What is a Gallium Nitride Power Supply？

December 27, 2021

Now more and more chargers are starting to be replaced by gallium nitride. Gallium nitride chargers seem to be small in size, but the power is generally large, and they can charge mobile phones, tablets, and even laptops. So what is gallium nitride and what are the advantages of gallium nitride chargers, the following is a simple analysis.

1. What is gallium nitride
Gallium nitride (GaN) is a compound of nitrogen and gallium with specific semiconductor characteristics. It was used in light-emitting diodes in the early days. It belongs to the same periodic group of elements as commonly used silicon, with high hardness and high melting point, high stability. Gallium nitride material is an important semiconductor material for the development of microelectronic devices. It has the characteristics of wide band gap and high thermal conductivity. It is used in chargers, mainly integrating gallium nitride MOS tubes, which can be adapted to small transformers and high-power devices. efficient.

2. Application development of GaN charger
Compared with the continuous upgrading of mobile phones and tablets. This time the application of new GaN technology has given digital manufacturers a wave of enthusiasm. Mobile phone brands and third-party accessory vendors are launching their own gallium nitride chargers. Previously, there was anker green-linked oppo millet. The 65W gallium nitride charger of the fast charge agreement can handle all mobile phones, tablets and notebooks.

3. Advantages and disadvantages of GaN chargers
First of all, we must explain that compared with ordinary chargers, GaN chargers only use different materials.

Advantages: small size, higher safety

Compared with ordinary semiconductor silicon materials, gallium nitride has a wider band gap and good heat conduction, which can match smaller transformers and high-power inductors, so gallium nitride chargers have the advantages of small size, high efficiency, and safety. . In order to achieve faster charging speeds for flagship mobile phones and tablets of major brands, the charger power is relatively large, and 60W chargers are very common. The larger charging power means that the size of the charger is also increasing, and the increasing power will cause serious heat generation.

After switching to gallium nitride technology, the components of the charger can be smaller, and the size of the charger can be greatly reduced; at the same time, the gallium nitride charger can also maintain a high-efficiency and low-temperature working condition with better safety

Disadvantage: high cost

The main disadvantage of GaN chargers is their high cost. As a new third-generation compound, gallium nitride requires high synthesis environment. In terms of manufacturing process, gallium nitride is not liquid, and the traditional Czochralski method of single crystal silicon cannot be used to pull out single crystals. It is synthesized purely by gas reaction. It takes half an hour to heat metal gallium in the airflow over 1000 degrees to form powdered gallium nitride, so the cost of gallium nitride chargers is higher, and the corresponding gallium nitride chargers on the market are also much more expensive than ordinary chargers.

Best Regards,

Mandy Huang

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