The spec is not that bad and does converge the solution to one standard that supports a very wide range of devices. This is good. The actual connectorization is better than USB A, or especially microUSB. It is in a different league than the barrel connector era where every supply was different in size, voltage and polarity. It is nice to be able to travel with a laptop, tablet, phone, wireless headset, wireless mouse, all charged by one compact source and one cable.Mobile phones needing more than 5W to charge typically request higher voltages using PD over USB-C to do so.
In my opinion it's weirdly dangerous, but I didn't engineer the specifications.
However, some sources that claim to be USB-PD are not and do non spec compliant things. This ranges from annoying to very bad depending on what they do and what sink you have.
I have always been concerned about the no name multiport sources as I don't really trust them to supply vSafe5V to a dumb sink, once a high voltage mode is negotiated on one of the other ports.
Statistics: Posted by bjtheone — Fri Apr 26, 2024 2:20 pm