Troubleshooting • Strange behaviour from 27W USB-C PSU

Hi,

Can someone smarter than myself explain why the 27W USB-C PSU will power a Pi5 when directly connected, but not anything else e.g.

1. Connect via the USB splitter - no output
2. Connect to a USB-C test device - no output
3. Connect direct to Pi 5, and it works again.

Note that if I use an alternate 25W USB-C power supply, everything is fine: Pi 5, Pi 5 + splitter, Pi 5 + USB-C tester + splitter - all no issue.

So why does the Raspberry Pi 27W USB-C PSU only work when plugged *only* into a Pi 5? What is the USB logic here?

Regards, Realcodfish

Statistics: Posted by realcodfish — Sun Mar 24, 2024 8:16 pm

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