Gain and Efficiency Analysis of 2-Stage Switched Capacitor (SC) Boost Based dc-dc Converter

Abstract

This paper presents the theoretical analysis, operating principles, and comparison between basic boost and 2-stage switched capacitor (SC) based boost converter. Using voltsecond balance and current charge principle, voltage gain and efficiency are theoretically derived for the basic boost and 2-stage SC based boost converter. MATLAB software has been utilized to simulate the predicted results. Simulation results, which are in complete agreement with the predicted results, have been analysed and compared with the results of the basic boost converter. Largely increased voltage gain with a commendable efficiency for the 2-stage SC based boost converter, validate the authenticity of the proposed system.

Performance Modelling and Design Techniques for Efficiency Improvement in On-chip Switched-Capacitor DC-DC Converter

“…In (6), 𝐶 𝑖 represents the capacitance corresponds to i th capacitor and 𝑎 𝑐,𝑖 is the ratio of charge flow per period in 𝐶 𝑖 to the total output charge flow in one period in steady state known as charge multiplier coefficient. To calculate the charge multiplier vectors for charging and discharging phase shown in Fig.…”

“…These converters are utilized in a variety of chip-scale power delivery, MIMO (Multiple-Input Multiple-Output) systems and IoT sensor nodes [2], [3], [4]. Higher power density in SC converters results in higher energy storage capacity due to the integrated capacitors compared to the inductor based converters [5], [6]. Most of the current research in this area is being focused on developing very low-power on-chip applications such as battery-powered signal processors where high power conversion efficiency is essential with reduced parasitic losses.…”

“…In this paper, the impact of various parasitic losses associated with switch capacitor, bottom plate capacitor and ESR are considered simultaneously as compared to previous literatures, to implement energy efficient SC converter. In literature, a large number of techniques are developed for the design and analysis of SC converters compared to the case of inductive topologies where comprehensive analysis of designs is limited [6], the design and analysis of the SC topologies is a challenging task. From the design point of view, the permitted area (fixed flying capacitor), target supply voltage, and the desired load current in SC converter are fixed.…”

Maximum Power Point Tracking by the Small-Signal-Based PI and Fuzzy Logic Controller Approaches for a Two-stage Switched-Capacitor DC-DC Power Boost Converter; Applicable for Photovoltaic Utilizations

“…Fuzzy logic control technique has a rule base and consists of If-then rules. The essential idea of fuzzy logic is utilizing a variable whose values are words (such as small and large) rather than a number [22]. Figure 7 exhibits the parts of the fuzzy logic controller.…”