Ugreen Power Adapter CD101

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Official specifications: I got it from a Aliexpress dealer: : Ugreen Official Store


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The charger arrived in a white cardboard box with a few specifications on the outside.

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The box contained the charger and a instruction sheet.

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The button is a power switch for the charger.

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The charger has space for one phone.



Measurements

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The output can deliver more than 4A, it is a bit much for a 1A output.

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it is the same with the other 1A output

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And the 2.1A output.

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With all output in parallel I can draw about 5A at 120VAC

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And 5.5A at 230VAC.

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The charger has no problem delivering 4A for one hour.
The temperature photos below are taken between 30 minutes and 60 minutes into the one hour test.

Temp5227
M1: 60.2C, M2: 39.2C, HS1: 66.1C

Temp5228

M1: 49.8C, HS1: 64.5C


Temp5229

M1: 37.6C, HS1: 65.1C


Temp5230

M1: 63.6C, HS1: 65.7C

Temp5231
M1: 55.5C, HS1: 59.8C

Temp5232

M1: 50.7C, HS1: 66.5C

10ohm

Noise at 0.5A load is: 14mV rms and 388mVpp.

5ohm

Noise at 1A load is: 17mV rms and 353mVpp.

2ohm

Noise at 2.5A load is: 28mV rms and 264mVpp.

1ohm

Noise at 5A load is: 19mV rms and 291mVpp.




Tear down

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There where 4 screws hidden under the rubber feet, but I could not remove the bottom, even after removing the screws.

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That was because I had to remove the top.

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Some more screws and I could remove the two circuit boards.

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At the mains input is the a fuse (F1) , a , a inrush current limiter (RT1) and a common mode coil (LF1). Besides the transformer is the switching transistor (Q1) and the safety capacitor (Blue). The LED is powered from the mains side, this is a bit uncommon.
On the low volt side is the rectifier diode on a heatsink, there are two wires to the usb circuit board.

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On this side is the bridge rectifier (BD1) and the switcher controller (U1). the feedback with the optocoupler (U2) and the reference (U3).
On the usb board is the 3 auto coding chips (U5, U6, U7).

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Here Ugreen has made a mistake on the circuit board, the slot is too short. The distance from C1 to the low volt side is only about 5mm, that is more than enough if there is a slot, but without a slot it is too short!


Testing with 2830 volt and 4242 volt between mains and low volt side, did not show any safety problems.



Conclusion

This charger is fairly low on power for a 3 plug charger, the marking on it also shows that. It works fine for charging one high power device and two low power devices and the stand for one phone may be practical. The auto coding is fine and the power switch is a nice feature. Safety looks acceptable.



Notes

Index of all tested USB power supplies/chargers
Read more about how I test USB power supplies/charger
How does a usb charger work?