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

5 Conclusion

As data centers evolve from an AC distribution to a DC distribution, the PSUs in data center servers are becoming IBC in the front of the IT tray, and the power sidecar makes this evolution a smooth and manageable transition. The power sidecar forms the connection between the traditional AC distribution and the future 800V DC distribution—smoothing the load transient by providing huge amounts of power with energy storage.

The PSU in the sidecar has the same functions as a traditional PSU with slight modifications, and new technologies are driving PSUs in data centers to be more efficient and reliable; including GaN devices, HHC LLC, and 800V rated controllers and converters.