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constantius

Orangepi 3 h6 allwiner chip

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13 minutes ago, Flole said:

Nope, it clearly says Orange_PI-3 on it, downloaded from the Google Drive. Dated at November 26th 2018.

So, it should be the same as mine : Ok ! The block diagram is wrong, but I never care about block diagram, I care only about real schematic ... Page 8 clearly states that VCC-5V is direct from DC-IN !

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2 hours ago, Flole said:

t's indeed a little low on mine aswell

Hi. I've only had that powering with barrel jack. With microUSB it's as stable as could be. It's the world in reverse.
I expected the cables from OPi to not be good enough. I've got 2 and both are like that. I don't know.
I havent tried with a PSU with barrel jack. Don't know if I've got one.
I've showed this behaviour in my review video : https://www.youtube.com/watch?v=D2SIpXTOb9A&t=492s
 

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30 minutes ago, martinayotte said:

So, it should be the same as mine : Ok ! The block diagram is wrong, but I never care about block diagram, I care only about real schematic ... Page 8 clearly states that VCC-5V is direct from DC-IN !

Not only the block diagram is wrong but the Power Tree aswell (which is somewhat important). And Page 10 clearly says that the VCC-5V is connected to the GND Pin of the USB, which is also not correct.....  I don't really trust these schematics anymore....

 

18 minutes ago, NicoD said:

With microUSB it's as stable as could be. It's the world in reverse.
 

Just tried this aswell, and indeed it's a lot better. Weird.....

 

Anyways, there doesn't seem to be some kind of regulator involved so it's all good now!

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1 hour ago, Flole said:

And Page 10 clearly says that the VCC-5V is connected to the GND Pin of the USB

I think it is the labels of the connector that are swapped : VBUS is VCC on pin 4, and GND would be pin 1 ... ;)

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GND is actually pin 4 of a USB connector. The numbering is also not reversed cause then D+ and D- wouldn't be correct anymore. So that's just wrong in the schematics.

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With my OPi3 powered from the 'genuine' power adaptor via the power jack I'm not seeing any voltage issues.

On no load I see 5.2v at the USB sockets..

IMG_20190517_075218.jpg

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5 hours ago, GeorgeP said:

With my OPi3 powered from the 'genuine' power adaptor via the power jack I'm not seeing any voltage issues.

On no load I see 5.2v at the USB sockets..

That sais enough. They are overvolting their PSU's so it would not undervolt too quickly. I'm using a 4A 5V PSU that's 5.1V and I've got undervoltage.
And it's not no load voltage that's important. It's full load voltage.
But because doing it wrong you've proven they know about it.

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