Hoco 2x18W PD car Z20A
![DSC_9379](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/DSC_9379.jpg)
Official specifications:
- Input: DC12-24V
- Output: Type-C: DC5V / 3.0A (PD), DC9V / 2.0A (PD), DC12.0V / 1.5A (PD), 18W;
- USB Output: QC3.0 (3.6-6.5V / 2.4A 6.5-9V / 2A 9-12V / 1.5A)
- Flame retardant PC material + zinc alloy shell, durable
- 18W PD output + QC3.0 dual output total power 36W, fully meet The charging needs
- Multiple circuit protection, compatible with PD input mobile phone/ tablet / PD input some of notebooks and QC3.0 / QC2.0 digital Devices
I got it from Aliexpress dealer: BYKRSEN Store
![DSC_9358](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/DSC_9358.jpg)
The box only contained the charger, no instruction sheet or usb cable.
![DSC_9382](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/DSC_9382.jpg)
There is a ring around the connectors, it has a weak blue light behind it.
![DSC_9384](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/DSC_9384.jpg)
![DSC_9386](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/DSC_9386.jpg)
Measurements
- PD codes: 5V 2.39A, 9V 2.15A, 12V 1.51A 5V is marked as 3A on the charger
- PD outputs starts enabled.
- PD output is auto code with DCP, Apple 2.4A, Samsung, QC3, Samsung-AFC, Huawei-FCP, Huawei-SCP
- QC output is auto detect with DCP, Apple 2.4, QC3, PE2.0, Huwai-FCP, Huwai-SCP, Samsung-AFC
- Minimum QC3 voltage is 5.0V QC3 is supposed to be lower than that
- Power consumption is 7mA from 12V and 5mA from 24V
The charger has many different output voltages and with input support up to 24V this makes for many combinations, I have tested many of them, but will not show all here.
![No%20load%20voltage%20sweep](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/No%20load%20voltage%20sweep.png)
Power consumption when noting is connected to output depends on input voltage.
QC output
![Load%20sweep%2011.6VQC5V](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/Load%20sweep%2011.6VQC5V.png)
5V output with low input voltage, this looks good up to about 3.6A
![Load%20sweep%2011.6VQC9V](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/Load%20sweep%2011.6VQC9V.png)
9V output, again with low input voltage, the output can deliver about 1.7A, rating is 2A or 1.5A (It has both ratings)
![Load%20sweep%2011.6VQC12V](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/Load%20sweep%2011.6VQC12V.png)
12V output with low input voltage is a bit problematic (This is the same on just about any car charger), it gets nearly up to 1.7A before it drops, this is fine for a 1.5A rated output.
![Load%20sweep%2014.6VQC12V](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/Load%20sweep%2014.6VQC12V.png)
12V output with high input voltage can deliver exactly 1.7A with stable output voltage.
![Voltage%20sweep%202AQC5V%20input%20current](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/Voltage%20sweep%202AQC5V%20input%20current.png)
In this curve I sweep voltage from 24V and down with a output load of 2A.
![Voltage%20sweep%202AQC5V](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/Voltage%20sweep%202AQC5V.png)
The 5V output is stable down to about 6V input.
![Voltage%20sweep%201.5AQC9V](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/Voltage%20sweep%201.5AQC9V.png)
9V output can be maintained down to about 10V input with a 1.5A load
![Voltage%20sweep%201.0AQC12V](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/Voltage%20sweep%201.0AQC12V.png)
12V output works down to about 13V with 1A load, I could not get it started at 24V input with 1.5A load.
![10ohmQC5V](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/10ohmQC5V.png)
At 5V 0.5A the noise is 8mV rms and 117mVpp
![5ohmQC5V](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/5ohmQC5V.png)
At 5V 1A the noise is 13mV rms and 118mVpp
![2ohmQC5V](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/2ohmQC5V.png)
At 5V 2.5A the noise is 12mV rms and 136mVpp.
![10ohmQC9V](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/10ohmQC9V.png)
At 9V 0.9A the noise is 13mV rms and 111mVpp
![10ohmQC12V](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/10ohmQC12V.png)
At 12V 1.2A the noise is 17mV rms and 230mVpp, generally very low noise.
