Orico 3-port Mobile Phone Charger WHC-3U

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Official specifications: I bought it from Aliexpress store Orico Official Store

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It arrived in a cardboard box with specifications.

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The box included the charger and a instruction sheet.

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Measurements


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The first output can deliver 3.7A

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The same with another output.

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And all outputs together is also 3.7A

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At 120VAC it drops to 3.5A, this better than the rated 15 Watt

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The charger can deliver 3A for one hour.
The temperature photos below are taken between 30 minutes and 60 minutes into the one hour test.

Temp7095

M1: 65.5C, M2: 42.3C, HS1: 65.8C

Temp7096

HS1: 56.7C

Temp7097

M1: 63.8C, HS1: 69.0C

Temp7098

HS1: 68.2C

Temp7099

M1: 47.8C, HS1: 64.7C


10ohm

At 0.5A the noise is 7mV rms and 339mVpp.

5ohm

At 1A the noise is 10mV rms and 330mVpp.

2ohm

At 2.5A the noise is 22mV rms and 362mVpp, generally the noise is low.



Tear down

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As usually with this design I could mount the base in my vice and break the top off to open it.

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On this side is the input fuse (F1: 2A), two mains smoothing capacitors (EC1 & EC2) with a inductor between (L1). The safety capacitor (CY1) is mounted close to the USB connectors. There is a large switching transistor (Q1). On the low volt side is also two smoothing capacitors (EC4 & EC5) with a inductor between. Both inductors are glued to a nearby capacitor to make it more stable if the charger is dropped.

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The mains switcher (U1) is a rather small chip. On the low volt side is the synchronous rectifier (U2: Marked OSC7710) and two auto coding chips (U3 & U4)

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The distance between mains and low volt side is well above 6mm.


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



Conclusion

The charger is nicely designed with low noise, good safety and auto coding. Only problem is that is has 3 USB outputs, but not much more power than one output can use.



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?