Test/Review of Linoya A3 4 Ports 4A USB USC-001

20 posts / 0 new
Last post
HKJ
HKJ's picture
Offline
Last seen: 2 hours 29 min ago
Joined: 05/24/2011 - 12:23
Posts: 7434
Location: Copenhagen, Denmark
Test/Review of Linoya A3 4 Ports 4A USB USC-001
Linoya A3 4 Ports 4A USB USC-001

DSC_1005

Official specifications:
  • 4 USB outputs
  • 5V / 2A (Max.) charging port suitable for iPad, tablet or other high power required devices.
  • 5V / 1A charging port suitable for iPhone, cellphone and other USB powered devices.
  • LED indicator light for power status, safety and convenient.
  • Input: Wide input voltage range of AC 100-240V for use worldwide.
  • Interface: USB2.0

I got it from gearbest sku:13039901

DSC_0995

I got this charger in a cardboard box.

DSC_1004

The box only included the charger and a main lead with US plug.

DSC_1006
DSC_1007
DSC_1008 DSC_1009 DSC_1011

DSC_1010

The black border is a rubber band.



Measurements
  • Power consumption when idle is 0.19 watt
  • Outputs are in parallel.
  • 2A port is auto select up to Apple 2.5A
  • 1A port is USB power (DCP)
  • Blue led is on when usb power in on.

Linoya%20A3%20top%20load%20sweep

Linoya%20A3%20bottom%20load%20sweep

No individual overload protection on the ports, each port can deliver the full current.

Linoya%20A3%20load%20sweep

When using all outputs, the voltage drop in connections and cables are lower.

Linoya%20A3%20load%20test

No problem with full output current for one hour.
The temperature photos below are taken between 30 minutes and 60 minutes into the one hour test at 3.5A.

Temp2269

M1: 32,9°C, M2: 71,4°C, M3: 53,9°C, HS1: 75,5°C
HS1 is the transformer. I wonder what M2 is, it looks like a capacitor, but they are not supposed to get hot.

Temp2270

M1: 58,2°C, M2: 45,8°C, HS1: 62,3°C

Temp2271

M1: 53,0°C, M2: 46,3°C, HS1: 60,7°C
The heatsink on the rectifier diode spreads the heat over a big area (very good).

Temp2272

M1: 50,5°C, M2: 68,6°C, HS1: 73,3°C
HS1 must be the 0.022ohm resistor (R4), but it is only 0.35watt that is must get rid of?

10ohm

At 0.5A the noise is 23mV rms and 900mVpp, that is a lot of peak noise.

5ohm

At 2.5A the noise is 25mV rms and 800mVpp

2ohm

At 4A the noise is 17mV rms and 420mVpp, at full load the noise is a bit lower.



Tear down

DSC_1024

This time I checked under the rubber feet and found the screws.

DSC_1025

On the top side there is an input fuse, a common mode coil, the mains switcher transistor hidden under a small heatsink. There is also a safety capacitor and opto feedback with a slot in the circuit board below them.
On the low volt side there is the rectifier diode hidden below a larger heatsink and a inductor.

DSC_1027

From this side the safety capacitor can be seen.

DSC_1028 DSC_1030

On the mains side the common mode coil is visible, on the low volt side the blue led is visible.

DSC_1029

A significant part of this side is the heatsink for the rectifier diode.

DSC_1026

There is a few interesting parts here, the rectifier diode bridge (BR1), the mains switcher controller (U1).
On the low volt side there is the voltage feedback controller (U2), the resistor R4 is probably used for the over current protection.
Below the 2A usb connector is the auto mode chip (U3), but also space for fixed coding.
The other usb connectors has space for any coding and uses the DCP coding (R2, R43, R44).

DSC_1031

DSC_1032 DSC_1033

There is more than enough distance on the circuit board, below the opto coupler the distance is shorter, but that is fine because of the slit in the circuit board (Even without the slit the distance had been enough).
On the topside the distance is shorter, but there is some isolation. I did not have any problems with it.

Testing with 2500 volt and 5000 volt between mains and low volt side, did not show any safety problems.



Conclusion

The construction is decent, it can deliver the rated 4A. It can charge one pad and 3 phones at a time (As long as they are not all completely empty and trying to draw maximum current).
I only have two complains, one is too much noise in the output, the other is the rubber band design. It is not the black border I complain about, but that it is done with a rubber band!



Notes

The usb power supply was supplied by gearbest for a review.

