I like Power Delivery alot. This Panasonic x86 Tablet uses a 16V DC barrel jack plug, but it also works with 15V DC from a USB Power Brick! 馃殌
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@christian Agreed, PD was one of the most useful updates to the USB standard IMHO. I'm still looking at how to produce a variable +/- supply from one though.
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@ChuckMcManis You mean PPS? Great Video from GreatScott: https://www.youtube.com/watch?v=kcmpGbR6xZc
USB-C Just got Even Better! (PPS)
YouTube
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@christian Nope, I'd like to generate +/- "v" from the source. So for example +15V in => + and - 10V out. There are plenty of circuits that will invert a positive voltage, but if you want to have similar impedance profiles on both the positive and negative side you need to get a bit fancier.
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@ChuckMcManis In another answer I mentioned that a bigger Panasonic caused magic smoke on the wireing, probably because I chose too thin wires. A PD power source is ampere limited, right?
When I connected it, the voltage dropped from 15.1 to 13.1.
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@christian
In my experience, no, there really aren't current "limits" other than the failure of components in the circuit. I had a laptop cause a GaN charger to melt because it asked for 100W and the Charger said "Okay!" but it really couldn't do more than 65W. But it gave its life trying! So there is that. My guess is that the manufacturer used the same firmware they used for their 140W charger in the smaller one.
That said, a simple crowbar or a self resetting fuse can mange this.