Magcle QC3.0 usb charger QC-008

DSC_2584

Official specifications: I got it from a Aliexpress dealer: PERZEN Electronic(SHENZHEN) CO.,LTD

DSC_2583

It was in a plastic bag and shipped in a envelope. There was no manual or usb cables included.

DSC_2585

DSC_2586 DSC_2588 DSC_2589

DSC_2590 DSC_2591



Measurements

Magcle%20QC3.0%20usb%20charger%20230V%20load%20sweep

Output is rated for 3A and can deliver about 3.8A before overload protection kicks in.

Magcle%20QC3.0%20usb%20charger%209V%20230V%20load%20sweep

At 9V output it can deliver 2.5A, before getting into trouble.

Magcle%20QC3.0%20usb%20charger%2012V%20230V%20load%20sweep

At 12V output the limits is 1.8A.

Magcle%20QC3.0%20usb%20charger%20120V%20load%20sweep

At 120VAC the output is slightly less.

Magcle%20QC3.0%20usb%20charger%2012V%20120V%20load%20sweep

At 12V the output is about the same.

Magcle%20QC3.0%20usb%20charger%2012V%20230V%201.6A%20load%20test

Drawing the rated 1.6A at 12V did not work for more than about 27 minutes.

Magcle%20QC3.0%20usb%20charger%2012V%20230V%201.4A%20load%20test

Reducing the load to 1.4A and I could run for one hour.
The temperature photos below are taken between 30 minutes and 60 minutes into the one hour test.

Temp4794

M1: 65,7C, M2: 52,9C, HS1: 67,0C
HS1 is the rectifier diode and M1 is the transformer.

Temp4795

M1: 51,8C, HS1: 61,7C

Temp4796

M1: 62,9C, HS1: 72,2C
HS1 is again the transformer.

Temp4797

HS1: 69,0C

Temp4798

M1: 63,7C, HS1: 70,7C

10ohmQC5V

At 0.5A the noise is 61mV rms and 1244mVpp

5ohm

At 1A the noise is 79mV rms and 1235mVpp

2ohmQC5V

At 2.5A the noise is 96mV rms and 1253mVpp.

10ohmQC9V

At 0.9A the noise is 82mV rms and 1218mVpp.

10ohmQC12V

At 1.2A the noise is 108mV rms and 1491mVpp, the noise is very high side.



Tear down

DSC_5233

Pressing the sides a bit with my vice made it pop mostly open, a screwdriver did the rest.

DSC_5234

All the electronic is on this side of the circuit board. At the mains input is a fuse (F1) in the form of a fusible resistor, followed by a bridge rectifier (DB1). The mains switcher IC (IC1: DS3220).
There is opto feedback (IC2) and a safety capacitor (CY1).
On the low volt side there is a large rectifier diode, the code handling IC (U1: Marked PT4RUP) and the reference (Q2: 431).

DSC_5236 DSC_5237

DSC_5238 DSC_5239

Look at the transformer, the yellow tape is only at the outside and do not cover the core fully.

DSC_5235

There is nothing on this side of the circuit board.

DSC_5240

DSC_5241

But the creepage distance is too low, it must be about 6mm, but this is not enough to fail the high voltage test.

DSC_5242

I removed the safety capacitor and tested it separately, it was fine.

DSC_5243

Testing a bit more and the problem showed up, the transformer core is not isolated and it is very low safety distances, when applying high voltage there was a spark between it and the rectifier diode.

The charger passed the 2830 volt test, but failed the 4242 volt test, this makes it unfit for 230VAC mains voltage.


Conclusion

The support for more codes is fine, but the safety is not good enough on this charger and it have very high noise. I cannot recommend it.



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?