Please use this identifier to cite or link to this item: https://hdl.handle.net/10419/243867 
Year of Publication: 
2020
Citation: 
[Journal:] Energy Reports [ISSN:] 2352-4847 [Volume:] 6 [Issue:] 2 [Publisher:] Elsevier [Place:] Amsterdam [Year:] 2020 [Pages:] 119-124
Publisher: 
Elsevier, Amsterdam
Abstract: 
For data center applications, we present a direct high step-down DC/DC converter designed by using switched capacitor (SC) techniques. To achieve high step-down conversion, the proposed converter connects a novel cascade ring-type converter to a traditional buck converter. Unlike existing high step-down SC DC/DC converters, such as ladder-type SC converter, the proposed cascade ring-type converter provides (1/4)2 × stepped-down voltage by using four-phase clock pulses, where a 48 V input is converted to 3V. In the buck converter, the output of the cascade ring-type converter is converted to 3D V (0<D<1). Hence, the proposed converter can achieve the (D/16)× voltage gain by converting the 48 V input twice. Furthermore, small size and light weight are offered by the proposed converter with a single inductor. The performance of the proposed converter is evaluated by theoretical analysis, computer simulations, and bread board experiments. The evaluation results demonstrate that the proposed converter outperforms the conventional ladder-type SC converter in the point of power efficiency and output voltage.
Subjects: 
Cascade connections
Data center applications
DC/DC converters
Ring-type converters
Step-down converters
Persistent Identifier of the first edition: 
Creative Commons License: 
cc-by-nc-nd Logo
Document Type: 
Article
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