EPC GaN FETs Enable 4 kW High-Efficiency Buck-Boost Converter Reference Design - The National Law Review

EPC's 4kW GaN Buck-Boost reference design is not a product update—it is a structural threat to SiC's dominance in industrial power conversion. Technical ripple: 4kW has been SiC MOSFET territory, where Wolfspeed and STMicroelectronics hold commanding share. By targeting Buck-Boost topology, EPC aims squarely at data-center 48V bus conversion and three-phase industrial drives—a combined market exceeding $12B by 2025. The reference-design strategy is the real weapon: once a customer commits EPC FETs into a schematic, PCB layout, gate drivers, and thermal design all lock in, making switching costs exponential. Supply-chain exposure: EPC's GaN-on-Si process depends on TSMC (Taiwan, China) for 0.25μm fabrication. While not a leading-edge node, capacity allocation remains vulnerable to geopolitical friction. Any expansion of US export-control scope would compress EPC's production flexibility. Competitive dynamics: The true adversary is not Navitas (carved out in automotive) but Infineon's CoolSiC portfolio, which owns entrenched channel relationships in the 4–10kW industrial segment. Direct confrontation is inevitable within two quarters. 12–24 month outlook: GaN will shed its "low-voltage, low-power" identity and penetrate the 3–10kW industrial tier. SiC's "efficiency ceiling" narrative will erode, and pricing power in power semiconductors will shift from the materials layer to the design layer.