Test/review of BlitzWolf 30W PD usb charger BW-S10

HKJ · 2018-05-19T15:03:14.000Z

BlitzWolf 30W PD usb charger BW-S10

Official specifications:

Brand: BlitzWolf
Model: BW-S10
Plug: EU
USB Port: USB Type-C Port
Total Power: 30W (Max)
Input: AC 100-240V~50/60Hz 0.8A
Output: PD Mode: 5V/3A, 9V/2A, 12V/2A, 15V/2A, 20V/1.5A
Output: QC3.0 Mode: 5V/3A, 9V/2A, 12V/1.5A
Size: 54.5*54*28.5mm/2.15*2.14*1.12inch
Weight: 150g±10g
Fast Charging: USB PD (Power Delivery ), QC2.0, QC3.0, BC1.2

I got it from Banggood

Blitzwolf uses a white cardboard box with some specifications on it.

The box contained the charger, manual and a note.

Measurements

Power consumption when idle is 0.07 watt at 230VAC
PD modes: 5V 3A, 9V 3A, 12V 2.5A, 15V 2A, 20V 1.5A
In addition to PD output also supports QC3 up to 12V and DCP, but only if there is a resistor to turn USB-C on.
Default state for usb output is off.
Lowest QC3 voltage is 3.5V
Size: 92 x 54.2 x 28.3mm
Weight: 93g

Output is rated for 3A at 5V and can deliver a bit above 3.5A, this is fine. The output voltage increases with load, this charger has cable compensation.

At 9V the output current is the same.

At 12V the current is limited to 3A

At 15V it is down to about 2.3A
Overloading will drop the port to 5V after a short off period.

And at 20V it is 2A.

Also with 120VAC input.

Running at 20V 1.5A for one hour is no problem.
The temperature photos below are taken between 30 minutes and 60 minutes into the one hour test.

HS1: 62.3°C
HS1 is the transformer.

M1: 44.1°C, M2: 39.8°C, HS1: 47.8°C

M1: 58.4°C, HS1: 63.5°C
HS1 is the white stuff between the transformer and the enclosure, it is transferring heat from the transformer.

M1: 50.3°C, HS1: 62.6°C

M1: 52.8°C, HS1: 61.8°C

Unloaded the noise is 15mV rms and 134mVpp

At 0.5A the noise is 25mV rms and 185mVpp

At 1A the noise is 8mV rms and 150mVpp

At 2.5A the noise is 16mV rms and 307mVpp

At PD 12V 2.4A the noise is 8mV rms and 152mVpp

At PD 15V 1.5A the noise is 9mV rms and 181mVpp

At PD 20V 1.3A the noise is 9mV rms and 163mVpp, all noise values are very low.

Tear down

Some pressure with a vice and I could break the lid off.

At the mains input is a fuse and two common mode coils. There is also an inductor between the smoothing capacitors. The safety capacitor is mounted through a slit in the isolation paper. The mains switcher transistor in on a heatsink inside the gray stuff (The pins can be seen on the other side of the circuit board). The usb-C connector is mounted on a small circuit board.

The small board with the usb connector, is has some capacitors and resistors on it.

At the mains input is the bridge rectifier (BD1). The mains switcher is a 6 pin IC (U2). There is a opto coupler for feedback (U3). The rectification is done with a power mos (Q3) and a synchronous controller chip (U4). The USB PD and QC is handled by the larger chip (WT6632F) and it need a power mos to control the output (Q2). The 0.005ohm resistor (R005) is probably used to compensate for cable voltage drop and for current limiting.

The isolation distance is a bit short at around 5.5mm

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

Conclusion

A nice USB-C PD charger with a good amount of power for phones and tablets, but markings on the charger do not match the specifications. The noise is low.

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?

dodge_911 · 2018-05-21T21:10:01.000Z

I found the same in my test of this thing.

Performs way better than specifications promise.

angerdan · 2019-06-27T09:23:41.000Z

Will there be a review of the succesor BW-S11 ?

Review request for HKJ [USB Power Devices] USB Power Devices

BlitzWolf BW-S11 30W Type-C PD/QC3.0+2.4A Dual USB Charger BlitzWolf BW-S11 30W Type-C PD / QC3.0 + 2.4A Schnellladegerät mit zwei USB-Anschlüssen Sale - Banggood Deutschland sold out-arrival notice-arrival notice https://www.ebay.de/itm/USB-C-Ladegerät-mit-Power-Delivery-BlitzWolf-QC3-0-30W-2-Port-USB-Weiß-1/401761953605 . RAVPower RP-PC108 usb-c-pd-charger-quick-charge-dual-port-wall-charger https://www.ravpower.com/p/usb-c-pd-charger-quick-charge-dual-port-wall-charger.html https://www…

HKJ · 2019-06-27T09:31:01.000Z

angerdan:

Will there be a review of the succesor BW-S11 ?
Review request for HKJ [USB Power Devices] - #577 by angerdan

I expect so.

qwertsun · 2019-06-28T14:16:27.000Z

Thank you HKJ. Lovely to see more PD chargers being tested.

