Efficient Power Conversion introduced the EPC91121 evaluation board at APEC 2026, showcasing its latest Gen-7 eGaN® technology for high-efficiency motor drive applications.
The EPC91121 is a compact three-phase inverter platform (79 mm × 80 mm) designed for rapid prototyping of advanced motor control systems in applications such as robotics, drones, industrial automation, and battery-powered tools. It supports input voltages from 18 V to 30 V and delivers up to 70 A peak output current, making it well-suited for 24 V systems.
At the core of the design is the EPC2366 40 V Gen-7 eGaN transistor, featuring ultra-low on-resistance of 0.84 mΩ. This enables high switching frequencies up to 150 kHz—significantly above traditional silicon-based solutions—allowing for reduced passive component size, lower switching losses, and improved system responsiveness.
The board integrates key inverter functions including gate drivers, current sensing, voltage and temperature monitoring, and housekeeping power supplies. High-bandwidth current sensing (±125 A) across all three phases, combined with voltage feedback, supports advanced motor control techniques such as field-oriented control (FOC) and space-vector PWM.
Additional features such as encoder and Hall sensor interfaces, multiple test points, and compatibility with control platforms from Renesas Electronics Corporation, Microchip Technology, Texas Instruments, and STMicroelectronicsenable seamless integration into existing development ecosystems.
From a market perspective, this release highlights the increasing role of GaN in low- to mid-voltage motor drives, where high switching frequency and efficiency translate directly into smaller, lighter, and more responsive systems. The availability of complete evaluation platforms further accelerates GaN adoption by reducing development complexity and time-to-market for next-generation electrified applications.
Original – Efficient Power Conversion