Next-Generation 800V HVDC Architecture

onsemi has unveiled cutting-edge high-voltage silicon carbide (SiC) and Solid State Transformer (SST) solutions designed to address the escalating power demands of AI data centers. As AI workloads surge, traditional 400V AC power distribution is reaching its limits. The industry is shifting towards 800V High-Voltage Direct Current (HVDC) systems to minimize conversion losses and maximize efficiency.

Technical Advancements in SiC and SST

The integration of wide-bandgap SiC devices enables higher switching frequencies, superior thermal performance, and robust operation under extreme thermal stress. By leveraging advanced SST topologies, onsemi's solutions replace bulky legacy magnetic transformers with compact, solid-state alternatives. Key benefits include:

  • Reduced copper losses through higher voltage transmission.
  • Smaller magnetic components due to high-frequency SST operation.
  • Enhanced power density and simplified cooling infrastructure.

Industry Impact on AI Infrastructure

Transitioning to 800V HVDC significantly reduces the total cost of ownership for hyperscale data centers. By eliminating multiple AC-to-DC conversion stages, operators can achieve unprecedented power usage effectiveness (PUE). Furthermore, this paradigm shift supports the deployment of liquid-cooled server racks capable of handling 100kW per rack, a necessity for modern GPU clusters. The reduction in cabling weight and volume also accelerates deployment timelines.

Future Outlook for Data Center Power

Looking ahead, onsemi expects widespread adoption of SST technology across next-generation AI facilities globally. The continuous optimization of SiC MOSFETs, coupled with advanced packaging innovations, will further drive down system costs. This will make 800V HVDC the definitive industry standard for sustainable, high-density computing environments by 2028, ensuring that power delivery scales seamlessly with AI computational demands.