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Integrated perovskite solar capacitors with high …
Integrating energy harvesting devices with energy storage systems can realize a temporal buffer for local power generation and power consumption. In this manner, self-charging energy devices consisting of photovoltaic …
Switched-capacitor-convertors based on fractal design for output …
Herein, we propose a fractal-design based switched-capacitor-convertors with characteristics including high conversion efficiency, minimum output impedance, and electrostatic voltage...
A High-Efficiency Resonant Switched Capacitor …
A resonant switched capacitor converter (RSCC) with high efficiency over a wide and continuous conversion ratio range is introduced. The efficiency of the topology depends primarily on...
Performance Modelling and Design Techniques for Efficiency …
Switched-Capacitor (SC) converter is a class of DC-DC power converters that efficiently converts one voltage level to another using switches and capacitors.
A Fully Integrated Switched-Capacitor Voltage Regulator with …
This paper presents a fully integrated switched-capacitor dc–dc voltage regulator (SCVR) ... The proposed SCVR achieves 190 ps transient FoM with peak conversion efficiency of 83.7%@114.2 mA/mm 2 and 110× supported loading range of 80 μA–8.8 mA. ...
A Fully Integrated Switched-Capacitor Voltage Regulator with …
Abstract: This paper presents a fully integrated switched-capacitor dc–dc voltage regulator (SCVR) in standard 28 nm CMOS with a proposed regulation algorithm of multi-rate successive approximation (MRSA) and several …
14.4 A Monolithic 26A/mm2Imax, 88.5% Peak-Efficiency Continuously Scalable Conversion-Ratio Switched-Capacitor DC-DC Converter …
14.4 A Monolithic 26A/mm 2 I max, 88.5% Peak-Efficiency Continuously Scalable Conversion-Ratio Switched-Capacitor DC-DC Converter Abstract: As SoC complexity continues to increase, more and more fine-grained power domains are being employed to more precisely allocate power and meet stringent requirements on power, performance, …
Q factor | Fundamentals | Capacitor Guide
The Q factor of a capacitor, also known as the quality factor, or simply Q, represents the efficiency of a given capacitor in terms of energy losses. It is defined as: where QC is the quality factor, XC is the reactance of the capacitor, C the capacitance of the capacitor, RC is the equivalent series resistance (ESR) of the capacitor, and ω0 is the frequency in …
Improving energy conversion efficiency for triboelectric …
In this paper, a clear understanding of triboelectric generators with capacitor structures is presented by the investigation of polydimethylsiloxane-based composite film …
Recent advancements in continuously scalable conversion-ratio switched-capacitor converter
A 12V-to-1V quad-output switched-capacitor buck converter with shared DC capacitors achieving 90.4% peak efficiency and 48mA/mm 3 power density at 85% efficiency. 2023 IEEE International Solid-State Circuits …
A 4.6W/mm2 power density 86% efficiency on-chip switched capacitor DC-DC converter …
The measured performance of a 2 ∶ 1 voltage conversion ratio on-chip switched capacitor converter implemented in 32nm SOI CMOS technology with 1.8V input voltage results in a power density of 4.6W/mm 2 at 86% efficiency when operated at a switching
Improving energy conversion efficiency for triboelectric nanogenerator with capacitor structure by maximizing surface charge density
Nanogenerators with capacitor structures based on piezoelectricity, pyroelectricity, triboelectricity and electrostatic induction have been extensively investigated. Although the electron flow on electrodes is well understood, the maximum efficiency-dependent structure design is not clearly known. I …
Efficient energy conversion mechanism and energy storage …
The energy conversion efficiency is increased by 8.5 times through synergistical optimization of TENG and switch configurations ... switch capacitors 33,34, Buck converters 35,36,37, and other ...
Two-Stage Energy Efficiency Optimization of Switched-Capacitor …
Our proposed work optimizes the conversion efficiency of the switched-capacitor converters in two stages: in the early planning stage, we optimize the capacitance …
Comparative Performance Analysis of Regulated Hybrid Switched-Capacitor Topologies for Direct 48 V to Point-of-Load Conversion …
Multiple regulated hybrid switched-capacitor (SC) topologies have been proposed in previous literature for direct 48 V to point-of-load (PoL) conversion. To compare their theoretical potential, this paper establishes an analytical framework for topological characterization and performance comparison using two metrics: a) a …
Understanding Efficiency of Switched Capacitor DC-DC Converters for Battery-Powered Applications …
Efficiency of 2-Topology Switched Capacitor DC-DC Converter Efficiency Tradeoffs The tradeoffs to achieve this high SC DC-DC converter efficiency are the increased area due to additional switches needed for switching between multiple topologies and the control logic required to implement it.