PD output
![Load%20sweep%2014.6VPD5V](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/Load%20sweep%2014.6VPD5V.png)
USB-C PD with 5V output and high input voltage can deliver about 3.5A
![Load%20sweep%2014.6VPD9V](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/Load%20sweep%2014.6VPD9V.png)
At 9V the output is limited to a bit above 2.6A
![Load%20sweep%2014.6VQC12V](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/Load%20sweep%2014.6VQC12V.png)
12V can deliver 1.7A
![Load%20sweep%2011.6VPD12V](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/Load%20sweep%2011.6VPD12V.png)
12V output with low input voltage, the output voltage sags at higher current, but handles the rated 1.5A fairly well (About 10.5V).
![Voltage%20sweep%202APD5V%20input%20current](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/Voltage%20sweep%202APD5V%20input%20current.png)
![Voltage%20sweep%202APD5V](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/Voltage%20sweep%202APD5V.png)
5V with 2A load works down to about 6V.
![Voltage%20sweep%202APD9V](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/Voltage%20sweep%202APD9V.png)
9V output works down to about 10V with 2A output.
![Voltage%20sweep%201.5APD12V](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/Voltage%20sweep%201.5APD12V.png)
12V works down to about 13V, but do not maintain 12V output with 24V input.
![10ohmPD5V](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/10ohmPD5V.png)
At 5V 0.5A the noise is 7mV rms and 191mVpp
![5ohmPD5V](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/5ohmPD5V.png)
At 5V 1A the noise is 10mV rms and 205mVpp
![2ohmPD5V](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/2ohmPD5V.png)
At 5V 2.5A the noise is 7mV rms and 143mVpp
![10ohmPD9V](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/10ohmPD9V.png)
At 9V 0.9A the noise is 11mV rms and 207mVpp
![10ohmPD12V](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/10ohmPD12V.png)
At 12V 1.2A the noise is 12mV rms and 214mVpp, PD do also have very low noise.
Full load
![Load%20test%203.0A](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/Load%20test%203.0A.png)
Loading both outputs with rated load did not work for long, the PD output reduced the output voltage, probably due to heat.
![Load%20test%202.4A](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/Load%20test%202.4A.png)
Reducing the PD load to 2.4A fixed that, here I could run for 1 hour.
The temperature photo below are taken between 30 minutes and 60 minutes into the one hour test.
![Temp5525](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/Temp5525.png)
M1: 65.8°C, HS1: 75.6°C
![Temp5526](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/Temp5526.png)
M1: 61.7°C, HS1: 77.4°C
The charger gets rather warm, performance will depend on how well the socket can cool it.
Tear down
![DSC_9486](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/DSC_9486.jpg)
Both the enclosure and the front is in metal.
![DSC_9487](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/DSC_9487.jpg)
The front has the two usb connectors and a LED
![DSC_9490](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/DSC_9490.jpg)
The sides is for 0V power connection.
![DSC_9492](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/DSC_9492.jpg)
The bottom is for 12V power connection.
![DSC_9489](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/DSC_9489.jpg)
On the side with the USB-C connector is the PD circuit.
![DSC_9491](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/DSC_9491.jpg)
And on the side with the normal USB connector is the QC circuit.
![DSC_9493](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/DSC_9493.jpg)
Getting inside the electronic circuit required a bit of violence, the circuit boards are both soldered and (weakly) glued together.
![DSC_9496](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/DSC_9496.jpg)
The QC output is one chip, one inductor and a large capacitor. There is also a few supporting capacitors and resistors.
At the current input is a fuse and a smd ferrite working as an inductor, they got damaged when I took it apart.
![DSC_9497](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/DSC_9497.jpg)
![DSC_9499](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/DSC_9499.jpg)
Again it is a very simple circuit and very similar to the QC circuit, but this time for PD (U2: IP6510).
![DSC_9500](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/DSC_9500.jpg)
![DSC_9501](https://lygte-info.dk/pic/USB%20from%2012V/21%20Hoco%202x18W%20PD%20car%20Z20A/DSC_9501.jpg)
Being a 12V device there is no need to test with high voltages.
Conclusion
This car charger works fine on both PD and QC output, as expected for a charger without boost converter the 12V mode voltage will depend on the input voltage, this charger has a fairly low voltage drop. The QC output has automatic coding with a lot of modes, making the charger work with many different phones. The noise is low. The charger has some problems with 24V.
I will call it a fairly good charger.
Notes
Index of all tested USB power supplies/chargers
Read more about how I test USB power supplies/charger