Fixed-ratio buck converters are essential in two-stage data center power architectures, where they reduce the step-down requirement for secondary stage converters. Resonant switching capacitor (RSC) converters offer high efficiency and soft switching due to sinusoidal current, independent of load conditions. However, during load transients, mismatches between the resonant tank current and the load current can lead to abrupt voltage changes, necessitating large output capacitance, which increases cost and size. This work presents a control method for a 48-to-24 V RSC converter with a maximum load current of 20 A and 480 W output power, achieving a 90% reduction in output capacitance while maintaining stable voltage and a peak efficiency of 98.7% with very fast transient recovery.
.jpg "Hélène T.W. Ma Yang (she/her/hers) photo")
.jpg "Liang Wang photo")
