BlitzWolf 30W QC3 4 port USB Charger BW-PL5

DSC_0780

Official specifications: I got it from Banggood

DSC_0769
DSC_0770

I got it in a small cardboard box with a label describing the contents.

DSC_0771

It contained the charger and a instruction sheet.

DSC_0774 DSC_0777 DSC_0778

DSC_0775 DSC_0779

DSC_0776



Measurements

BlitzWolf%20BW-PL5%20%231%20230V%20load%20sweep

Output 1 can deliver a bit above 2.6A. There is some cable compensation (i.e. the output voltage will increase with load).

BlitzWolf%20BW-PL5%20%233%20230V%20load%20sweep

Output 3 can also deliver a bit above 2.6A

BlitzWolf%20BW-PL5%20230V%20load%20sweep

Using all 3 regular output is the same 2.6A

BlitzWolf%20BW-PL5%20120V%20load%20sweep

Output current is slightly less at 120VAC.

BlitzWolf%20BW-PL5%20QC5V%20230V%20load%20sweep

The QC output can deliver about 3.7A on 5V


BlitzWolf%20BW-PL5%20QC9V%20230V%20load%20sweep

This is down to 3.2A at 9V


BlitzWolf%20BW-PL5%20QC12V%20230V%20load%20sweep

And about 2.5A at 12V, all well above the rated specifications.

BlitzWolf%20BW-PL5%20QC12V%20120V%20load%20sweep

The maximum output current drops slightly at 120VAC, but is still well above specifications.

BlitzWolf%20BW-PL5%20230V%20load%20test

Running one hour with 5V 2.4A and 12V 1.5A worked fine.
The temperature photos below are taken between 30 minutes and 60 minutes into the one hour test.

Temp7165

M1: 52.9C, M2: 56.5C, HS1: 65.8C
HS1 is the regular USB transformer.

Temp7166

M1: 54.1C, HS1: 58.7C

Temp7167

HS1: 57.5C

Temp7168

M1: 66.1C, M2: 64.1C, HS1: 72.0C

Temp7169

M1: 48.9C, HS1: 70.9C

10ohm

At 0.5A the noise is 7mV rms and 127mVpp.

5ohm

At 1A the noise is 9mV rms and 138mVpp.

2ohm

At 2.5A the noise is 10mV rms and 147mVpp.

10ohmQC9V

At 0.9A the noise is 26mV rms and 684mVpp.

10ohmQC12V

At 1.2A the noise is 31mV rms and 825mVpp.




Tear down

DSC_2311

I could not break this charger open, but had to cut a bit.

DSC_2293

The electronic did not leave the charger easily either, there was a lot of the white stuff to keep it in.

DSC_2294


DSC_2296 DSC_2297

DSC_2298 DSC_2299

DSC_2300

At the mains input is a fuse, followed by a common mode coil. there is two sets of mains smoothing capacitors each wit a inductor between them. These is also two safety capacitors, one for each transformer.
Between the USB connectors are some leds.

DSC_2302 DSC_2303

DSC_2304 DSC_2305

DSC_2295 DSC_2301

There is a production fault at the mains input, one of the wires are not soldered!
On this side is the bridge rectifier (BD1), there is two switcher IC's, for the regular USB output a small one (U3: OB2502) and for QC a larger all in one (U1: SC1271K). On the low volt side is a synchronous rectifier (U7: OB2005) for USB and the all in one chip only needs a MOS transistor for (U8: MOSFET HYG072N10 100V 80A) synchronous rectification. For the regular usb is two auto coding chip, a single (U2: Marked 1202) and a dual (U4: Marked 1212). The QC3 has its own control chip (U10: FT41).

DSC_2315

DSC_2308

There is good safety distance between low volt side and mains.


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



Conclusion

The charger works fine, but there is no reason for 3 regular USB outputs, the charger only has power for one! The QC output has more than enough power.
Except for the production fault (Missing solder) the charger looks good.



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?