Dynex Semiconductor has announced the development of a new 450A, 650V Gallium Nitride (GaN) half-bridge power module, designed to deliver ultra-fast switching performance, high efficiency, and enhanced thermal management for demanding power conversion applications.

As industries seek to improve energy efficiency, reduce system size, and increase power density, wide bandgap semiconductor technologies are becoming increasingly important. While silicon carbide (SiC) has enabled significant improvements in power conversion, GaN technology offers additional advantages in applications where switching speed and efficiency are critical.

Why Gallium Nitride (GaN)?

Gallium Nitride High Electron Mobility Transistors (HEMTs) offer several inherent benefits compared to traditional silicon IGBTs and silicon carbide MOSFETs:

• Faster switching speeds, reducing switching losses and enabling higher operating frequencies.
• Zero reverse recovery losses due to the absence of an intrinsic body diode.
• Lower gate charge and output capacitance, requiring less drive energy and improving overall efficiency.
• Higher power density through reduced passive component requirements and improved thermal performance.

These characteristics make GaN particularly attractive for applications requiring compact, highly efficient power conversion systems.

Advanced Module Design

The new Dynex 450A, 650V GaN module combines advanced semiconductor technology with innovative packaging techniques to maximise performance.

Key features include:

• 450A continuous current capability.
• 650V blocking voltage.
• Half-bridge inverter configuration.
• Planar PCB embedding technology.
• Double-sided cooling architecture.
• Ultra-low commutation loop inductance below 1nH.

The module's planar PCB embedding technology minimises parasitic inductance within the power loop, enabling exceptionally fast and stable switching performance.

The flexibility of the embedding process also allows close matching and balancing of parallel GaN devices, helping to achieve consistent switching behaviour across the module.

Optimised Thermal Management

To support high-power operation, the module incorporates a double-sided cooled planar package structure. This approach minimises thermal resistance between the semiconductor junction and cooling system, allowing higher power densities while maintaining reliable operating temperatures.

The combination of low electrical parasitics and advanced thermal performance enables the module to operate efficiently in demanding environments where both power density and reliability are critical.

Applications

The 450A, 650V GaN module is suitable for a wide range of high-performance power conversion applications, including:

• Electric vehicle power systems
• Renewable energy inverters
• Energy storage systems
• Data centre power supplies
• Fast charging infrastructure
• Industrial power conversion
• High-frequency power electronics

Enabling the Next Generation of Power Electronics

As power conversion systems continue to evolve towards higher efficiency, increased power density, and reduced environmental impact, GaN technology is expected to play a key role in enabling future innovation.

The development of the Dynex 450A, 650V GaN module represents another step towards delivering advanced semiconductor solutions capable of meeting the growing demands of modern power electronics applications.

FAQs

Q: What is a GaN power module?

A: A GaN power module is a high-performance power conversion device that uses Gallium Nitride (GaN) transistors to deliver faster switching speeds, lower power losses, and higher efficiency than conventional silicon technologies. By combining advanced GaN devices with low-inductance packaging and effective thermal management, GaN power modules enable more compact, energy-efficient power electronic systems for applications including renewable energy, electric vehicles, industrial power conversion, and data centres.