YZXStudio QC-12in1
Official specifications:
-
Product Type: Flash Charger Adapters
-
Brand: YZXstudio
-
Depth: 11 mm
-
Height: 45 mm
-
Width: 24 mm
-
Product Weight: 30 g
-
Input: QC2.0/QC3.0 18-24W
-
Output: 3-12V 24W Max
I got it from fasttech sku:9654019
The charger arrive in a envelope without any instructions or other accessories.
Measurements
-
Use 12V input voltage, can be from a QC charger.
-
Power consumption when idle is 2.4mA
-
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 3.63V
-
Weight: 19.5g
-
Size: 62.1 x 23.9 x 10.9mm
Test with Blitzwold BW-S9 usb charger
This charger can deliver slightly above 20W before the output voltage drops at 12V.
![](https://lygte-info.dk/pic/USB%20from%2012V/38%20YZXStudio%20QC-12in1/YZXStudio%20QC-12in1%205V.png)
There is cable compensation.
![](https://lygte-info.dk/pic/USB%20from%2012V/38%20YZXStudio%20QC-12in1/YZXStudio%20QC-12in1%209V.png)
![](https://lygte-info.dk/pic/USB%20from%2012V/38%20YZXStudio%20QC-12in1/YZXStudio%20QC-12in1%2012V.png)
Comparing these curves to the ones below shows that the QC charger limits the power, not this device.
Test with power supply
![](https://lygte-info.dk/pic/USB%20from%2012V/38%20YZXStudio%20QC-12in1/Load%20sweep%2012V%205V.png)
At 5V the output is limited to about 3.6A and there is some cable compensation. Efficiency is above 90% most of the time.
![](https://lygte-info.dk/pic/USB%20from%2012V/38%20YZXStudio%20QC-12in1/Load%20sweep%2012V%209V.png)
At 9V the maximum current is about 3.4A and there is also cable compensation here and even better efficiency.
![](https://lygte-info.dk/pic/USB%20from%2012V/38%20YZXStudio%20QC-12in1/Load%20sweep%2012V%2012V.png)
At 12V the current is limited to 3.2A and the cable compensation do not work, due to the limited input voltage.
![](https://lygte-info.dk/pic/USB%20from%2012V/38%20YZXStudio%20QC-12in1/Voltage%20sweep%203.0A%20input%20current.png)
![](https://lygte-info.dk/pic/USB%20from%2012V/38%20YZXStudio%20QC-12in1/Voltage%20sweep%203.0A.png)
The device shuts down at around 10V input.
![](https://lygte-info.dk/pic/USB%20from%2012V/38%20YZXStudio%20QC-12in1/Voltage%20sweep%203.0A%2012V%20input%20current.png)
![](https://lygte-info.dk/pic/USB%20from%2012V/38%20YZXStudio%20QC-12in1/Voltage%20sweep%203.0A%2012V.png)
When 12V output is selected it will drop some before the device shuts down.
![](https://lygte-info.dk/pic/USB%20from%2012V/38%20YZXStudio%20QC-12in1/No%20load%20voltage%20sweep.png)
The input current is fairly constant until the device shuts down.
![](https://lygte-info.dk/pic/USB%20from%2012V/38%20YZXStudio%20QC-12in1/Load%20test%203.0A.png)
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.
![](https://lygte-info.dk/pic/USB%20from%2012V/38%20YZXStudio%20QC-12in1/Temp6637.png)
HS1: 52.7°C
Being a aluminium enclosure the outside has nearly constant temperature all around.
![](https://lygte-info.dk/pic/USB%20from%2012V/38%20YZXStudio%20QC-12in1/Temp6638.png)
HS1: 52.6°C
![](https://lygte-info.dk/pic/USB%20from%2012V/38%20YZXStudio%20QC-12in1/Temp6639.png)
M1: 46.8°C, HS1: 52.6°C
The ends are made from circuit board and is considerable cooler.
![](https://lygte-info.dk/pic/USB%20from%2012V/38%20YZXStudio%20QC-12in1/10ohm.png)
At 0.5A the noise is 10mV rms and 141mVpp.
![](https://lygte-info.dk/pic/USB%20from%2012V/38%20YZXStudio%20QC-12in1/5ohm.png)
At 1A the noise is 5mV rms and 82mVpp.
![](https://lygte-info.dk/pic/USB%20from%2012V/38%20YZXStudio%20QC-12in1/2ohm.png)
At 2.5A the noise is 6mV rms and 64mVpp.
![](https://lygte-info.dk/pic/USB%20from%2012V/38%20YZXStudio%20QC-12in1/10ohmQC9V.png)
At 0.5A the noise is 5mV rms and 68mVpp.
![](https://lygte-info.dk/pic/USB%20from%2012V/38%20YZXStudio%20QC-12in1/10ohmQC12V.png)
At 0.5A the noise is 5mV rms and 65mVpp, all very low noise values.
Tear down
![](https://lygte-info.dk/pic/USB%20from%2012V/38%20YZXStudio%20QC-12in1/DSC_5685.jpg)
It was easy to open with four small screws. The small round holes at one end is for a led (One led, but the cover can be mounted either way around).
![](https://lygte-info.dk/pic/USB%20from%2012V/38%20YZXStudio%20QC-12in1/DSC_5687.jpg)
On this side is a capacitor and some heat transfer rubber. The capacitor is on the output side.
![](https://lygte-info.dk/pic/USB%20from%2012V/38%20YZXStudio%20QC-12in1/DSC_5688.jpg)
![](https://lygte-info.dk/pic/USB%20from%2012V/38%20YZXStudio%20QC-12in1/DSC_5689.jpg)
![](https://lygte-info.dk/pic/USB%20from%2012V/38%20YZXStudio%20QC-12in1/DSC_5686.jpg)
All parts are mounted on this side. There is a 6 pin chip, probably microprocessor, to trigger the 12V QC from the input connector and control at least part of the led. Next to it is a voltage regulator (SE8533: 3.3V). The output controller 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.
![](https://lygte-info.dk/pic/USB%20from%2012V/38%20YZXStudio%20QC-12in1/DSC_5690.jpg)
![](https://lygte-info.dk/pic/USB%20from%2012V/38%20YZXStudio%20QC-12in1/DSC_5691.jpg)
![](https://lygte-info.dk/pic/USB%20from%2012V/38%20YZXStudio%20QC-12in1/DSC_5693.jpg)
![](https://lygte-info.dk/pic/USB%20from%2012V/38%20YZXStudio%20QC-12in1/DSC_5692.jpg)
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.
The device works fine and with good efficiency.
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