UGreen USB-C PD 30W CD127

DSC_9435

Official specifications: I got it from aliexpress dealer: Ugreen Official Store

DSC_9363 DSC_9364 DSC_9365 DSC_9366

The charger was in a white cardboard box

DSC_9434

And included a instruction sheet.

DSC_9440 DSC_9442

DSC_9441

DSC_9443

DSC_9444 DSC_9445 DSC_9446

DSC_9447




Measurements

UGreen%20USB-C%20PD%2030W%20CD127%20PD5V%20230V%20load%20sweep

The charger is rated for 3A and can deliver slightly above 3.5A on 5V, this is fine. There is cable compensation.

UGreen%20USB-C%20PD%2030W%20CD127%20PD9V%20230V%20load%20sweep

At 9V the current is also about 3.5A

UGreen%20USB-C%20PD%2030W%20CD127%20PD12V%20230V%20load%20sweep

At 12V the current is dropped to 3A and rating is 2.5A

UGreen%20USB-C%20PD%2030W%20CD127%20PD15V%20230V%20load%20sweep

At 15V the current is about 2.3A.

UGreen%20USB-C%20PD%2030W%20CD127%20PD20V%20230V%20load%20sweep

And at 20V it is about 2A

UGreen%20USB-C%20PD%2030W%20CD127%20PD12V%20120V%20load%20sweep

A test at 120VAC did not show any differences.

UGreen%20USB-C%20PD%2030W%20CD127%20PD12V%20230V%20load%20test

Running 1 hour at 12V 2.5A worked fine.
The temperature photos below are taken between 30 minutes and 60 minutes into the one hour test.

Temp5644
M1: 57.6C, M2: 44.0C, HS1: 68.8C
HS1 must be the switcher transistor

Temp5645
HS1: 62.9C
HS1 is the heatsink for the switcher transistor.

Temp5646
HS1: 65.0C
Here HS1 is the transformer.

Temp5647
HS1: 56.4C
And again HS1 is the transformer

Temp5648
M1: 62.2C, M2: 45.4C, HS1: 67.6C


10ohmPD5V

At 5V 0.5A the noise is 29mV rms and 498mVpp

5ohmPD5V

At 5V 1A the noise is 29mV rms and 467mVpp.

2ohmPD5V

At 5V 2.5A the noise is 77mV rms and 437mVpp.

10ohmPD9V

At 9V 0.9A the noise is 36mV rms and 644mVpp.

10ohmPD12V

At 12V 1.2A the noise is 39mV rms and 626mVpp.

10ohmPD15V

At 15V 1.5A the noise is 45mV rms and 640mVpp.

15ohmPD20V

At 20V 1.3A the noise is 48mV rms and 684mVpp.



Tear down

DSC_0135

The charger was glued together very well and I had to cut it open.

DSC_0136

At the input is a fuse and a common mode coil, the bridge rectifier is on this side next to the transformer. There is a inductor (L1) between two of the smoothing capacitors. The switcher transistor is mounted on a small heatsink.
The transformer has two parallel secondary windings going out at the top and down to the circuit board, this secures good isolation to mains.
The USB-C connector is on a raiser board. Being PD with up to 20V output the output capacitor is rated for 25V.

DSC_0144

The raiser board has a couple of passive components on it. It is connected to power lines, the old usb data lines (For QC support) and the CC line (For PD support).

DSC_0139 DSC_0140

DSC_0141 DSC_0142

DSC_0137 DSC_0138

All the active parts are on this side. The mains switcher controller (U4) next to the opto-coupler (U3). On the other side of the slot is a synchronous rectifier (U2) controller and a power transistor (Q2). To switch the PD voltage on/off is another power transistor (Q1) and then there is the PD controller chip (WT6632F).

DSC_0145

With both a slot and a isolation sheet, it is only at the edge the distance can be critical and it is good enough.


The charger passed the 2830 volt and 4242 volt test, this means it is it is fairly safe.



Conclusion

The charger supports voltage from 5V to 20V with 3A and 30W output power and it can deliver rated power, this is a nice range for a PD supply. I did not see any safety problems, but the noise is a bit on the high side.

I will call it a good supply.



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?