Is there also a header on the Rock Pi 4 where we can connect a LiPo battery? The Rock Pi 4 already supports QC 3.0 (Quick Charging). If the board could be fully powered with a Li-Po battery there is no need for an UPS. Or you could use Rock Pi 4 as a portable.
LiPo battery connector
Erm, you can use power bank with QC3.0 (that’s exactly what i do)
Can the supply voltage be unregulated and float between 5VDC and 12VDC? Doesn’t the Rock Pi auto-switch between 5,9,&12 VDC and have its own internal voltage regulation?
Also saw something about QC needing two way USB-C communication?
Thanks for the info.
As far as i remember you can supply this via GPIO as far as i remember
Can the supply voltage be unregulated and float between 5VDC and 12VDC?
Yes, you can. 5V is not recommended. Some dummy 9V or 12V adapter will work.
Doesn’t the Rock Pi auto-switch between 5,9,&12 VDC and have its own internal voltage regulation?
For QC, currently we select 9V because it’s the most common. For PD, we request 20V first, if not then 15V, then 12V, then 9V.
Also saw something about QC needing two way USB-C communication?
QC use D+/D- for communication. So the usb-c cable must have data wires.
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What is the best input voltage in the range between 5 and 20 V to have maximum power conversion (inside Rock Pi 4) efficency?
According to the nb679gd datasheet, the lower input voltage, the higher efficiency. The VIN must > 5.5V.
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