Test/review of 5V 2A Dual USB fast charger JC-0080

1 post / 0 new
HKJ
HKJ's picture
Offline
Last seen: 1 week 3 days ago
Joined: 05/24/2011 - 12:23
Posts: 7447
Location: Copenhagen, Denmark
Test/review of 5V 2A Dual USB fast charger JC-0080

5V 2A Dual USB fast charger JC-0080
DSC_5519
Official specifications:


  • AC ADAPTER usb charger adapter
  • Input: 100-240V~50/60Hz Max0.5A
  • Output: 5.0V-2.0A iphone charger
  • Type: Power Adapter
  • Compatible Devices: Universal
  • Special Functions: Portable,USB,Rapid Charging
  • Color: Black

I got it from ebay dealer top-in-sell
DSC_5518
This charger arrived in plastic bag inside a envelope.
DSC_5520
DSC_5521 DSC_5522
DSC_5523
DSC_5524
Measurements


  • Power consumption when idle is 0.06 watt
  • Both USB outputs is coded as USB charger (DCP)
  • The two outputs are in parallel.
  • Weight: 36.0g
  • Size: 82.8 × 40.0 × 22.6 mm

5V%202A%20Dual%20USB%20fast%20charger%20JC-0080%20%231%20230V%20load%20sweep
It can deliver a bit above 2.1A on the 1A rated output
5V%202A%20Dual%20USB%20fast%20charger%20JC-0080%20%232%20230V%20load%20sweep
And the same on the 2.1A rated output.
5V%202A%20Dual%20USB%20fast%20charger%20JC-0080%20230V%20load%20sweep
Even using both outputs together is the same 2.1A, but the voltage has dropped, it looks like something inside the charger got damaged during the previous tests.
5V%202A%20Dual%20USB%20fast%20charger%20JC-0080%20120V%20load%20sweep
Current is the same at 120VAC input.
5V%202A%20Dual%20USB%20fast%20charger%20JC-0080%20230V%20load%20test
For the one hour test I used 230VAC and 2A current, the charger could handle that. This test was done after the above tests and surprisingly I got full output voltage here, but later on the output voltage is low again.
The temperature photos below are taken between 30 minutes and 60 minutes into the one hour test.
Temp6673
HS1: 64.5°C
HS1 is the transformer.
Temp6674
HS1: 72.4°C
Here HS1 is the rectifier diode.
Temp6675
HS1: 58.3°C
Temp6676
M1: 70.8°C, M2: 52.4°C, HS1: 71.5°C
Temp6677
HS1: 87.6°C
10ohm
At 0.5A the noise is 100mV rms and 864mVpp.
5ohm
At 1A the noise is 162mV rms and 1253mVpp.
2.5ohm
At 2A the noise is 184mV rms and 1138mVpp, this is high values.
Tear down
DSC_6198
Standard procedure for opening: Some pressure in my vice (This usual cracks some of the glue) and a whack with my mallet.
DSC_6199
On this side is a glass fuse (FU) at the mains input, a safety capacitor (CY) and a large diode (D3) on the low volt side.
DSC_6201
DSC_6202 DSC_6204
DSC_6203
DSC_6200
On this side is the bridge rectifier (BD1) and the mains switcher (U1: LP3783: 5V 2A).
DSC_6205
DSC_6206
It is a good idea with slots in the circuit board to improve isolation, but here it is too short and even with the slot the distance is too short at around 2.5mm
Testing with 2830 volt and 4242 volt between mains and low volt side, did not show any safety problems.
Conclusion
The charger has a lot of noise and the problem with low output voltage, this is not very good.
The isolation could handle the high voltage, but the distances are much too short and high humidity will probably spoil the isolation.
Notes
The charger was supplied 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?

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/