Test/review of Web W12-A2A

12 posts / 0 new
Last post
HKJ
HKJ's picture
Offline
Last seen: 8 hours 40 min ago
Joined: 05/24/2011 - 12:23
Posts: 6536
Location: Copenhagen, Denmark
Test/review of Web W12-A2A

Web W12-A2A

DSC_0624

Official specifications:


  • Product Type: Flash Charger Adapters
  • Brand: YZXstudio
  • Input: QC2.0/QC3.0
  • Supported protocols: BC 1.2, Apple 2.4A, SFCP, QC 2.0, QC 3.0, FCP, SCP, AFC, MTK PE+1.1, MTK PE+2.0, OPPO VOOC, DASH

I got it from aliexpress dealer: Great vendor

DSC_0623

The charger arrive in a cardboard box, that was more than big enough for this device.

DSC_0626

DSC_0627

DSC_0628DSC_0629

There is a led on each side of the USB connector on the end marked “WEB-” at the top.



Measurements


  • Use 12V input voltage, can be from a QC charger.
  • Power consumption when idle is 5mA
  • USB output is auto coding with Apple 2.4A, Samsung, DCP, QC3, Samsung-AFC, Huawei-FCP, Huawei-SCP, PE1.1, PE2.0
  • Minimum QC3 voltage is 3.64V
  • Weight: 34.2g
  • Size: 64.7 × 27.9 × 15.5mm


Test with Blitzwold BW-S9 usb charger

This charger can deliver slightly above 20W before the output voltage drops at 12V.

Web%20W12-A2A%20QC5V

There is cable compensation.

Web%20W12-A2A%20QC9V

Web%20W12-A2A%20QC12V

Comparing these curves to the ones below shows that the QC charger limits the power, not this device.



Test with power supply

Load%20sweep%2012V%205V

At 5V the output is limited to about 3.6A and there is some cable compensation. Efficiency is above 90% most of the time. The output current goes up to 5A before the voltage drops.

Load%20sweep%2012V%209V

At 9V the maximum current is about 4.5A and there is also cable compensation here and even better efficiency.

Load%20sweep%2012V%2012V

At 12V the current is limited to 4.5A and the cable compensation do not work, due to the limited input voltage.

Voltage%20sweep%203.0A%205V%20input%20current

Voltage%20sweep%203.0A%205V

The device shuts down slightly above 10V input.

Voltage%20sweep%203.0A%2012V%20input%20current

Voltage%20sweep%203.0A%2012V

When 12V output is selected it will drop some before the device shuts down.

No%20load%20voltage%20sweep

The input current is fairly constant until the device shuts down.

Load%20test%203.0A

There was no problem running 1 hour with 3A load at 12V.
The temperature photos below are taken between 30 minutes and 60 minutes into the one hour test.

Temp6640

HS1: 45.4°C
Being a aluminium enclosure the outside has nearly constant temperature all around.

Temp6642

HS1: 46.0°C

Temp6641

HS1: 48.8°C

10ohm

At 0.5A the noise is 7mV rms and 100mVpp.

5ohm

At 1A the noise is 4mV rms and 98mVpp.

2ohm

At 2.5A the noise is 9mV rms and 92mVpp.

10ohmQC9V

At 0.5A the noise is 11mV rms and 78mVpp.

10ohmQC12V

At 0.5A the noise is 3mV rms and 103mVpp, all very low noise values.



Tear down

DSC_5742

Four small screws at each end and the box was open.

DSC_5744

The circuit board has more specifications than I have seen elsewhere, but this side do not have any parts.

DSC_5745

DSC_5743

All electronic is here, the main chip is a USB PD controller (IP6518) it supports: DCP/QC2.0/QC3.0/PE+1.1/PE2.0/FCP/AFC/SFCP/SCP/USB PD and is also the switching regulator. The PD function is obvious not used here.
There is also a 3 pin voltage regulator (5333B) and a unknown chip, probably a microprocessor to handle QC on the input. At the output is two leds, one of them dual color.

DSC_5746

DSC_5747 DSC_5749


DSC_5748




Conclusion

This device can secure that any Quick Charger will support just about any fast charge protocol. I do not know how useful this is, normally I would prefer to get a charger with native support for the fast charge protocol that is needed.
It can also be used after a 12V power supply to provide USB power, again with all charge protocols supported.

The device works fine and with good efficiency, but the current limit is rather high.



Notes

Review of Blitzwold BW-S9 usb charger

Read more about how I test USB power supplies/charger
Compare car chargers and other DC supplied chargers

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

The_Driver
The_Driver's picture
Offline
Last seen: 16 min 11 sec ago
Joined: 10/20/2016 - 05:51
Posts: 1296
Location: Germany

Thanks for this test and maing me aware of this product!
It’s great! I have been looking for a MTK Pump Express charger.

Barkuti
Barkuti's picture
Offline
Last seen: 18 min 51 sec ago
Joined: 02/19/2014 - 14:46
Posts: 3278
Location: Alhama de Murcia, Spain

Interesting device, could be used to interface a Qualcomm QC3.0 supply to a OnePlus/Oppo device.

