Don’t quite get what you mean by power delivery and power output. Are they not the same. Confused.
If you want say 18 - 20V input and several outputs what would be wrong with several adjustable buck converters. You would have to make sure they will supply the current you want and just as important the parent supply will have to supply enough at any one time.
The total load cannot exceed the maximum power (Watts) that the parent supply can deliver. Don’t forget to factor in conversion efficiency which could be in the region of 85%.
Thanks for that. Explains (or confuses) a lot.
But you will have to excuse my age. Back in the day PD used to be “Potential Difference” expressed in Volts or EMF (Electromotive Force) so you can understand my confusion with PD and power output.
Actually in my case I am not as I have never had any reason to look. All I knew was that if I connected my Samsung (pretty basic) phone to a Samsung charger the charging time is shorter due to some sort of communication ability. That is all I have had to know about it so today I have learned something new. Always try to do that.
How did you come across that. Looks like exactly what Dara wants and I can now understand a bit more about the initial request.
I googled for “USB Power Delivery Control Module”.
It looks like there are SOC chips that must be inside these latest generation usb chargers.
There is a lot more going on inside that you would expect.
You should look at the datasheets.
Very impressive, the ocky-strap holding in a Ryobi battery is gold.
Yes USB-PD in particular is a fairly complex standard that actually performs bidirectional communication between the charger and device, you can basically “ask” the charger how much power to provide (fantastic for minimizing E-Waste due to reducing the number of incompatible chargers out there).
It also allows for bidirectional power delivery, that’s part of the reason why some of the new smartphones can be used to share-charge or be used as a portable battery bank from the same port used for charging. It’s quite impressive and very new:
Yep, it still means potential difference too. Reminds me a bit of the IP problem (Internet Protocol, Ingress Protection, Intellectual Property) certainly makes working on custom networked submersible ROVs fun where all three terms can be used based on context