nobby42 wrote:
I use a power supply 5V/4A for the NanoPi M4v2 who was connect on GPIO1 pin 4/6. The PS has 5,35V (with a SSD on USB and NMVe between 5,1V and 5,3V . How much is the maximum voltage for VDD_5V?
Regards Norbert
You would need to look at the schematic design to see what uses 5V and check the parts datasheet. Mostly the 5V is for USB power and if you have ever checked any PC, this can vary up to 5.3V at times.
The issue is the lower limit. After having tested a number fo 5V 4A and 5A power supplies many failed to supply anything better than half their rating before the 5V rail dropped right now. Here is a test I did with some DC-DC modues. I did the same with an AC-DC rated for 5A and it dropped to 4.3V at just 2 amps. I didn't record that though.
http://embeddedcomputer.co.uk/2018/09/1 ... e-testing/