Photocapacitor integrating perovskite solar cell and symmetrical supercapacitor generating a conversion storage efficiency …
Fig. 2 a and b present the structure diagram and the cross-view SEM images of the PSC unit, respectively. From the SEM images, the thickness of the ETL (SnO 2 and/or TiO 2) is about 60–80 nm, the thickness of PVK layer is nearly 600 nm, the thickness of HTL (Spiro) is about 240 nm, the thickness of Au electrode on the hole …
A low-ripple efficiency-improvement switched-capacitor boost …
By splitting charge–discharge switches in SCCP into parallel structures with binary-sized unit switches, a peak power conversion efficiency of 94.2% is obtained …
Single-Ended High-Efficiency Step-up Converter Using the Isolated Switched-Capacitor …
boost converter and isolated switched-capacitor cell are connected in series to obtain high step-up with low turn-on ratio. A hardware prototype with 30 V to 40 V input voltage and 340 V output voltage is implemented to verify the performance of the
A Ten-Level Series-Capacitor 24-to-1-V DC–DC Converter With Fast In Situ Efficiency …
This work presents a high-efficiency ten-level series-capacitor 24-to-1-V buck converter with three techniques to improve its efficiency and reliability. First, we propose a fast in situ efficiency tracking (FIT) technique to maximize efficiency across load conditions and process, voltage, and temperature (PVT) variations. The second technique is the power …
Analysis of Energy Conversion Efficiency of a Capacitor-Based …
To analyze the stored-to-kinetic energy conversion efficiency, a transient electric-circuit model for a railgun system is built using the electrical circuit analysis software SIMPLORER in this paper, and the electric parameters of the model are defined with measurement values of the actual system. Many results of simulations and experiments …
Resonant switched capacitor stacked topology enabling high DC-DC voltage conversion ratios and efficient …
Abstract: This paper presents a stacked-topology resonant switched-capacitor (ResSC) dc-dc converter to achieve a high voltage conversion ratio. The topology can be generalized to any N-to-1 dc-dc conversion application with only a single inductor. Multiphase ...
Electrolytic Capacitor-Less Single-Power-Conversion On-Board Charger With High Efficiency …
This paper presents an electrolytic capacitor-less single-power-conversion on-board charger with high efficiency. The proposed on-board charger is composed of a step-up ac-dc converter which includes an active-clamp circuit and a series-resonant circuit. The active-clamp circuit provides a zero-voltage switching of switches …
A 99.74% Efficient Capacitor-Charging Converter Using Partial …
This work combines a 99.2% efficient gallium nitride (GaN)-based low-voltage fast-switching half-bridge converter with an Si-based high-voltage slow-switching and almost lossless switched capacitor multiplexer using a partial power processing approach to a six-level prototype with 99.74% efficiency. A loss breakdown shows how …
Parameters Optimized Design of Electrolytic-Capacitor-Less LCC-S WPT System to Improve Efficiency …
In this paper, the LCC-S network and semi-active rectifier (SAR) are integrated with the matrix converter (MC) based wireless power transfer (WPT) system to achieve the wide ranges of buck and boost conversion and power regulation without using the electrolytic capacitors. The life time and adaptability of the WPT system are improved. According to …
A GaN-based 97% efficient hybrid switched-capacitor converter with lossless regulation capability …
DC-DC converters for large conversion ratio applications face challenges such as high device stress and large inductor size. Switched-capacitor (SC) converters are known to have reduced device stress and no inductors, but the associated large transient current and poor efficiency at regulated output have prevented their wide adoptions. In this work, a …
Efficiency Optimization of a Step-Down Switched Capacitor Converter …
In this brief, an efficient voltage scalable switched capacitor converter (SCC) for 1.1 V battery-powered digital system is presented. The SCC employs a binary resolution technique to preserve high efficiency at load voltages down to sub-200 mV while keeping the efficiency high. The proposed converter can be configured into four topologies to …
Digital 2-/3-Phase Switched-Capacitor Converter With Ripple Reduction and Efficiency …
This paper presents a digitally controlled 2-/3-phase 6-ratio switched-capacitor (SC) dc-dc converter with low output voltage ripple and high efficiency.SC regulators can use external capacitors ...
Extended Power Dynamic Range and Enhanced Power Conversion Efficiency of a Switched-Capacitor DC–DC Converter…
This tutorial brief presents a concise overview of integrated switched-capacitor (SC) DC-DC converter topologies for miniaturized energy harvesting (EH) IoT systems aiming for extended power dynamic range (PDR) and enhanced power conversion efficiency (PCE). This tutorial initiates by delving into the intricate SC conversion …
A High-Efficiency Resonant Switched Capacitor Converter With …
A resonant switched capacitor converter with high efficiency over a wide and continuous conversion ratio range is introduced. The efficiency of the topology …
Performance limits of switched-capacitor DC-DC converters
The theoretical performance limits of two-phase switched-capacitor (SC) DC-DC power converters are discussed in this paper. For a given number of capacitors k, the complete set of attainable DC conversion ratios is found. The maximum step-up or step-down ratio is given by the k/sup th/ Fibonacci number, while the bound on the number of …
Recent advancements in continuously scalable conversion-ratio …
A 12V-to-1V quad-output switched-capacitor buck converter with shared DC capacitors achieving 90.4% peak efficiency and 48mA/mm 3 power density at 85% …
Extended Power Dynamic Range and Enhanced Power …
This tutorial brief presents a concise overview of integrated switched-capacitor (SC) DC-DC converter topologies for miniaturized energy harvesting (EH) IoT …
Switching regulator fundamentals (Rev. C)
Push-Pull— A two-transistor converter that is especially efficient at low input voltages. ... In the automobile ignition, a capacitor is placed across the points to minimize damage due to arcing when the points break the current flowing in the low-voltage coil ). 1.3 ...
A high efficiency resonant switched-capacitor …
PDF | On Oct 1, 2017, