LEORY Wall outlet

DSC_0638

Official specifications:
It is from Aliexpress dealer: Audio&Video Professional Store

DSC_0601

I got it in a envelope, it did not include any box or instruction sheets.

DSC_0602 DSC_0603

DSC_0604 DSC_0605

DSC_0606



Measurements



Wall%20outlet%20%231%20230V%20load%20sweep

The charger can deliver a bit over 4A on the output and when overloaded it do not cleanly turn off, but starts a cycle with off-on.

Wall%20outlet%20%234%20230V%20load%20sweep

The other output is the same.

Wall%20outlet%20120V%20load%20sweep

All output combines at 120VAC, the current is slightly lower at this voltage.

Wall%20outlet%20230V%20load%20sweep

All outputs combined at 230VAC, there is no individual port protection.

Wall%20outlet%20230V%20load%20test

No problems running one hour at 3.1A.
The temperature photos below are taken between 30 minutes and 60 minutes into the one hour test.

Temp4476

HS1: 127,2C
HS1 is the transformer.

Temp4477

M1: 50,7C, HS1: 110,1C
HS1 is the transformer.

Temp4478

HS1: 116,8C
Here HS1 is the two rectifier diodes, they may be able to withstand the temperature but the 105C capacitor next to them can probably not.

Temp4482

HS1: 137,3C
HS1 is the transformer.

Temp4481

M1: 61,8C, M2: 52,7C, HS1: 70,4C
The front is fairly warm.

10ohm

At 0.5A the noise is 26mV rms and 997mVpp.

5ohm

At 1A the noise is 30mV rms and 843mVpp.

2ohm

At 2.5A the noise is 49mV rms and 803mVpp.




Tear down

DSC_0639

The protection plate was easy to unclip and the circuit board just needed removal of two screws.

DSC_0641

There is a glass fuse (F1) at the mains input, the switcher chip (U1:DK3124) is placed next to the safety capacitor (CY1). There is optical feedback (U2) and two rectifier diodes in parallel in the upper right corner.

DSC_0643 DSC_0644

The first image has the fuse in front, on the other image it is the safety capacitor.

DSC_0645 DSC_0647

The first image has the two rectifier diodes in front.

DSC_0642

On this side of the circuit board is the bridge rectifier (BD1) and the transformer. There is also a reference chip (U3:431).

DSC_0648 DSC_0649


DSC_0640 DSC_0651

Safety is very bad on this, put wire with a long stripped part into the terminal and it may short directly to the usb shield. Safety distances is also non-existing, I believe it is about 1.5mm, instead of 6mm.

Testing with 2830 volt passed but 4242 volt between mains and low volt side failed.



Conclusion

It gets rather hot, even when tested in free air and it has very bad safety.

There is only one thing to say: Stay away from 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?