What are the advantages of GaN chargers and ordinary chargers?

Sajjad Hussain
Oct 11 · 6 min read
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In recent years, the gallium nitride PD fast charging chargers on the market have sprung up, and various brand manufacturers have launched their own gallium nitride USB PD chargers. But for ordinary users, there is very little knowledge about GaN chargers, and they don’t know the difference between ordinary chargers and GaN chargers, and why the appearance of GaN chargers is the same as that of ordinary chargers. The price is much higher than ordinary chargers? So, the author will share with you a 65W GaN charger under omthing, and explain the difference between the GaN charger and the ordinary charger through this charger.

What is gallium nitride?

Gallium nitride is a new type of semiconductor material, which has the characteristics of large forbidden band width, high thermal conductivity, high temperature resistance, radiation resistance, acid and alkali resistance, high strength and high hardness. It was widely used in new energy vehicles and rail transit in the early stage. , Smart grid, semiconductor lighting, new generation mobile communications, known as the third generation of semiconductor materials. As the cost of technological breakthroughs is controlled, gallium nitride is currently widely used in consumer electronics and other fields, and chargers are one of them. Simply put, GaN has a wider band gap. The wide band gap also means that GaN can withstand higher voltages than silicon and has better conductivity. In the same volume, GaN technology is used for charging. The output efficiency of the charger is higher than that of ordinary chargers. For example, a charging head made of gallium nitride material can achieve more output power when it is about the same size as an Apple 5W charger.

Unboxing

The design of this charging head packaging box is very simple, with silver as the main tone, with brand logo and product renderings on the surface. The way the box is opened is a bit special, using the “tear and pull” method to open, but I personally don’t like this way, the packaging cannot be reused after opening, and there is no chance to store the packaging.

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When you open the box, you can see that, in addition to the omthing PD 65W charging head, there is also a CC data cable in the package. The cable looks thick, it will not be deformed by pulling it with a hand, and the flexibility is also good. The maximum current is 5A. Fairly conscientious.

The size of the charging head is not very large, it can be easily put in your pocket, weighs about 115g, the whole is white, PC material, matte surface texture, I personally like this design, it is not easy to get fingerprints, and it can reduce daily use Wear and scratches. The whole is relatively simple, except for the top and bottom, there are no elements around, the logo is also placed above the top socket, one A and two C three output ports, unfortunately there is no power indicator, it is difficult to use to judge the working status of the charging head.

The omthing 65W GaN charger has rounded corners on the four sides of the waist, and there is no obvious “cutting” feeling, which increases the soft grip. The pins of the charger are foldable, which is very convenient for storage and carrying.

This charger has three output ports: 2 USB-C ports, 1 USB-A port, and all 3 ports support fast charging. You can charge 3 devices at the same time. Friends with multiple devices no longer need to prepare a charger for each product, which greatly reduces the socket occupancy rate. It is enough to bring one when traveling. It is worth noting that if it is used to charge the notebook, it needs to be connected to the C1 port, because only this port can reach 65W, so don’t connect it wrong.

The specific parameter information of the omthing 65W GaN charger is printed at the bottom, the specific parameters are as follows:

Input: AC 100–240V 50/60Hz 1.5A

Total power output: 65W Max

USB-C1 output: DC: 5V3A / 9V3A / 12V3A / 15V3A / 20V3.25A (65W Max)

USB-C2 output: DC: 5V2.4A / 9V2A / 12V2A / 15V3A / 20V2A (30W Max)

USB-AS output: DC: 4.5V5A / 5V3A / 9V2A / 12V1.5A (18W)

USBC1 + USB-C2 output: 45W + 18W (63W)

USBC1 + USB-A output: 45W + 18W (63W)

USBC1 + USB-A output: 5V3A (15W)

USBC1 + USB-C2 + USB-A output: 45W + 15W (60W)

Support charging protocol: QC2.0/QC3.0/PD3.0/PPS/Apple 2.4A/AFC/FCP/MTK PE/SCP, etc.

Charging experience

The author tested the USB-C1 output power through a professional charging tester. The omthing 65W GaN charger has a built-in intelligent power management chip, uses PD3.0 fast charging, and supports QC2.0, QC3.0, QC4.0, PPS, Apple2. Various fast charging protocols such as 4A, DCP, AFC, FCP, SCP, etc., tested by the instrument show that the C1 interface supports a maximum output of 63W, which is a bit different from the official 65W. The actual effect is still satisfactory and there is no false standard.

Next, test the USB-C2 output power. Through the tester, you can see that the maximum power of the C2 interface can reach 33W, which is larger than the official announcement. It is more than enough to charge the mobile phone, and there is no need to worry about the problem of insufficient charging head power in the future. Appeared.

The output power of the USB-A interface is slightly smaller than the power of the above two interfaces. The measured data is 25W. At present, the Apple iPhone 11 series has supported charging to about 24W, so it is faster than using the original 18W PD charger.

At present, I have an Apple mobile phone and a Huawei mobile phone. I used the charging head to charge the two mobile phones separately. The power of the Apple mobile phone can reach 10W when charging, and the charging power of the Huawei mobile phone can be stable at 3.7 when the charging power reaches 91%. Constant current charging around W, while the current output is stable, the curve fluctuation is small, there is no current instability, and the stable current can ensure the service life of the mobile phone battery. I am very satisfied with this.

In order to test the charging stability of the three ports, I used the omthing 65W GaN charger to charge three mobile phones at the same time. From the tester’s display, the three ports can be charged up to about 60W at the same time, and the charging current curve is also very stable. The current fluctuations are also very small. Touch the surface of the charging head with your hand and there is no hot phenomenon. It seems that this charger will be enough to go out in the future.

In short, I am very satisfied with the test results of the omthing 65W GaN charger. The small size has such a performance is indeed a bit surprising, and the built-in intelligent power management chip provides ten safety protections, overcurrent protection, overvoltage protection, and overload Protection, short circuit protection, overheating protection, leakage protection, undervoltage protection, backflow protection, trickle protection, surge protection, etc., allowing you to enjoy fast charging while charging is safer. If you want to consider starting a high-power charger recently, you should consider the omthing 65W GaN charger. I believe its performance will not disappoint you.

Disadvantages: 1. There is no charging indicator light, and the working condition of the charging head is not clear in use;

2. The 65W interface has no obvious logo, which is not very friendly to new users;

3. The power of the A port is a bit low, and it is not practical to reserve two C ports. After all, the users who use port A still account for the majority;

4. The white shell is dirt-resistant, and other colors are optional.

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