Alpha and Omega Semiconductor (AOS) has announced its full support for NVIDIA’s newly introduced 800 VDC power architecture, designed to power the next generation of AI data centers with megawatt-scale racks. The company’s portfolio of silicon carbide (SiC) and gallium nitride (GaN) power devices is strategically developed to meet the performance, efficiency, and density requirements of this next-generation infrastructure.

The transition from traditional 54 V to 800 VDC power distribution marks a major redesign in data center architecture. This shift reduces the number of power conversion stages, improves energy efficiency, lowers copper usage, and enhances system reliability. The new architecture also demands advanced wide bandgap semiconductor technologies capable of operating at higher voltages and switching frequencies while maintaining maximum efficiency.

Ralph Monteiro, Senior Vice President of Power IC and Discrete Product Lines at AOS, stated that the company is collaborating with NVIDIA to develop 800 VDC power semiconductors tailored for high-efficiency power delivery across all conversion stages—from AC-to-DC input to DC-to-DC rack-level conversion.

AOS’ wide bandgap expertise positions the company as a key technology enabler for this transition. Its SiC and GaN devices are optimized for each stage of the new 800 VDC architecture:

  • High-voltage conversion: AOS’s SiC devices, such as the Gen3 AOM020V120X3 and the topside-cooled AOGT020V120X2Q, support direct conversion from 13.8 kV AC grid input to 800 VDC, simplifying the power chain and improving system efficiency.
  • High-density DC-DC conversion: Inside the racks, AOS’s 650 V and 100 V GaN FETs, including the AOGT035V65GA1 and AOFG018V10GA1, enable compact, high-frequency converters that free up rack space and improve cooling performance.
  • Packaging innovations: The company’s stacked-die MOSFETs and GaN devices, such as the AOPL68801, share common footprints, allowing designers flexibility in cost and efficiency trade-offs in secondary-side power conversion.
  • Multiphase controllers: AOS also provides multi-rail 16-phase controllers for efficient voltage regulation from 54 V to 12 V and beyond, supporting AI processor power delivery.

By supplying key technologies for each conversion stage, AOS enables up to a 5 percent increase in overall power efficiency, a 45 percent reduction in copper usage, and significant improvements in thermal and maintenance performance.

AOS’s continued investment in SiC and GaN development underlines its commitment to driving the scalability, sustainability, and performance of next-generation AI data centers built on 800 VDC power infrastructure.

Original – Alpha and Omega Semiconductor