I’ve recently come across an intriguing PD charger. It is one of the smallest PD charger I’ve seen and what surprises me is that it supports up to 20v/1A from it’s USB-C PD port.

Do have a look if you are interested or have the time, and I’ll be happy to hear what your thoughts are. Cheers!

Here is the link to the product.

https://www.gearbest.com/chargers-cables/pp_1627690.html

mrheosuper · 2019-06-28T14:45:16.000Z

qwertsun:

Thank you HKJ. Lovely to see more PD chargers being tested.

I’ve recently come across an intriguing PD charger. It is one of the smallest PD charger I’ve seen and what surprises me is that it supports up to 20v/1A from it’s USB-C PD port.

Do have a look if you are interested or have the time, and I’ll be happy to hear what your thoughts are. Cheers!

Here is the link to the product.

https://www.gearbest.com/chargers-cables/pp_1627690.html

it even has a F-ING brushless motor inside it :person_facepalming:

qwertsun · 2019-06-28T14:47:19.000Z

Apologies. I am a total novice when it comes to such things(thus why I am here).

I assume a brushless motor inside is just plain gibberish?

mrheosuper · 2019-06-28T15:57:54.000Z

qwertsun:

Apologies. I am a total novice when it comes to such things(thus why I am here).

I assume a brushless motor inside is just plain gibberish?

i see, let me explain it for you( and sorry for my broken English)

the motor in the pic is RC brushless motor( used mostly in RC drones and planes), they are small, but has high power( i’m talking hundreds of watt), and can generate a small tornado in your house

obviously they won’t install that inside 30W charger, will they ?

qwertsun · 2019-06-28T17:47:31.000Z

Ahaha, I see. Now it makes me wonder why did they even place a picture of the RC motor inside the small charger Anyway if this charger is safe(construction & electronics-wise), it’ll make a superb small and light laptop charger!

Also, don’t worry at all, your English is perfectly understandable!!

mrheosuper · 2019-06-28T18:08:30.000Z

For small and light laptop charger, i recommend you take a look at anker atom 30W, it uses GaN material inside, reduce the size and heat being generated.

There are also anker atom 3 if you want more power.

HKJ · 2019-06-28T18:31:47.000Z

I am not impressed with the image of the motor, here is a better one:

A blade on it and we got some internal air circulation for better cooling (Just joking).

qwertsun · 2019-06-29T07:10:24.000Z

HKJ:

I am not impressed with the image of the motor, here is a better one:

A blade on it and we got some internal air circulation for better cooling (Just joking).

Ahh, so that is the motor! That is how fabulous my nonexistential electrical/technical expertise is!

I wonder why did Baseus even put this motor inside this picture. I say it is as a marketing gimmick to show how much components it have to laymen like me, urgh.

qwertsun · 2019-06-29T07:09:32.000Z

mrheosuper:

For small and light laptop charger, i recommend you take a look at anker atom 30W, it uses GaN material inside, reduce the size and heat being generated.

There are also anker atom 3 if you want more power.

Thanks for your recommendations. Love Anker products and am intrigued by their new GaN series products; sadly it is really costly when there are so many other products that give a bigger bang for the buck.

Anyway, I require an adapter that provides at least 20V and more importantly, it is of UK plug type and none of the Anker Atoms are UK type as far as I can find/tell/that is available in Singapore. Also, would you just look at those ridiculously marked up prices? Jeez.

raccoon · 2019-06-29T07:21:29.000Z

Anker products are reasonably priced on American Amazon...

How are the prices on Singaporean Amazon?

qwertsun · 2019-06-29T08:33:12.000Z

raccoon city:

Anker products are reasonably priced on American Amazon…

How are the prices on Singaporean Amazon?

Indeed. Personally, I feel that you peeps from the States are really lucky with electronic stuffs. The stuffs on amazon are always competitively priced, especially laptops!

We do not have Amazon in Singapore, only Amazon Prime. Most products are mostly delivered from the States with shipping costs.

There are times where Aukey products are slightly cheaper in Singapore when compared to the states. For Anker products - I’ll pass.