Seoul National University Seoul National University
This paper proposes a design methodology for generalized switched-capacitor (SC) converter topologies, which is based on an explicit equation-based representation for topological circuit models. In the proposed method, the DC biases of each passive component are expressed as numerical values, which indicates that Kirchhoff’s voltage law (KVL) is satisfied. The optimization process and the derivation of performance metrics for both passive and active components are illustrated through detailed examples. Following the outlined design constraints, the methodology enables the realization of a general two-phase step-down SC converter with an arbitrary voltage conversion ratio. As a practical example, a novel 6:1 SC converter topology that reduces the theoretical passive component volume by 75% compared to the conventional Dickson converter is presented. The proposed topology is demonstrated through a 48V-to-8V hardware prototype, which achieves a peak efficiency of over 98%.
