AIFFECT WHA-1U-10W

DSC_8545

Official specifications: I got it from a reader.

DSC_8502 DSC_8503 DSC_8504 DSC_8505

The charger arrived in a cardboard box with not much useful info on it. The box only contained the charger.

DSC_8546

DSC_8551

DSC_8547 DSC_8548 DSC_8549

DSC_8550 DSC_8552



Measurements

AIFFECT%20WHA-1U-10W%20230V%20load%20sweep
AIFFECT%20WHA-1U-10W%20120V%20load%20sweep

The charger can deliver slightly above 2.2A and has cable compensation.

AIFFECT%20WHA-1U-10W%20230V%20load%20test
The charger has no problem delivering 2A for one hour.
The temperature photos below are taken between 30 minutes and 60 minutes into the one hour test.

Temp5454

M1: 51.2C, HS1: 82.6C
HS1 must be the snubber network.

Temp5455

M1: 62.8C, HS1: 65.6C

Temp5456

M1: 45.2C, HS1: 56.2C

Temp5457

M1: 69.4C, M2: 43.8C, HS1: 69.7C
Here HS1 must be the transformer.

Temp5458

M1: 45.1C, HS1: 82.0C

10ohm

Noise at 0.5A load is: 25mV rms and 319mVpp.

5ohm

Noise at 1A load is: 36mV rms and 294mVpp.

2.5ohm

Noise at 2A load is: 43mV rms and 314mVpp.




Tear down

DSC_9130

Some pressure with my vice and the lid popped off.

DSC_9131

A very typical simple construction for a low power usb supply: At the input is a fusible resistor (FR1) and there is a inductor (L1) between the two smoothing capacitors. There is also a blue safety capacitor.

DSC_9133

DSC_9134 DSC_9136

DSC_9135

DSC_9132

On this side is the bridge rectifier (BD1), the mains switcher (U1), on the low volt side is a synchronous rectifier chip (U2).

DSC_9137

DSC_9138

The isolation distance is acceptable.

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



Conclusion

This is a simple charger with no auto coding, but it is coded with DCP and can deliver enough power for that coding.

As a simple charger it is good.



Notes

This charger was donated by a reader for review.

Index of all tested USB power supplies/chargers
Read more about how I test USB power supplies/charger
How does a usb charger work?