Index of all tested USB power supplies/chargers
Read more about how I test USB power supplies/charger

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

Ormbett
Ormbett's picture
Offline
Last seen: 6 months 3 days ago
Joined: 02/26/2015 - 09:55
Posts: 1245
Location: Sweden

Thanks for the Review HKJ! At least there were screws under the rubber band :bigsmile:

Did the IKEA charger “koppla” managed to get in your queue?

Wilson
Wilson's picture
Offline
Last seen: 7 months 2 weeks ago
Joined: 01/08/2013 - 14:04
Posts: 407
Location: USA

I find the ability to plug in 5 amps (3 ports at 1amp, and 1 port at 2amps) worth of items to be a little at odds with the rated capacity of 4 amps. Sounds like an invitation to a problem. Or does a voltage drop happen in that case? If there is a voltage drop, what is the danger to the connected equipment?

Inquire…Choose…Proceed

HKJ
HKJ's picture
Offline
Last seen: 2 hours 29 min ago
Joined: 05/24/2011 - 12:23
Posts: 7434
Location: Copenhagen, Denmark

Ormbett wrote:
Did the IKEA charger "koppla" managed to get in your queue?

I got a box from Ikea and I believe it contains the usb charger and a couple of batteries, but I have not checked.

Wilson wrote:
I find the ability to plug in 5 amps (3 ports at 1amp, and 1 port at 2amps) worth of items to be a little at odds with the rated capacity of 4 amps. Sounds like an invitation to a problem. Or does a voltage drop happen in that case? If there is a voltage drop, what is the danger to the connected equipment?

Not that much of a problem, who is going to plug in 3 empty phones and a empty pad at the same time? I the equipment is plugged in over a timespan of a few hours it will not be a problem, because some of the equipment will be charged enough to reduce the charge current.

If too much equipment is plugged in the A3 will shut down and restart again shortly after. This will mean that all connected equipment will go in and out of charge mode all the time, this is easy to see and then remove a device.

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

Wilson
Wilson's picture
Offline
Last seen: 7 months 2 weeks ago
Joined: 01/08/2013 - 14:04
Posts: 407
Location: USA

Can you give us a little comment about this noise? Some of us are not familiar with electrical “noise”. For instance, is it audible? And what is the danger of electrical noise?

Inquire…Choose…Proceed

HKJ
HKJ's picture
Offline
Last seen: 2 hours 29 min ago
Joined: 05/24/2011 - 12:23
Posts: 7434
Location: Copenhagen, Denmark

Wilson wrote:
Can you give us a little comment about this noise? Some of us are not familiar with electrical "noise". For instance, is it audible? And what is the danger of electrical noise?

Usual it is not audible, but it depends on the connected equipment.

  • In rare cases it can damage connected equipment.
  • Sometimes it will make the connected equipment malfunction, like the touch screen stops working or works wrongly when connected to the charger.
  • Depending on the kind of noise (I do not analyse for this) it may also partial jam the receiver, i.e. make it less sensitive. This means that if you have a weak signal your phone will not work when connected to the charger.
  • Most of the time it does not really do anything significantly.

 

I have once tried a charger where my phone stated giving random presses on the touch screen. I was a bit worried about the phone, but it survived without any damage. After that I stopped connecting it to cheap chargers.

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

Wilson
Wilson's picture
Offline
Last seen: 7 months 2 weeks ago
Joined: 01/08/2013 - 14:04
Posts: 407
Location: USA

This charger does look nice, and the rubber band may help to soften a drop to the cement. Smile

Inquire…Choose…Proceed

HKJ
HKJ's picture
Offline
Last seen: 2 hours 29 min ago
Joined: 05/24/2011 - 12:23
Posts: 7434
Location: Copenhagen, Denmark

Wilson wrote:
This charger does look nice

I do also believe it is one of the better looking usb chargers (But not good looking).

Wilson wrote:
and the rubber band may help to soften a drop to the cement. :)

Not really, you have the plastic sticking out at the edge to keep the rubber band in place, i.e. the plastic will take the hit.

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

Ormbett
Ormbett's picture
Offline
Last seen: 6 months 3 days ago
Joined: 02/26/2015 - 09:55
Posts: 1245
Location: Sweden
HKJ wrote:
I got a box from Ikea and I believe it contains the usb charger and a couple of batteries, but I have not checked

Good news! Smile

(it´s made in China)

Lord_Niksidor
Offline
Last seen: 8 months 2 days ago
Joined: 06/23/2012 - 02:15
Posts: 69
Location: NSW Australia

Nice review, shame about the noise, though I am not really worried, I got the blitzwolf one you reviewed a while ago and am just about to buy another so i don’t have to move the one in my room when I travel.

