Dynex Semiconductor has announced the development of a new 450 A, 650 V gallium nitride (GaN) half-bridge power module designed to deliver ultra-fast switching performance, high efficiency, and advanced thermal management for next-generation power conversion systems.
As demand grows for higher energy efficiency, increased power density, and more compact power electronics, wide-bandgap semiconductor technologies are becoming increasingly important. While silicon carbide (SiC) devices have driven significant improvements in high-power conversion systems, gallium nitride (GaN) technology offers additional advantages in applications where switching speed and efficiency are critical performance drivers.
The new module is based on Gallium Nitride High Electron Mobility Transistors (HEMTs), which offer several key advantages over conventional silicon IGBTs and silicon carbide MOSFETs.
GaN devices support significantly faster switching speeds, enabling operation at higher frequencies while reducing switching losses. Unlike silicon and SiC devices, GaN HEMTs do not contain an intrinsic body diode, eliminating reverse recovery losses and improving efficiency during high-frequency operation.
Additional benefits include lower gate charge and output capacitance, which reduce gate-drive power requirements and improve overall system efficiency. These characteristics allow designers to shrink passive components such as inductors and capacitors, contributing to higher power density and more compact system architectures.
Dynex’s new power module combines GaN semiconductor technology with an advanced packaging approach designed to minimize electrical parasitics and maximize performance.
Key specifications include:
- 450 A continuous current capability
- 650 V blocking voltage
- Half-bridge inverter configuration
- Planar PCB embedding technology
- Double-sided cooling architecture
- Ultra-low commutation loop inductance below 1 nH
A key differentiator is the use of planar PCB embedding technology, which significantly reduces parasitic inductance within the power loop. Maintaining loop inductance below 1 nH enables exceptionally fast switching while minimizing voltage overshoot, ringing, and electromagnetic interference (EMI).
The embedding process also facilitates precise matching and balancing of parallel GaN devices, helping ensure uniform switching characteristics and improved module reliability under high-current operation.
To support high power density and continuous operation, the module incorporates a double-sided cooling architecture. By providing thermal paths on both sides of the semiconductor devices, the design minimizes junction-to-coolant thermal resistance and improves heat extraction efficiency.
This enhanced thermal management capability enables higher power throughput while maintaining safe operating temperatures, helping improve both system reliability and long-term performance.
The combination of ultra-low electrical parasitics and efficient thermal management allows the module to operate effectively in applications where both switching speed and power density are critical requirements.
The 450 A, 650 V GaN module is intended for a broad range of high-performance power conversion systems, including:
- Electric vehicle power electronics
- Renewable energy inverters
- Battery energy storage systems (BESS)
- AI and data center power supplies
- Fast charging infrastructure
- Industrial power conversion equipment
- High-frequency power electronics platforms
The development highlights the growing role of GaN technology in medium-voltage, high-current power conversion applications. While GaN has traditionally been associated with lower-power and high-frequency systems, advancements in packaging, thermal management, and device integration are enabling its expansion into increasingly demanding industrial and infrastructure applications.
By combining high current capability, low inductance packaging, and double-sided cooling, Dynex’s new 450 A, 650 V GaN module demonstrates how wide-bandgap technologies can support the industry’s push toward higher efficiency, greater power density, and more compact power conversion architectures.
As electrification, renewable energy deployment, AI infrastructure growth, and advanced industrial automation continue to accelerate, GaN-based power modules such as this are expected to play an increasingly important role in enabling the next generation of efficient power electronics systems.
Original – Dynex Semiconductor