In our fast-paced modern life, electronic devices have become part of our body, and the technology of the chargers that power them is undergoing a quiet but profound revolution. Among them, the emergence of Gallium Nitride charger is undoubtedly the brightest star in this revolution. It is not only a simple upgrade of the traditional charger, but also a comprehensive innovation from material to architecture.

I. What is gallium nitride charger?

Essentially, Gallium Nitride charger is a kind of power adapter using Gallium Nitride as the core semiconductor material.

Core material: Gallium Nitride

Gallium nitride is a new type of wide-bandwidth semiconductor material. It has superior physical properties compared to silicon, which is used to make the switching tubes (e.g. MOSFETs) in conventional chargers.

Think of it like this: on a highway (circuit), silicon is like a regular state highway, while gallium nitride is a wider, flatter highway with a higher speed limit. Electrons flow through Gallium Nitride with less resistance, faster, and with great efficiency.

Technical Background:

Gallium nitride is not a newly discovered technology; it has long been widely used in LED lighting, radio frequency communications, and the military. In recent years, with the maturity of the material growth and chip manufacturing process and cost reduction, it has been able to “fly into the common people's home”, used in consumer power products.

Simply put, gallium nitride charger is the use of better performance of gallium nitride chip, instead of the traditional silicon-based chip, so as to create a smaller, more efficient and more powerful charger.

Second, the core features and advantages of gallium nitride charger

The innate advantages of gallium nitride material give the charger a series of subversive features.

1. Compact size and extremely high power density

This is the most intuitive advantage of gallium nitride chargers.

Principle: Gallium Nitride has a much higher electron saturation mobility than silicon, which means it can operate at higher switching frequencies. The high switching frequency allows essential passive components in the circuit to be made smaller, especially transformers and capacitors. As a result, a Gallium Nitride charger can be 30% - 50% smaller than a conventional silicon based charger with the same power output.

Advantage: A conventional 65W laptop charger can weigh 300-400 grams and be bulky. A GaN charger with the same power can easily be the size of a cell phone charger, and the weight is greatly reduced, which greatly improves portability.

2. Higher efficiency and lower heat generation

Principle: Gallium Nitride devices have extremely low resistance (Rds(on)) when on, and lower switching losses. Generally speaking, it “wastes” less energy when converting power, and most of the power is effectively delivered to the device, which naturally generates less waste heat.

Advantage embodiment:

Energy saving: More in line with the concept of green environmental protection.

Better thermal management: Low temperature operation not only improves the safety of use, but also extends the life of the charger's internal components and ensures the stability of high power output for a long period of time.

3. Powerful, supports multiple fast charging protocols

Gallium Nitride technology provides a solid physical foundation for high power output.

Principle: Thanks to its excellent high-voltage and high-temperature resistance, GaN devices can easily cope with high-power scenarios. This enables manufacturers to integrate complex and efficient multiplexed voltage conversion circuits and intelligent protocol recognition chips in a compact body.

The benefits show:

Multiple Outputs: Common Gallium Nitride chargers are equipped with 2 or more USB-C/A ports, enabling high-speed charging of multiple devices at the same time, such as laptops, cell phones, tablets, headphones and more.

Full protocol support: High-end GaN chargers are usually compatible with PD, QC, PPS, AFC, SCP, FCP and other mainstream fast charging protocols, which can intelligently identify the type of device and provide the best charging voltage and current to realize “one head to charge all”. 4.

4. Better heat dissipation and more stable operation

Although Gallium Nitride itself generates low heat, excellent design will further enhance heat dissipation. Due to the size advantage, manufacturers can use materials with higher thermal conductivity (e.g. metal heat sinks, thermal gel) and design more reasonable air ducts to ensure fast and even heat dissipation.