Not sure where to ask this but why do some wall powered usb-c hubs refuse the charge anything until they are plugged into a computer?

Comments

• lordnikon@lemmy.world ⁨6⁩ ⁨hours⁩ ago

  Becase some devices require a signal on their comm pins to negotiate the correct voltage to charge the device. Also some devices are dicks and needs a proprietary signal in order for it to charge. Looking at you sony.

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  • edgemaster72@lemmy.world ⁨6⁩ ⁨hours⁩ ago

    Sony and proprietary nonsense, name a more iconic duo

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    • sbeak@sopuli.xyz ⁨3⁩ ⁨hours⁩ ago

      Apple, Samsung, all the Chinese phone brands with their proprietary fast charging standards, HP, Bambu Lab, Nintendo, Xbox, Microsoft, Google, Adobe, etc. etc.

      There’s a lot of terrible companies, actually.

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    • Jarix@lemmy.world ⁨5⁩ ⁨hours⁩ ago

      Nintendo and it’s propriety hardware

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    • crandlecan@mander.xyz ⁨3⁩ ⁨hours⁩ ago

      Apple?

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• Kolanaki@pawb.social ⁨6⁩ ⁨hours⁩ ago

  I’m guessing the driver on the PC regulates the power somehow and not any logic on tbe hub itself.

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• j4k3@lemmy.world ⁨5⁩ ⁨hours⁩ ago

  The hub doesn’t have a negotiation chip to set the voltage correctly. It is likely presenting as a bus hub. Like if you do $ lsusb on Linux, you’ll see the hub and whatever is connected. That hub may be integrated into other chips or it may be stand alone as a peripheral somewhere on the board. It is basically like a digital capable splitter for the bus. It is only concerned with the data. The power is likely just passed through. For USB-C PD, it would need some complex additional circuitry to negotiate, convert voltages and do current limiting. The way the pins can be inverted by flipping the connector makes it logically complicated.

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