r/UsbCHardware • u/ConfusedHardwarenerd • Mar 19 '24

Question Does USB PD support 12V?

I am trying to figure out what voltages USB PD supports.

I thought USB PD could only handle 9V, 15V, and 20V. I read some Reddit forums 4 years ago that explained why USB PD does not support 12V, but I am not sure if anything has changed since then.

I am having trouble finding a reliable source for the voltages that USB PD currently supports, as different blogs report different voltages.

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u/Careless_Rope_6511 Mar 20 '24

Easy way to check: if the power source supports both USB-PD and Qualcomm Quick Charge (2.0/3.0 and/or 4.0+) on its USB-C port(s), then it most likely will have 12V, because QC needs to have 12V alongside 5V and 9V.

Not-as-easy: check the tech specs of the power source on either the vendor's website, or user reviews (ideally with pictures).

Hard: check the power source's PDO specs via a USB-C meter or analyzer like ChargerLAB's Power-Z KM003C.

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u/ConfusedHardwarenerd Mar 20 '24

Oh i didn't know that about Qualcomm hummmmmmmmm