone 11 Pro, it can charge at around 22.5w. To reach this, it probably negotiates PD at 9v x 3Amps (27w) or in some cases 15v x 2amps or 30w.

    Plugging the Apple Watch charger in will reserve 12W on USB-A (5v x 2.4amp) but in reality the Apple Watch 5/6 charges using less than 2w.

    Also as you have discovered, just plugging a lightning or other Apple cable will cause the ports to be active; at a minimum of legacy USB power charging standards. This is because the cables have chips inside them for security and authentication that pull a very small current even when no phone or watch is connected.

    The charger is not allocating specific wattage to each device but instead is allocating max power available to each port, even if the device doesn’t use it or wants more than it can give.

    With the watch port reserving 12w, iPhone reserving 27w, you have 39w used; 61w remaining. Since the chargers next available power profile at 65w can’t be reached, it steps down to 45w (15v x 3amp).

    Finally, the devices may not want to use the fastest charging for heat or battery longevity reasons. They also may not update their profiles while in use to prevent random temporary shut offs. At this time in the technology, you will have to unplug lighting/watch/wireless chargers when not in use or reply them to renegotiate new power policies.

    0

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