SLYT865 March   2025 LMG3422R030 , LMV797 , SN74LV1T125 , TLV713P-Q1 , TMS320F280033

 

  1.   1
  2. 1Introduction
  3. 2Inrush current vs. re-rush current
  4. 3Proposed re-rush current control method
  5. 4Test result
  6. 5Conclusion
  7. 6References

1 Introduction

The recently released Modular Hardware System – Common Redundant Power Supply (M-CRPS) specification [1] requires the re-rush current (which is different from the well-known inrush current) needs to be limited when the input voltage resumes after an input brownout or blackout event on the power supply used in data center. Previously, this re-rush current was unspecified, and no special control action for this event existed. In this article, I’ll present a low-cost, simple and very effective method to meet the M-CRPS requirement.