Test/review of Xtar 18W Wall Adapter DBS15Q

9 posts / 0 new
Last post
HKJ
HKJ's picture
Offline
Last seen: 2 hours 3 min ago
Joined: 05/24/2011 - 12:23
Posts: 7425
Location: Copenhagen, Denmark
Test/review of Xtar 18W Wall Adapter DBS15Q

Xtar 18W Wall Adapter DBS15Q
DSC_9499
Official specifications:


  • Model: DBS15Q
  • Input: 100-240VAC 50/60Hz
  • Output: 5V 3A, 9V 2A, 12V 1.5A

I got this charger from Xtar together with the PB2S battery charger and power bank.
DSC_9495 DSC_9496 DSC_9497 DSC_9498
It was in a cardboard box without any accessories.
DSC_9500
DSC_9501 DSC_9503 DSC_9504 DSC_9505
DSC_9502
DSC_9506
Measurements


  • USB output is coded as Apple 2.4A, DCP, QC3, Samsung-AFC, Huawei-FCP
  • Minimum QC3 voltage is 3.7V
  • Power consumption when idle is 0.05 Watt
  • USB outputs are in parallel
  • Weight: g
  • Size: mm

Xtar%2018W%20Wall%20Adapter%20230V%20load%20sweep
Output on 5V is about 3.3A
Xtar%2018W%20Wall%20Adapter%20QC9V%20230V%20load%20sweep
On 9V it is 2.5A
Xtar%2018W%20Wall%20Adapter%20QC12V%20230V%20load%20sweep
And on 12V it is 1.8A, all matches the specifications very nicely.
Xtar%2018W%20Wall%20Adapter%20QC12V%20120V%20load%20sweep
With 120VAC the 12V output is slightly higher at 2A.
Xtar%2018W%20Wall%20Adapter%20230V%20load%20test
For a load test I used 9V 2A load for one hour, it worked fine.
The temperature photos below are taken between 30 minutes and 60 minutes into the one hour test.
Temp7060
M1: 60.6°C, HS1: 65.7°C
HS1 is the mains transformer.
Temp7061
HS1: 60.4°C
HS1 is the mains switcher transistor and circuit board.
Temp7062
M1: 58.2°C, HS1: 59.2°C
HS1 is the mains transformer, M1 is probably the rectifier.
Temp7063
HS1: 51.1°C
Temp7064
M1: 55.1°C, HS1: 64.7°C
10ohm
At 0.5A the noise is 13mV rms and 259mVpp.
5ohm
At 1A the noise is 17mV rms and 441mVpp.
2ohm
At 2.5A the noise is 84mV rms and 732mVpp.
10ohmQC9V
At 9V 0.9A the noise is 18mV rms and 322mVpp.
10ohmQC12V
At 12V 1.2A the noise is 25mV rms and 348mVpp.
Tear down
DSC_9939
I used my usual method of mounting the bottom in my vice and whacking the top with a mallet, the charger did open, but the bottom broke.
DSC_9940
On this side of the circuit board is a input fuse, a inrush current limiter (NTC1), a common mode coil. The mains switcher transistor is on small heatsink. Between mains and output is the usually safety capacitor (CY1).
DSC_9942 DSC_9943
DSC_9944 DSC_9945
DSC_9941
On this side is the mains bridge rectifier (BD1) and the mains switcher controller (U1), there is opto feed back (U2) from the low volt side.
The low volt side is a synchronous rectifier transistor (U3: Marked 30040/K0202) and controller (U4). The USB output is controlled from a QC controller (Q5: FT42?A) and a 3pin device, probably a 431 reference.
DSC_9946
DSC_9947 DSC_9948
It looks like the distance between low volt and mains is around 6mm.
Testing with 2830 volt and 4242 volt between mains and low volt side, did not show any safety problems.
Conclusion
This is a QC3 charger with support for a few extra codings.
It is a good charger.
Notes
The charger was supplied by Xtar for review.
Review of PB2S
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/

samgalax
Offline
Last seen: 2 hours 24 min ago
Joined: 03/22/2012 - 18:06
Posts: 693
Location: In front of you!

Thanks for your review.

This is the included power supply that xtar added to the PB2S testers?

Please SUBSCRIBE to my youtube channel (flashlights, electronic gadgets and various stuff..)

https://www.youtube.com/channel/UCCF3RcoQ3Ff05Cr4-Gg5qAw

I am a beginner. So please help me to make the channel "grow up"

Thanks!!

HKJ
HKJ's picture
Offline
Last seen: 2 hours 3 min ago
Joined: 05/24/2011 - 12:23
Posts: 7425
Location: Copenhagen, Denmark
samgalax wrote:
This is the included power supply that xtar added to the PB2S testers?

Yes.

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

fran82
Offline
Last seen: 9 months 2 weeks ago
Joined: 07/31/2010 - 10:15
Posts: 2588

This PS is available to be purchased on ebay or any other place?

I can not find it anywhere… Or maybe I am blind.

This post/thread "may" contain referrals, a little contribution I "earn" in form of points ONLY if you buy the item. The purpose is to redeem items using the points and then making reviews of them in the forums to shar

fran82
Offline
Last seen: 9 months 2 weeks ago
Joined: 07/31/2010 - 10:15
Posts: 2588

Thank you

This post/thread "may" contain referrals, a little contribution I "earn" in form of points ONLY if you buy the item. The purpose is to redeem items using the points and then making reviews of them in the forums to shar

d_t_a
Offline
Last seen: 22 hours 19 min ago
Joined: 08/04/2017 - 23:58
Posts: 2519
Location: Manila, Philippines

Thanks for another in-depth technical review!

I also got this charger with the Xtar PB2S.

The charger came in the same box packaging as above, but the label on the charger is a bit different: it doesn’t say “Xtar”, but indicates “FullPower”. Same model number “DBS15Q” though.

(I think this may be the only charger I’ve checked that supports Samsung AFC-12v protocol, as I always see that protocol in red (unsupported) with my other QC3 chargers/powerbanks).

HKJ
HKJ's picture
Offline
Last seen: 2 hours 3 min ago
Joined: 05/24/2011 - 12:23
Posts: 7425
Location: Copenhagen, Denmark
d_t_a wrote:
The charger came in the same box packaging as above, but the label on the charger is a bit different: it doesn’t say “Xtar”, but indicates “FullPower”. Same model number “DBS15Q” though.

No surprise, I expected it was a OEM charger.

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

HQ2711
Offline
Last seen: 7 months 2 days ago
Joined: 11/18/2020 - 03:04
Posts: 1
Location: Indonesia

I buy nitecore um2 charger with qc 2.0 and waiting for the shipment.

Can this wall charger work with this charger?

Thanks.

Phlogiston
Phlogiston's picture
Offline
Last seen: 1 week 18 hours ago
Joined: 10/27/2016 - 16:57
Posts: 986
Location: Scotland

Thanks for the review, HKJ.

I have an Xtar DBS15QB with a UK plug on it. I don’t know if the ‘B’ at the end is just for the different plug, or if the design inside is different too. It has the same 18W QC3.0 specification as your DBS15Q and came from here:

https://18650.uk/product/xtar-qc3-0-usb-adapter/

It has an Xtar logo on it and was made by “Shenzhen Shi Yingyuan Electronics Co. Ltd” in China.