We sell a lot of power supplies. We don't need to promote sales. We wanted a standards-compliant power supply. USB PD is the appropriate standard. Hence we made a USB PD-compliant power supply. Maybe a non-PD device would have simplified the design, both of the Pi and the PS, which would have made both cheaper. We would have made more money! But we went with a standard instead, because standards are there for a reason.A standard 5V/5A non-PD brick would have actually simplified the design. The cynical me thinks the oddball PD profile choice was actually intended to promote the sale of Pi branded supplies. I can think of no other good justification.No, to avoid the power losses involved in reducing the voltage to a level the board actually uses. Those losses add complexity, cost, and thermal load.Again weird design choice not to take higher standard PD voltages
One side effect is that the Pi PS can actually be used for other things, and at a very good price.
Statistics: Posted by jamesh — Wed Mar 06, 2024 3:36 pm