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GaN PD Chargers - Unleashing High-Efficiency Charging

Views: 38     Author: Site Editor     Publish Time: 2023-05-18      Origin: Site

USB-PD Charging Technology

USB Power Delivery (USB-PD) technology is a universal standard used to charge or supply power to devices equipped with a USB-C port. This includes devices with higher power requirements such as laptops, printers, hard drives, and smartphones with larger battery capacities. USB-PD chargers and adapters are capable of providing the specific power levels requested by the connected devices.

Communication between the power source and the device occurs through the USB-PD protocol. The device, or "sink," communicates its power requirements to the power source, which adjusts the charging voltage and current accordingly. This allows for flexible and efficient charging of a wide range of devices using USB-PD chargers or power adapters.USB-PD Charging Technology

GaN Charger Technology

GaN charger technology, unlike traditional silicon-based transistors, GaN charger  products utilize gallium nitride (GaN) transistors. These GaN transistors possess higher critical electrical fields, resulting in exceptional specific dynamic on-state resistance and reduced capacitances compared to silicon MOSFETs. This makes GaN HEMTs ideal for applications requiring high-speed switching.

One of the key advantages of GaN transistors is their ability to operate with reduced dead-times, leading to improved efficiency and better thermal management. By enabling high switching frequencies, GaN technology allows for a reduction in the size and weight of passive components, thereby enhancing overall power density. As a result, chargers and adapters utilizing GaN technology can be made smaller and lighter.

The advantages of using GaN in chargers

  1. Higher Efficiency: GaN (gallium nitride) transistors have lower on-state resistance and reduced capacitances compared to traditional silicon-based transistors. This leads to improved efficiency, resulting in less power loss during the charging process.

  2. Faster Charging: GaN chargers are capable of high-speed switching, allowing for faster charging times compared to conventional chargers. The reduced dead-times in GaN transistors enable efficient power delivery to the connected device.

  3. Smaller and Lighter Design: GaN technology allows for higher switching frequencies, which results in a reduction in the size and weight of passive components. This enables the development of smaller and more compact charger designs without compromising power output.

  4. Improved Power Density: By shrinking the volume of passive components, GaN chargers achieve higher power density. This means that more power can be delivered within a smaller form factor, making GaN chargers ideal for portable devices where space is limited.

  5. Better Thermal Management: GaN transistors exhibit superior thermal characteristics compared to traditional silicon-based transistors. They generate less heat during operation, resulting in improved thermal management and increased overall charger reliability.

In summary, GaN chargers offer higher efficiency, faster charging times, smaller form factors, improved power density, and better thermal management compared to conventional chargers. These advantages make GaN an attractive technology for powering various electronic devices.

Disadvantages of GaN chargers

While GaN chargers have numerous advantages, there are also a few disadvantages to consider:

  1. Cost: GaN technology is still relatively new and evolving, which can result in higher production costs compared to traditional silicon-based chargers. However, as the technology advances and becomes more widely adopted, the cost is expected to decrease over time.

  2. Sensitivity to Voltage Spikes: GaN transistors can be more sensitive to voltage spikes or electrostatic discharge (ESD) events compared to silicon-based transistors. Adequate protection measures need to be implemented to ensure the longevity and reliability of GaN chargers.

  3. Complexity of Design: The design and implementation of GaN chargers can be more complex compared to traditional chargers. GaN technology requires careful consideration of factors such as switching frequencies, heat dissipation, and circuit layout to optimize performance and efficiency.

  4. Limited Availability: GaN chargers may have limited availability in the market compared to silicon-based chargers. This can be attributed to the relatively new nature of the technology and the slower adoption rate by manufacturers. However, availability is expected to increase as GaN technology becomes more prevalent.

It's important to note that while there are disadvantages associated with GaN chargers, ongoing advancements in the technology are addressing these limitations. As the industry continues to develop and refine GaN-based charging solutions, it is likely that these drawbacks will be minimized or overcome.

At present, there are various kinds of GaN PD chargers, The charging price of gallium nitride chargers is higher than other ordinary chargers. Compared with ordinary chargers, gallium nitride chargers are much more expensive to develop/manufacture, and the price is naturally higher than ordinary chargers. For example, single-port gallium nitride chargers and multi-port gallium nitride chargers also vary in price due to different costs. But it has features of high performance and convenience, and is as well as more cost-effective than a common PD charger. which is suitable for daily device charge needs.

Andar's 35W GaN A+C PD charger can contain multiple protocols with high efficiency and small size.






Total Power



100-240V 50/60Hz


USB-A: 5V3A, 9V2A, 12V1.5A

USB-C: 5V3A, 9V3A, 12V2.5A, 15V2A, 20V1.75A

USB-A+USB-C: 5V 3.6A

Andar's GaN PD chargers are really excellent in the market. Andar was established in 2012 and enjoys convenient access to the airport pier. In the same year, the company also established its American branch. Andar specializes in the design, production, and sale of switches, smart sockets, multiport portable power adapters, and other integrated power panels. With years of professional expertise and a strong skill set, they offer comprehensive power solutions. Their products find extensive applications in domestic appliances, digital accessories, electric power tools, and office facilities.

GaN chargers

What are the applications of gallium nitride in addition to the charger?

There are three more important directions:

  • l Optoelectronic field: like common LED and lidar and VCSEL sensors.

  • l Power field: common power devices such as fast charging head and frequency converter.

  • Radio frequency: 5G base station, radar, low orbit satellite and so on.

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