Also considering the oscilloscope traces I believe that not only was this examined only for 230V but in addition only at 50Hz.
The next photograph exhibits a counterfeit charger that burned up. The protection problems with counterfeits are not just theoretical; when many volts shorter out, the outcomes is often impressive.
Note that mainly because this charger features a high existing output, this chart has a special recent (horizontal) scale than the vast majority of charts to suit The full trace from the image. Stretch it horizontally to compare with other graphs. Samsung rectangular
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Thanks a great deal for your intriguing report! I really relished it and certainly learned a couple of points.
The output from this counterfeit charger is really a wall of noise. To be able to in good shape the waveform from the Show, I had to double the dimensions around the remaining and boost it by a factor of five on the correct, And so the yellow curve is definitely A lot worse than it appears.
Besides the one hundred twenty Hz spikes, the noise spectrum (orange) is flat and really low. The ability excellent is so great, I checked the results various occasions to make sure I was not missing something. Samsung rectangular
A person appealing design feature may be the filter capacitors fit through the Reduce-out holes within the secondary circuit board, permitting the massive filter capacitors to suit while in the charger. A lot more comments on this short article are at Hacker News and reddit. Many thanks for checking out!
(The gaps from the vertical line are merely measurement artifacts.) Take note that the utmost existing output of this charger is quite reduced (as advertised). Conclusions
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This is a very instructive post. However, you cannot connect with "counterfeit charger" those you examined since none of them has faux "Apple" or "Samsung" (or even the likes) printed in them. It is possible to contact them affordable/harmful/what ever, although not counterfeit.
Discovering out of your teardown reviews and also examining When they are precisely the same by using considered one of mine apart would be reassuring. Most likely you don't mind destroying it now you have established its restrictions?
Many of us requested about cables. I found an article in which a person examined cabled. The fast summary is affordable cables have greater resistance which makes charging slower.
Cefn: I took apart my orange charger, Even though I do not know if it is similar to the ones you will be applying. Here is an inner photo and Here is the circuit board. It really is quite dodgy - there is not any isolation gap in between the first along with the secondary.