5V 1A-2.1A USB car charger pink Nokoko KO-20
I got it from ebay dealer: katcam
- Safe and durable.
- Fashion Design:No matter what color of your car,according to your preferences can be match the car, leading the fashion trends.
- Intelligent Protection: Intelligent power output, smart adjustment protect your cell phone from overcharge.
- Compatible smartphone and tablet PC, Plenty of power can be charge for cell phone and tablet PC.
- Input: 12V
- Output: 5V 2.1A (max)
Like many other cheap Chinese chargers it is delivered in a plastic bag inside a envelope without any instructions or specifications sheet.
- Power consumption when idle is 3.8mA from 12V and 3.3mA from 24V
- Both USB outputs is coded as DCP
- USB outputs are in parallel.
- Weight: 19.5g
- Length: 64mm
- Diameter: 28.3mm
I started with the 2.1A output and it could deliver 0.85A with a nearly flat car battery.
With a full car battery it is the same 0.85A, way below the rated 2.1A
I forgot to read on the charger and also gave it a 24V test, I got about 0.8A before it shorted.
This means no 1 hour test and IR photos, but I did the noise measurements before the load sweep this time:
Noise at 0.5A output is 12mV rms and 127mVpp
Noise at "1A" output is 30mV rms and 353mVpp. The charger is overloaded and the output voltage is well below 5V.
I could not see how to open it and the red cover would not more so I cut it. It looks like I could just have popped the front off!
This is a very simple design with a switcher IC, a inductor and a rectifier diode.
With the input capacitor rated at 25V volt it is not usable in a 24V car system, where the voltage can reach 30V.
The spring is rather short because it got overheated, probably when the chip shorted.
The chip used is a AD85063D, it is designed for car USB chargers and is rated for 24V car usage (Maximum input voltage 40V).
This is a rather bad car charger with below 1A output and no fuse or thermal protection.
The charger was supplied by a reader for review.
Read more about how I test USB power supplies/charger
Compare car chargers and other DC supplied chargers