Lord_Niksidor
Offline
Last seen: 8 months 2 days ago
Joined: 06/23/2012 - 02:15
Posts: 69
Location: NSW Australia
Ormbett wrote:
HKJ wrote:
I got a box from Ikea and I believe it contains the usb charger and a couple of batteries, but I have not checked

Good news! Smile

(it´s made in China)

That’s the first time I’ve ever heard anyone say that…

Ormbett
Ormbett's picture
Offline
Last seen: 6 months 3 days ago
Joined: 02/26/2015 - 09:55
Posts: 1245
Location: Sweden
Lord_Niksidor wrote:
That’s the first time I’ve ever heard anyone say that…

The good news is that HKJ got the box, nothing else Smile

fedcas
fedcas's picture
Offline
Last seen: 1 year 4 months ago
Joined: 04/26/2013 - 19:42
Posts: 283
Location: Italy

Hi HKJ and thanks again for all your interesting reviews Wink

received today the sku:13039901
http://www.gearbest.com/usb-gadgets/pp_189289.html?utm_source=youtube&ut...

I received a different product though. Black, no rubber band and it’s longer and has a switch on it. The model number on the label on the back is different, USC-004 instead of USC-001.

Unfortunately it’s not possible to open it without destroying the case, it’s die-cast. I wonder if it’s the same electronics inside with just an added switch or not… I think the differences may be more than that cause the led is in a different position. The barcode label on the box is identical but that’s the GB sku code.

HKJ
HKJ's picture
Offline
Last seen: 2 hours 29 min ago
Joined: 05/24/2011 - 12:23
Posts: 7434
Location: Copenhagen, Denmark

Have you checked for screws under the rubber feet and under the label?

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

fedcas
fedcas's picture
Offline
Last seen: 1 year 4 months ago
Joined: 04/26/2013 - 19:42
Posts: 283
Location: Italy

the label is flat to the touch, no screws underneath… I’ll check the rubber feets but I doubt there’s any screw, the plastic case looks casted/welded

EDIT: you were right! there are 4 screws under the rubber feets… the split line between the two shells of the case was so tight that it looked like they were welded together… very good build quality Smile

fedcas
fedcas's picture
Offline
Last seen: 1 year 4 months ago
Joined: 04/26/2013 - 19:42
Posts: 283
Location: Italy

Very strange, ther borders are now free, but there is something that locks the case and prevents it from opening. It looks like it’s something near the center of the pcb, in the area near the 2A port (I can lift the border all around the perimeter so there should be no plastic hooks in the perimeter, but the cover is still locked in place).
Was it like that also on your model? was there maybe hot glue or something similar?

HKJ
HKJ's picture
Offline
Last seen: 2 hours 29 min ago
Joined: 05/24/2011 - 12:23
Posts: 7434
Location: Copenhagen, Denmark

fedcas wrote:
Very strange, ther borders are now free, but there is something that locks the case and prevents it from opening. It looks like it's something near the center of the pcb, in the area near the 2A port (I can lift the border all around the perimeter so there should be no plastic hooks in the perimeter, but the cover is still locked in place).

Could it be another screw under the label (It is not always possible to feel them)?

fedcas wrote:
Was it like that also on your model? was there maybe hot glue or something similar?

No.

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

fedcas
fedcas's picture
Offline
Last seen: 1 year 4 months ago
Joined: 04/26/2013 - 19:42
Posts: 283
Location: Italy

ok thanks, I’ll try again tonight

MountainKing
Offline
Last seen: 1 month 2 weeks ago
Joined: 12/01/2011 - 03:20
Posts: 2276
Location: Lost Islands ™
HKJ wrote:
Sometimes it will make the connected equipment malfunction, like the touch screen stops working or works wrongly when connected to the charge

edited out….working perfectly today…only some problems in camera app…

Never ever forget and forgive. Niwal**er new kid on the block trying to act tough.
http://budgetlightforum.com/node/24847
Do not support this brand.

DINODIRECTSCAM COMPANY. DO NOT BUY
http://budgetlightforum.com/node/11324?page=2#comment-254983

fedcas
fedcas's picture
Offline
Last seen: 1 year 4 months ago
Joined: 04/26/2013 - 19:42
Posts: 283
Location: Italy

finally made it to the pcb Silly
those 2 plastic pins around the middle of the shell were glued :s

It looks identical to me, except for those two filter capacitors from the mains to ground. What do you think?