GaN技术杂谈

The increasing adoption of 800 V power distribution in AI data centers and industrial automation is creating a new challenge for power-conversion designers: how to convert high-voltage DC efficiently into the 6 V, 12 V and 48 Vrails required by modern loads while maintaining high power density.

A presentation by Michael de Rooij of Efficient Power Conversion (EPC) examines how a multi-stage Input Series, Output Parallel (ISOP) architecture can distribute the high-voltage input across several conversion modules, enabling low-voltage GaN FETs to be used on both the primary and secondary sides of multi-kilowatt isolated converters.

骆乾，“三代半食堂”创始人

PCIM Asia 2026 上，EPC 展示了面向 AI 处理器供电的 Gen 8 单片 GaN 功率级。

作为 EPC 面向下一代 AI 处理器侧高频多相 POL / IVR 场景开发的单片集成功率级，Gen 8 在同一 GaN 芯片上集成半桥功率开关、高速栅极驱动、自举电路（bootstrap）、电平移位与逻辑控制，并通过更低电荷、更高开关速度和更强过压承受能力面向 6 V 输入与 10 MHz 级运行。其系统意义不只是减少器件数量，而是缩小驱动回路寄生、降低噪声敏感性，并让控制侧采用更适合大量数字功能的高速工艺，从而支持更高相数和更紧凑的处理器侧布局。

随着人工智能（AI）工作负载的快速增长，现代数据中心的电力需求正在发生巨大变化。随着英伟达（NVIDIA）Vera Rubin等GPU平台推动机架功率从200 kW向1 MW迈进，传统的48 V母排配电方式由于巨大的导通损耗，在物理实现和经济效益方面均变得不切实际。在电流到达服务器电路板之前，48 V母排中的电流就可能超过4,000 A。

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GaN FET 与任何其他类型的晶体管一样，在开关过程中会耗散 功率 ，并以热量的形式表现出来。如果超过特定的温度限制，可能会损坏这些器件。因此，热管理是转换器设计中的重要环节。

作者：Maurizio Di Paolo Emilio，《Data Centre Digest》特约编辑

氮化镓（GaN）正在进入一个新的发展阶段。在激光雷达、卫星电源、快速充电器和AI电源供电等应用中确立了自身地位之后，这项技术正越来越多地迈向低电压、大电流应用领域，而在这些应用中，开关速度、低导通损耗和功率密度至关重要。

Encouraging developers to design high-performance Class-D audio amplifiers leveraging GaN FETs, Efficient Power Conversion (EPC) has launched the new EPC9192 reference design, enabling high power and high efficiency Class-D audio amplifiers in a modular design. audioXpress reviews the EPC9192 to confirm the performance capabilities of EPC’s 200V, EPC2307 eGaN FETs in a ground-referenced, split dual supply single-ended (SE) design, rated to deliver 700W per channel into a 4Ω load.

Qian Luo, Author, WBG TechnoBite

In humanoid robot wrists and dexterous hands, as well as compact drone propulsion systems, motor drives are moving from external controller boards into the actuator itself. At that point, the inverter is no longer an independent unit that simply delivers three-phase current to the motor; it must share a tightly constrained space with the motor, position sensor, mechanical structure, and thermal path.

This changes the design priorities for compact motor drives. Continuous current and torque capability certainly depend on the power devices, but where the DC-link capacitors can be placed, whether heat can be transferred into the housing or airflow, and how sensing and protection signals are routed all shape the final system performance.

As AI infrastructure, humanoid robots, drones, autonomous machines and space systems push power electronics toward higher efficiency and power density, gallium nitride (GaN) is moving into increasingly demanding applications. At PCIM Asia 2026 in Shenzhen, Efficient Power Conversion (EPC) will showcase its latest GaN technology while offering a preview of where the company believes the technology is heading next. The event, taking place August 26–28, will be particularly relevant for designers working on AI power delivery and intelligent motion systems. EPC will demonstrate its GaN portfolio across the power-conversion chain, from 800 VDC distribution to point-of-load conversion, while its roadmap points toward two developments with potentially broader implications: Gen 8 GaN for ultra-high-frequency, low-voltage power conversion and Trinity, EPC’s approach to highly integrated GaN motor drives.