5 Conclusion

The power supply used in data centers requires the re-rush current when the AC voltage resumes from dropout should not exceed a limitation defined in M-CRPS specification. By replacing the traditional mechanical relay with a solid-state relay, and rapidly turn off/on the relay when re-rush current exceeds a programmable threshold, the re-rush current can be well controlled to not exceed the M-CRPS limit specification but high enough to rapidly boost V_OUT. Moreover, this firmware-based method leverages the existing R_T, resulting in a low-cost and very effective re-rush current control solution.