Hello,
I am facing this nuisance with a DIY PSU.
The source is a 14.8 V / 10 A PSU + adjustable 40~3 V / 30 A buck converter set to 5.18 V + PD USB-C cable taken from a 90 W USB-C PD PSU.
RPI5 8GB + Pimoroni NVME board + Samsung 970 EVO SSD.
I (randomly) get this warning after boot though the load is not that high. Restarting the PI and the warning disappears, even if I add some extra USB device.
In my testings, I could power a 5 V / 6 A motor for more than 30 minutes with no noticeable heating.
My question : is the warning due to the fact that the CC wire is not connected ? Would adding the 5.1k pull-down resistor between the CC wire and ground solve this ? I could not understand if it is used for the PSU to know what it has to deliver to the device, or if it makes the device know the PSU is good for it. I'm a little confused. I couldn't understand how it actually works.
Rgrds,
I am facing this nuisance with a DIY PSU.
The source is a 14.8 V / 10 A PSU + adjustable 40~3 V / 30 A buck converter set to 5.18 V + PD USB-C cable taken from a 90 W USB-C PD PSU.
RPI5 8GB + Pimoroni NVME board + Samsung 970 EVO SSD.
I (randomly) get this warning after boot though the load is not that high. Restarting the PI and the warning disappears, even if I add some extra USB device.
In my testings, I could power a 5 V / 6 A motor for more than 30 minutes with no noticeable heating.
My question : is the warning due to the fact that the CC wire is not connected ? Would adding the 5.1k pull-down resistor between the CC wire and ground solve this ? I could not understand if it is used for the PSU to know what it has to deliver to the device, or if it makes the device know the PSU is good for it. I'm a little confused. I couldn't understand how it actually works.
Rgrds,
Statistics: Posted by FalCT60 — Fri Feb 07, 2025 6:14 pm — Replies 2 — Views 77