6 ms·

Thanks, I'm getting a great understanding of all of this from the comments here. I suspect that USB is going to end up being the universal low-voltage power sou

Thanks, I'm getting a great understanding of all of this from the comments here. I suspect that USB is going to end up being the universal low-voltage power source, but I still think that's a shame, as something more like 24 to 48V would be better, especially if there was a well designed, universal connector. I'm still amazed that they can get 100W out of those tiny USB wires...

wlesieutre 12y ago
The 100W delivery over USB actually bumps it up to 5 amps at 20V. The higher power profiles aren't available by default until the devices negotiate the higher voltage and confirm that the cable can support it. With how much USB cables get beat up, staying on the lower end of voltage is probably a good idea. I've definitely seen some old ones that ended up with wires exposed. But 20V is definitely more capable than the old 5V. You'd need a lot of copper to run 100W at 5V. More info: http://www.usb.org/developers/powerdelivery/PD_1.0_Introduction.pdf http://www.usb.org/developers/powerdelivery/PD_1.0_Introduct...