Modeling and Comparison of Passive Component Volume of Hybrid Resonant Switched-Capacitor Converters

Multi-Resonant Switched-Capacitor Converter: Achieving High Conversion Ratio With Reduced Component Number

“…It can be seen that the MRD uses fewer components than all other topologies, including the cascaded resonant converter (a type of two-phase voltage doubler) and the Fibonacci converter, which is at the theoretical lower limit of two-phase SC converters. Moreover, as shown in Table III, when evaluating the total passive component volume from the fundamental energy transfer perspective [31], doubler-based topologies are found to have excellent passive component utilization compared to other topologies. As a result of this reduction in component number and volume, the MRD has the potential to achieve higher power density compared to other two-phase SC converters.…”

“…The parallel operation in Phase 3 demands that C 2 = C 3 = C. Using the relationship between the resonant frequencies and time durations of each phase and charge balance on the capacitors (as demonstrated for the 8-to-1 MRD in Section IV), the minimum C 1 required for soft-charging operation can be found to be C 1,min = 1 6 C. Using the methodology outlined in [31], Fig. 16 compares the theoretical passive and active component utilization of various ReSC converters at a conversion ratio of 6-to-1.…”

“…It can be seen that the proposed CaSP converter can achieve a similar theoretical passive volume and switch stress as the Series-Parallel converter, but with a greatly reduced number of components. This is of note as the passive volume of the Series-Parallel topology is known to be at the theoretical lower bound [31]. Compared to the switched-tank converter (STC), the CaSP converter can potentially achieve higher power density, even This article has been accepted for publication in IEEE Open Journal of Power Electronics.…”

Optimization of DC-DC Power Supply Systems by Differential and Hybrid Power Processing

“…Hybrid converters are normally referred to as the topologies combining both capacitive and inductive components for power conversion. It has become a popular topic in recent years for the high power density and efficiency comparing to traditional converters that use only magnetic components for power conversion [8], [9], [73], [74], [10], [66]- [72].…”

“…However, on the power architecture level, as illustrated in Section 1-4, the analyses are incomplete due to the neglecting of direct power. For hybrid converters, there have been some comparative studies, but they are limited to switched capacitor based converters [66]- [69], and to the authors' knowledge, so far there lacks some systematical study on how the power is processed "hybridly", that is, how much power is being processed by each type of components in the converters, thus to reveal the general design objective for hybrid converters.…”