Konig 1A+2.4A CS34UW001BL

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Official specifications:

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The box contains the charger and a multi language and multi device instruction/data sheet without any useful information.


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Measurements


Konig%201A%2b2.4A%20CS34UW001BL%202.4A%20230V%20load%20sweep

There is no individual overload protection on the 2.4A output

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Same for the 1A output

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There is a total output limit at about 4.5A

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The adapter runs fine on both 120VAC and 230VAC.

Konig%201A%2b2.4A%20CS34UW001BL%20230V%20load%20test

There is no problem delivering rated current for one hour.
The temperature photos below are taken between 30 minutes and 60 minutes into the one hour test.

Temp3441

M1: 66,0C, M2: 55,4C, HS1: 73,7C
HS1 is the transformer

Temp3442

M1: 55,7C, M2: 53,1C, HS1: 59,3C

Temp3443

M1: 53,8C, HS1: 84,2C
Again HS1 is the transformer.

Temp3444

M1: 66,3C, HS1: 77,4C
HS1 is the rectifier diode here.

Temp3445

M1: 58,5C, M2: 48,9C, HS1: 63,2C

10ohm

Noise at 0.5A load is: 5mV rms and 70mVpp.

5ohm

Noise at 1A load is: 5mV rms and 160mVpp.

2ohm

Noise at 2.5A load is: 9mV rms and 170mVpp.

1.2ohm

Noise at 4A load is: 8mV rms and 163mVpp.





Tear down

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The charger looked easy to open: tie the bottom part in my vice and give the top part a few wacks with my mallet. It worked as expected.

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Some of the parts are hidden beneth the white stuff (It is there to keep parts fixed if the charger is dropped).
At the mains input is a fuse and a common mode coil. Part of the switcher IC can be seen beside the common mode coil.
Besides the mains transformer is an opto coupler and a safety capacitor (CY1).
The low volt side has a rectifier diode (D3) mounted on a large heatsink, an inductor between two capacitors and even a common mode coil on the output.

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From this side the fuse, the safety capacitor and the rectifier diode can be seen.

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Here the two inductors L2 and common mode coil (L3) can be seen.

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There is space for four usb outputs, but the total current is a bit weak for four outputs.

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The common mode coil on the mains side can be seen here.

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The bottom has a bridge rectifier at the mains input. The paper isolation between mains and low volt side can be seen in on of the slots in the circuit board.
The voltage reference is U3. There is one IC for automatic usb coding (U5).

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Due to the slot in the circuit board it only need 4mm safety distance and that is fulfilled.

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



Conclusion

The charger can supply the rated current without problems, has auto coding on the 2.4A port and DCP coding on the 1A port, is safe and has fairly low noise.
This makes it a good charger.


Notes

Charger was supplied by Pro backup (probackup.nl)

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