STDA027 March   2026 LM2776

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1The Evolution of Power Supply Units in Data Center Servers
  5. 2The Requirements of PSUs in Data Center Servers
    1. 2.1 Higher Efficiency Demands
    2. 2.2 Fast Transient Response Driven by GPUs
    3. 2.3 Intelligence and Security
  6. 3PSU Variations in 800V DC Architecture
  7. 4Key Technologies Shaping the Next Generation of PSUs
    1. 4.1 Gallium Nitride (GaN) Reduces Switching Energy Losses and Increases Efficiency
    2. 4.2 Bidirectional GaN Cost Down Vienna PFC Solution
    3. 4.3 Hybrid Hysteretic-Controlled LLC Helps Quicken Transient Response
    4. 4.4 High-Voltage ORing Control Supports 800V Hot Swapping
  8. 5Conclusion
  9. 6References

2.1 Higher Efficiency Demands

Contemporary data centers impose far stricter efficiency standards on PSUs than the traditional 80 PLUS® certification. For PSUs in traditional servers, the highest standard in the 80 PLUS certification is the Ruby class, which calls for 96.5% efficiency at half load. While in a modern data center, the PSU is pursuing 98%+ peak efficiency with the included cooling fan power.