Fonken QC3 TPA-67120150VU

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Official specifications: I got it from a Aliexpress dealer: FONKEN Store with the help of a reader

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I got it in a cardboard box.

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With a instruction sheet included.

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Measurements

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It can deliver about 3.3A before the overload protection kicks in. The output voltage will increase slightly with increasing load to compensate for cable looses (Very nice).

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It works the same way at 230VAC

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At 9V it can deliver a bit above 2A, before it drops to 5V (It drops shortly to 0V).

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And at 12V the limit is a bit above 1.5A, both for 120VAC and 230VAC (It drops shortly to 0V).

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Running at 12V 1.5A for one hour is not a problem.
The temperature photos below are taken between 30 minutes and 60 minutes into the one hour test.

Temp4954

M1: 61,2C, M2: 46,7C, HS1: 66,7C
HS1 is the transformer.

Temp4955

M1: 58,7C, M2: 46,5C, HS1: 61,6C

Temp4956

HS1: 70,2C

Temp4957

M1: 56,0C, HS1: 56,6C

Temp4958

M1: 46,9C, M2: 60,9C, HS1: 64,8C

10ohm

At 0.5A the noise is 13mV rms and 264mVpp

5ohm

At 1A the noise is 15mV rms and 230mVpp

2ohm

At 2.5A the noise is 16mV rms and 244mVpp


10ohmQC9V

At 0.9A the noise is 15mV rms and 299mVpp.

10ohmQC12V

At 1.2A the noise is 77mV rms and 587mVpp



Tear down

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Pressing the sides a bit with my vice made the lid fly away.

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At the mains input is a fuse (F1) and a inrush current limiter (RT1). Between the two mains smoothing capacitors is a inductor (L1).
The opto isolator and safety capacitor is partly besides the transformer.

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The opto isolator is on this side.

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At the mains input the fuse and inrush current limiter can be seen.

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On this side is the inductor and safety capacitor.

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On this side the mains switcher (U1) and switcher transistor (Q1) is placed. The low volt side has a synchronous rectifier (U3+Q4) and the QC controller (U4).

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The isolation distance is good.


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



Conclusion

The charger can deliver lots of current with fairly low noise, coding works for QC and for devices that can use standard usb coding. I did not see any safety problems.

I will rate it as a good charger.


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?