Cambridge GaN Devices Ltd (CGD) has introduced a 650V GaN IC for automotive powertrains, designed to improve inverter efficiency and directly extend electric vehicle range.
Device architecture and parallel operation
The ICeGaN interface solves a persistent challenge in GaN-based powertrain design: balancing multiple devices in parallel. Traditional approaches require matched devices or external balancing components, adding cost and complexity. CGD’s solution inherently balances parallel operation without selection or additional circuitry.
The device integrates an auxiliary transistor in the gate interface that filters parasitic noise from the driver loops, providing built-in noise immunity. This simplifies the interface with standard gate driver ICs and enables straightforward parallel configurations with larger die sizes.
Performance gains and thermal benefits
With an on-resistance of just 9mΩ, the new ICeGaN device delivers significantly lower conduction and switching losses across the EV powertrain. This reduces the thermal management burden, allowing smaller heatsinks and simpler cooling strategies.
Higher-frequency switching capability enables downsizing of passive components in the propulsion system. The result is a smaller, lighter inverter that directly contributes to increased vehicle range — a critical factor in sustaining consumer adoption of EVs over internal combustion engine (ICE) powertrains.
Integrated sensing and diagnostics
The ICeGaN interface includes on-chip temperature sensing for system-level control and diagnostics. This improves powertrain reliability by enabling real-time thermal monitoring and fault detection. Automotive OEMs and tier-one suppliers can leverage this feature to meet stringent safety and durability requirements.
Manufacturing and supply chain
CGD, a fabless company spun out of the University of Cambridge in 2016, is manufacturing the devices in partnership with GlobalFoundries (GF). This collaboration strengthens CGD’s supply chain resilience and supports volume production for automotive customers. A 9mΩ prototype is currently sampling, and CGD is working with multiple automotive OEMs and tier-one suppliers on ICeGaN-based powertrain designs.
The company has already demonstrated a multi-level GaN 800Vdc inverter capable of over 100kW peak and 75kW continuous power, addressing high-voltage electrification and motor-drive applications.
Looking ahead
CGD’s ICeGaN device represents a practical step toward mainstream adoption of GaN in automotive powertrains. By simplifying parallel operation, reducing losses, and integrating diagnostics, it addresses the core engineering barriers that have limited GaN deployment in EVs. As automotive developers push for higher efficiency and lower system cost, ICeGaN is positioned to become a key enabler of next-generation electric drivetrains.
