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I have been working on this project that consists on making a somewhat portable computer... I intend on using a Raspberry Pi and an old laptop monitor to get the job done. The thing is that I bought a Xiaomi Mi Power Bank Pro 3 to power the computer (due to the pandemic I couldn't get stuff to make my own battery pack) and after some tests to power the monitor via USB-C (up to 45W output) I found out that it doesn't follow USB rules so I got no power whatsoever... The other USB-A ports don't supply enough energy for the backlight to lit up. Is there anyway I can pull the advertised 45 watts out of the USB-C?

Controller Board

Power Bank

Desired Effect

Please ask me anything that might help you helping me. Thanks a lot.

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    What's not following the rules? Are you aware that to get 45 watts the charger and device need to negotiate a 45 watt connection?
    – davidgo
    Commented May 29, 2020 at 22:27
  • @davidgo no, I was not aware of that. I thought it would be as easy as connecting the VCC and the GND. Is there anyway I could deliver the required amount of power to the display controller board using this very powerbank with some sort of power negotiacion circuit in between. Thanks! Edit: After some web surfing I found this product that might solve my problem.
    – Emanuel Sousa
    Commented May 30, 2020 at 14:44
  • See usb.org/usb-charger-pd for an overview ( or Google USB-PD)
    – davidgo
    Commented May 30, 2020 at 14:47
  • Thanks a lot @davidgo go on and answer the question so I can mark it as solved. c:
    – Emanuel Sousa
    Commented May 30, 2020 at 14:50
  • Some googlefoo found this which may be helpful - hardforum.com/threads/usb-c-pd-to-12v-dc-barrel-adapter.1976416
    – davidgo
    Commented May 30, 2020 at 14:55

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