You are probably right about the cables. The old buck was rated up to 39V 5A and it was set to the max 5A but the cable what I used was basically one of those cheap jumper cables from regular PCs which were used for power button/reset etc. It was going from the buck to the PI. For the new setup then I will use 2x positive and 2x negative pins from the GPIOThe Pi alone won't. The 5A PSU requirement includes 1.6A for bus powered USB devices and some margin for high load and other overheads.I seriously doubt that the PI 5 even on 100% CPU load would drain 5 amps, that must be some absolute maximum value which never even reached in practice.
As for your current buck converter, what is it rated for? Your PSU might provide 6A @ 19v but if the buck converter is only rated for, say, 2A @ 5v the practical limit will be 2A. And unless you've gone for a high quality part you may find that the closer you are to the maximum current the less well regulated the voltage is.
6A @ 19v is 114W. 114W @ 5v is 22.8A.
if it were me I'd be looking to use a good quality, buck covnerter capable of providing at least 6A at 5v. That should give you some headroom to delay voltage drops. Use good quality "fat" cables too.
Sorry, I don't have recommendations for specific parts. My Pi either run on official PSUs or ATX PSUs.
Statistics: Posted by klesk — Tue Jan 16, 2024 6:11 am