Abstract
In this paper, a 4:1 switched capacitor converter (SCC) is derived. Compared with the Dickson 4:1 converter, the voltage of flying capacitors is lower and thus the effect of dc bias on multi-layer ceramic capacitor (MLCC) is reduced. With a limited number of MLCCs, the proposed converter achieves a higher efficiency, and it is suitable for the applications with limited volume such as mobile phone fast charging. A 20-V to 5-V prototype is built with 24 X7R MLCCs in 0805 package, and its efficiency is 1.7% higher than the Dickson 4:1 and 1.1% higher than the Series-parallel 4:1 at 16-A output current.
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