Aukey Dual usb Car Charger CC-S5

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Official specifications:
I got it from a reader

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I got this charger in a cardboard box.

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Measurements


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There is no individual overload protection on the ports, I stopped the test at 4A

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The second output looks similar.

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The overload protection kicks in at around 6.5A, but it do not shut the output off, it tries to reconnect again multiple times.

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Total current is a bit lower at 24V

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The charger needs a few mA for idle current.

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The normal usb output needs about 2.2A at 12V to supply 2x2.4A on usb output.

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And the output will be stable down to about 6 volt input.

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There was no problem running 1 hour with full load.
The temperature photos below are taken between 30 minutes and 60 minutes into the one hour test.

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M1: 54,3C, HS1: 62,6C
I had to remove the cover on my test socket before this charger would fix.

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HS1: 71,3C

10ohm

The noise at 0.5A is 5mV rms and 53mVpp

5ohm

The noise at 1A is 26mV rms and 88mVpp

2ohm

The noise at 2.5A is 4mV rms and 32mVpp.

1ohm

The noise at 5A is 5mV rms and 39mVpp.



Tear down

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Some pressure on the sides and the lid pops off.

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With the lid off everything just about fell out.

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On this side is an inductor, a diode and a fuse in the circuit board (Wiggly line)


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The inductor is made with flat copper wire (I broke the ferrite around it when I opened it).

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A side view of the flat copper windings.

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The other side is shielded.

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The shield has a heat transfer pad inside.

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On this side is the switcher and no large diode, this means it must be inside the chips with a synchronous rectification.
There is also a usb coding chip.

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There are four small leds red besides the usb connectors.

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That flat copper inductor looks nice.

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Being a 12V device there is no need to test with high voltages.



Conclusion

A very short car charger and too short for my test socket. It is good at delivering current, but is lacking individual port protection. It has auto coding and low noise.



Notes

The usb charger was supplied by a reader for a review.

Index of all tested USB power supplies/chargers
Read more about how I test USB power supplies/charger