Couldn't find it in AliExpress right now, is it affordable?

 

Party 

Sofirn C8T and C8F reviews of mine

PMme for a tip Wink thanks

d_t_a
Offline
Last seen: 15 hours 27 min ago
Joined: 08/04/2017 - 23:58
Posts: 1040
Location: Manila, Philippines

There seems to be several different variants of this thing (is the brand really "YZXStudio"?)

It seems to be WEB- brand (like the other "WEB-" branded USB meters/load testers?)

 

https://www.aliexpress.com/item/WEB-UPD003-fast-charge-13-to-1-charge-QC...

vito45
Offline
Last seen: 2 days 23 hours ago
Joined: 11/07/2017 - 06:16
Posts: 4
Location: Slovakia

Barkuti wrote:

Interesting device, could be used to interface a Qualcomm QC3.0 supply to a OnePlus/Oppo device.


Couldn’t find it in AliExpress right now, is it affordable?


 


Party 


I have it and it is fast charging my OnePlus 5 and Huawei P10.
It costs around 10-15€. I get it from taobao.
Barkuti
Barkuti's picture
Offline
Last seen: 18 min 51 sec ago
Joined: 02/19/2014 - 14:46
Posts: 3278
Location: Alhama de Murcia, Spain

d_t_a wrote:
https://www.aliexpress.com/item/WEB-UPD003-fast-charge-13-to-1-charge-QC-DC-to-PD-VOOC-SCP-FCP-AFC/32955627932.html

Thanks for sharing d_t_a. The advertisement, as I see it, is an insane mess concerning model selection. I don't Mandarin and to make things worse can't select the text to put it in a translator because it is in the images. Can't select the product description text by normal means and editing the page code is not exactly straightforward, but this is what I got:

 

title="Army Green", data-sku-id="200004889"

 


title="Dark Grey", data-sku-id="200004890"

 

title="Lavender", data-sku-id="200004891"

 

title="Multi", data-sku-id="200003699"

 

title="Ivory", data-sku-id="200002130"

 

title="Brown", data-sku-id="365458"

 

title="Gold", data-sku-id="350850"

 

title="Orange", data-sku-id="350852"

Which is of some help, but still is an amazing mess. The seller needs some help to put some understandable model numbers and occidental language in the pictures and the product description.

 

Cheers 

Sofirn C8T and C8F reviews of mine

PMme for a tip Wink thanks

Barkuti
Barkuti's picture
Offline
Last seen: 18 min 51 sec ago
Joined: 02/19/2014 - 14:46
Posts: 3278
Location: Alhama de Murcia, Spain

vito45 wrote:

I have it and it is fast charging my OnePlus 5 and Huawei P10. It costs around 10-15€. I get it from taobao.

No experience with taobao. 

I do not particularly need such a device, a friend of mine maybe.

The circuitry is interesting, efficient and high output quality.

 

Party

Sofirn C8T and C8F reviews of mine

PMme for a tip Wink thanks

HKJ
HKJ's picture
Offline
Last seen: 8 hours 40 min ago
Joined: 05/24/2011 - 12:23
Posts: 6536
Location: Copenhagen, Denmark

My guess is that all the circuits uses the same converter chip, i.e. the difference is only the input and output connectors. The first one (W20) has a slightly different configuration with higher output voltage and lower current.

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

dodge_911
dodge_911's picture
Offline
Last seen: 3 days 13 hours ago
Joined: 02/18/2016 - 15:07
Posts: 208
Location: DodgeReviews HQ

HKJ wrote:
My guess is that all the circuits uses the same converter chip, i.e. the difference is only the input and output connectors. The first one (W20) has a slightly different configuration with higher output voltage and lower current.

I don't think this is by YZXStudio, but by WITRN/WEB.

WEB recently changed their name to WITRN.

:: youtube ::
http://bit.ly/dodgereviewsyt
    :: powerbank capacity tests ::
http://bit.ly/drpbcc
:: μusb cable tests ::
http://bit.ly/drmicrousb
:: lightning cable tests ::
http://bit.ly/drlightning
 :: type-C cable tests ::
http://bit.ly/drtypec

 

HKJ
HKJ's picture
Offline
Last seen: 8 hours 40 min ago
Joined: 05/24/2011 - 12:23
Posts: 6536
Location: Copenhagen, Denmark
dodge_911 wrote:

I don’t think this is by YZXStudio

It is not, but they are very similar. I also have a review of the YZXStudio on the way.

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

angerdan
angerdan's picture
Offline
Last seen: 2 days 6 hours ago
Joined: 11/01/2015 - 10:07
Posts: 391

Barkuti wrote:
Couldn’t find it in AliExpress right now, is it affordable?

It has been on AE on in summer 2018.
http://budgetlightforum.com/comment/1346219#comment-1346219
voip
Offline
Last seen: 3 days 9 hours ago
Joined: 09/15/2017 - 05:53
Posts: 58

Thanks for another excellent review. appreciate it.