About GAN Technology for Charger

What is gallium nitride, a molecular GaN, a compound of nitrogen and gallium, is a direct bandgap semiconductor that has been used in light-emitting diodes since 1990. Gallium nitride has a wide energy gap of 3.4 eV and can be used in high power, high-speed optoelectronic components. It has the characteristics of large forbidden bandwidth, high thermal conductivity, high-temperature resistance (can work above 200 degrees high temperature), radiation resistance, acid and alkali resistance, high strength and high hardness. With the update of the technology, GaN is currently being used. Widely used in consumer electronics and other fields, the charger is one of them.

Why is the charger using gallium nitride?

The third generation of semiconductor materials, compared to SiC, GaN is more favored mainly by two factors:

(1) GaN has shown greater potential in cost control. At present, mainstream GaN technology manufacturers are developing devices based on Si as a substrate to replace expensive SiC substrates. Some analysts predict that the cost of GaN MOSFETs will be comparable to that of traditional Si devices by 2019, and GaN technology is a very attractive market opportunity for suppliers to provide their customers with the current semiconductor process materials that may not be available. Enterprise performance.

2) Furthermore, since the GaN device is a planar device, it is compatible with existing Si semiconductor processes, which makes it easier to integrate with other semiconductor devices.

The most intuitive experience of a charger using GaN gallium nitride components is that it is small in size and light in weight, and has a greater advantage in heat generation and efficiency conversion than an ordinary charger.

They can dramatically increase the efficiency of traditional power supplies, reduce power consumption, and reduce the size of power supplies by 80% and weight by 70%.

Taking a laptop adapter as an example, when a silicon carbide power device is used, the size of the power adapter of the existing notebook computer will change from a brick to a matchbox, and the efficiency will increase from 90-95% to 97-99%. Above, the loss is reduced by at least half.

Which models are the current Gan chargers on the market?

In 2019, most of the GaN GaN chargers on the market support USB PD fast charging. Most of them are 27W, 30W, and 45W. The design is mainly divided into round and flat. The volume is very small and thin.

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