Baseus Dual car charger C8-K

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Official specifications: I got it from Aliexpress dealer: BASEUS OfficialFranchised Store

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The charger arrived in a box with specifications on it.

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It included the charger and a instruction sheet.

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Measurements
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The first usb connector can deliver slightly above 3A

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The second is the same.

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When working together the total is also slight above 3A

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Voltage do not change this.

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Power loss is independent of voltage and fairly low.

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The output cannot deliver 3.1 for more than a few minutes.

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I dropped the current to 2.7A and there was no problem running for one hour.
The temperature photos below are taken between 30 minutes and 60 minutes into the one hour test.

Temp5687

M1: 49.6C, HS1: 57.4C

Temp5688

HS1: 62.2C

10ohm

At 0.5A the noise is 23mV rms and 147mVpp

5ohm

At 1A the noise is 24mV rms and 140mVpp

2ohm

At 2.5A the noise is 30mV rms and 152mVpp



Tear down

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I could remove the front from this charger and then push the electronic out.

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This side has a fuse (F1) at the input the switching IC and two smoothing capacitors (C4 & C5).

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On this side is the inductor (L1), TVS diode (D5: 6V2) across the 5V output and the auto coding chip (U2).

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There is two leds, one on each side of the circuit board, they are not visible on the photo, because they are mounted below the usb connectors.

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



Conclusion

This is a nice little adapter with enough power to charge one high power device or two device with more moderate charge requirement. The design is fairly simple, but it has what is needed, including auto coding.



Notes

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