Per the announcement news item, backfeeding is not an issue (which is to say, it's been designed correctly). I don't have an RPT USB 3 hub...yet (I have one on order as an add-on to other stuff I was getting anyway). To the best of my knowledge, it is limited to what a PSU will deliver without invoking PD, which is to say, 3A at 5v. I haven't seen anything to suggest that there is any per port division of the input power.Hi,
I'm looking for a USB3 hub with external power to connect a SSD (WDS100T3G0A, 5v1.6A) to my RPI4, an since I don´t have too many options in my country, I am looking at the original RPI USB Hub.
Is it a reliable option to connect 1 or 2 external drives?
How much power can the original RPI USB3 HUB can deliver on each usb device?
Is backfeeding an issue in this hub?
The input power is my one disappointment with the hub. USB 3 spec calls for 900mA per port. Unless one finds a PSU that will deliver more that 3A at 5v without using PD, the power input for the hub will be limited to 3A, which is an average of 750mA per port. So you could get the full rated USB 3 power, only if you limit the downstream to 3 of 4 ports. Personally, I think the RPT missed a bet (even at an increase in price) of not putting a PD "handshake" into the hub to allow it to accept the full 5A from a Pi5 PSU. Perhaps a future iteration will fix this.
Statistics: Posted by W. H. Heydt — Tue Jan 28, 2025 10:10 pm