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.
