Orange Pi 3 Ready To Take On Raspberry Pi 3

popatim

Titan
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Seems odd to spec a 5v 3a charger when the unit has 2 usb2 ports (5v@ 0.5a each - 1a total) and 4 usb3 ports (5v@0.9a each = 3.6a total) for a total of 4.6a needed just to be able to supply the spec'd USB power.
 

shrapnel_indie

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Maybe they're not expecting someone to use all ports and draw power from them all... maybe... It would have been smart to have spec'd it for 5a instead though.
 
Jan 21, 2019
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If you were to spec the the amps of plugs of your house based on all your devices being turned on each plug would be like 30-40 amps.
 

beppomarx

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Apr 6, 2011
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I love how devices like this are 40 bucks but a phone- because it has a shell and screen runs $600. I know it's not apples to apples but I mean there has to be at LEAST 25%-50% if not more markup for these devices for the company to profit.
 

BryanFRitt

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Oct 24, 2011
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four USB 3.0 Type-A ports, one USB 2.0 port
4*(6*1.5*A=.9*A)*5*V+4*(5*.1*A=.5*A)*5*V=28*W, The add the Pi itself...
"consumers are encouraged to purchase a quality DC 5V 3A charger to power the Orange Pi 3"
5*V*3*A=15*W
[Figures are if you MAX out USB power, and are not in charging only mode]
https://en.wikipedia.org/wiki/USB#Power
You don't have to have all USB ports putting out full power at the same time. (some devices come with an wall outlet plug)
 

BryanFRitt

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Oct 24, 2011
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"Orange Pi 3 includes four USB 3.0 Type-A ports, one USB 2.0 port, and a micro-USB 2.0 OTG (On-The-Go) port with support for power input"
A USB 3 port, --> 6*.150*A*5*V = 4.5*W max power draw in non-charging only mode
A USB 2 port, --> 5*.100*A*5*V = 2.5*W max power draw in non-charging only mode
https://en.wikipedia.org/wiki/USB#Power
"consumers are encouraged to purchase a quality DC 5V 3A charger to power the Orange Pi 3"
3*A*5*V=15*W
4*4.5*W=18*W, 4 USB 3.0 at max power draw in non-charging only mode
You don't have have full power on all USB ports at the same time, and some devices come with their own DC adapter.
 
Jun 29, 2018
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The only way for this to be considered a good RPi alternative is if they have released the kernel sources and the opensourced the video driver. If not this will simply stop working when allwinner decides there isnt enough money to be made from the SoC anymore.
 
Aug 1, 2018
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"You don't have have full power on all USB ports at the same time, and some devices come with their own DC adapter."

That's not following proper design processes. You always consider the max amperage of all the inputs during your design phase and label/spec according. If it's a UL approved device you better believe they max them all out and ensure you have proper labeling and protection. Yes, this probably isn't UL approved but this is sloppy specs.
 

BryanFRitt

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Oct 24, 2011
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"That's not following proper design processes. You always consider the max amperage of all the inputs during your design phase and label/spec according. If it's a UL approved device you better believe they max them all out and ensure you have proper labeling and protection. Yes, this probably isn't UL approved but this is sloppy specs."

USB hubs have he same issue.

ops... math above had it with 4 USB 2.0 ports instead of 2 (micro + regular).
It has 4(type A) USB 3.0, 1(type A) USB 2.0, 1(Micro) USB 2.0
(4 ? (6 ? 0.15 ? ampere) ? 5 ? volt) + ((1 + 1) ? (5 ? 0.1 ? ampere) ? 5 ? volt)
= 23 W
 

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