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I am interested in using Power Banks to get a 12V constant power supply. From the USB-C Specification, I get this figure which shows that it is impossible to get 15 V with insufficient sink current.

I assume that the only way is to implement a Buck/Boost 5..20V -> 12V with an MCU that does the PD negotiation. It that correct?

enter image description here

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  • \$\begingroup\$ It depends on what version of the standard the power bank complied to. See electronics.stackexchange.com/a/446910/112028 \$\endgroup\$
    – Linkyyy
    Commented Jun 18, 2022 at 15:46
  • \$\begingroup\$ "it is impossible to get 15 V with insufficient sink current" - do you mean that you have to sink a minimum amount of current to get 15V? I don't think, that's what the diagram says. I'm pretty certain, it shows the maximum current/power you can sink in the individual voltage levels. \$\endgroup\$
    – Sim Son
    Commented Jun 19, 2022 at 20:27

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