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EverythingIsBetterOutdoors
94
Jul 31, 2017
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I've noticed that a lot of these devices will support 2.4 A on multiple ports, but never have enough total output to support it on all the ports at once, although I could be misunderstanding the spec's. Do anyone have any idea why this would be ? The last thing I need in my life is more details to track like which ports support which .. I would love to just have a charger that no matter how much I plug into or where it will automatically provide the maximum fastest charge.
Sythrix
302
Sep 19, 2017
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EverythingIsBetterOutdoorsThis has the power for 4 at 2.4A. 55W total output capability, but you need to understand how and what the limitations are.
Watts = Amps (A) x Voltage(V). USB is always 5V unless you use quick charge.
The top two ports have the ability to output 2.4A at 5V if that's what your device needs... or 12W total power. However they can also output more at higher voltages, like 9V x 1.8A = 16.2W. This is for quick charge devices.
The two tablet ports are limited to 2.4A 5V output and therefore will only consume 12W each, so you could power 4 devices at 12 W if you wanted. But the two ports below those are only rated at 1A.
1A x 5V = 5W. So these will not charge at the same speed by design. If you did populate all the ports there would be slight throttling, as the device is not capable of outputting more than 55 Watts, but is also constrained by its other specs, like 10A draw max.
If we consider just the top 4 though, 12W X 4 ports = 48W total. Also, if we're worried about amps, 4 X 2.4A = 9.6A draw so you're good there... but if you just had to add in the slower 2 x 1A 5V ports (5W), you would go over on both watts (58W) and on amperage (11.6A). In that scenario, throttling would occur.
The good news is that because of the variance in cables and device needs (they won't draw more than their spec is rated for) you'll probably never be able to actually use all that wattage, barring perhaps several high voltage QC devices on the top two ports instead of the 2.4A ones (in our example) along with everything else.
Watts = Amps (A) x Voltage(V). USB is always 5V unless you use quick charge.
The top two ports have the ability to output 2.4A at 5V if that's what your device needs... or 12W total power. However they can also output more at higher voltages, like 9V x 1.8A = 16.2W. This is for quick charge devices.
The two tablet ports are limited to 2.4A 5V output and therefore will only consume 12W each, so you could power 4 devices at 12 W if you wanted. But the two ports below those are only rated at 1A.
1A x 5V = 5W. So these will not charge at the same speed by design. If you did populate all the ports there would be slight throttling, as the device is not capable of outputting more than 55 Watts, but is also constrained by its other specs, like 10A draw max.
If we consider just the top 4 though, 12W X 4 ports = 48W total. Also, if we're worried about amps, 4 X 2.4A = 9.6A draw so you're good there... but if you just had to add in the slower 2 x 1A 5V ports (5W), you would go over on both watts (58W) and on amperage (11.6A). In that scenario, throttling would occur.
The good news is that because of the variance in cables and device needs (they won't draw more than their spec is rated for) you'll probably never be able to actually use all that wattage, barring perhaps several high voltage QC devices on the top two ports instead of the 2.4A ones (in our example) along with everything else.
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