A new quick response digital control switching power supply unit for HVDC system

The purpose of this paper is to present a new digital control switching power supply for the HVDC system in data center. The two stage converters are proposed to address the problem of input voltage drop. It consists of the boost converter and the phase-shifted full bridge converter. Since the first stage boost converter make the output voltage constant, good regulation characteristics against the input voltage of the server as the load and superior transient response are achieved with keeping high efficiency in this proposed converter for HVDC. A digital peak current mode control and the existing fast P control are implemented. And then the transient responses of converters in parallel operation are discussed because it is needed in the data center. The digital control method presented in this paper achieves the superior response compared with the existing digital control. It is experimentally verified with 800W prototypes that this unit has superior static and dynamic characteristics.