Efficient Power Conversion (EPC) has begun mass production of the EPC2370, an 18V gallium nitride (GaN) field-effect transistor (FET) designed to improve efficiency and power density in next-generation AI server power supplies. GaN FETs are semiconductor switches that generally outperform traditional silicon-based transistors in efficiency and switching speed, making them well suited to power conversion in demanding applications. The EPC2370 has a transient voltage rating of 22V, meaning it can briefly withstand voltage spikes up to that level, which lets it replace traditional MOSFETs rated as high as 25V.
The chip is designed for a broader shift happening in AI power infrastructure, as systems move toward 800VDC power distribution and adopt compact, high-density intermediate bus converters running at multi-kilowatt power levels and switching frequencies of 1 MHz. Built on EPC's seventh-generation GaN platform, the EPC2370 delivers a continuous current rating of 101A, described as a benchmark figure, along with a typical on-resistance of just 0.28 mΩ (a measure of how much the transistor resists current flow when switched on), a gate charge of 26 nC (indicating how much energy is needed to switch the transistor), and very low switching losses. It comes in a compact 3.3mm x 3.3mm thermally enhanced package with cooling on both sides, called PQFN. Together, these characteristics let designers maximize efficiency, shrink the size of converters and their associated magnetic components, and meet demanding thermal management requirements.
Jason Zhang, vice president of DC-DC marketing and system engineering at EPC, said the rapid evolution of AI infrastructure requires power switches that optimize both conduction performance (how efficiently current flows through the device when on) and switching performance (how efficiently it turns on and off). He said that together with EPC's recently released primary-side GaN switches, the EPC2305, EPC2367, and EPC2361, the EPC2370 was specifically developed for 6V output, high-current synchronous rectification, a technique for efficiently converting AC to DC current, enabling next-generation high-density, high-current power supplies where minimizing the combination of resistance and gate charge, sometimes called the R×Q figure of merit, is critical to performance.
The EPC2370 is optimized for center-tapped synchronous rectification in both 48V-to-6V and 800V-to-6V power converters. Its 18V continuous and 22V transient voltage ratings provide enough margin for reliable operation, while enabling peak efficiencies of 98% and full-load efficiencies of 97% in high-density power modules. Beyond AI servers, EPC says the EPC2370 is also well suited for high-current DC-DC converters used in high-performance computing, telecommunications infrastructure, and advanced industrial power systems.
To support customers evaluating and developing products with the new chip, EPC is also offering the EPC90168 evaluation board. Measuring 2 inches by 2 inches, the board features two EPC2370 GaN FETs configured in a half-bridge arrangement, along with all the supporting components and an optimized circuit layout designed to maximize switching performance. It also includes multiple probe points to make it easier to measure waveforms and evaluate efficiency.
The EPC2370 is now available through EPC's global distribution network, including Digi-Key and Mouser, with production ramping up to meet growing demand from AI computing, server power supplies, telecommunications infrastructure, industrial systems, and other high-performance low-voltage power applications. The chip is priced at $2.52 each in quantities of 1,000 units, while the EPC90168 evaluation board is available for $260.
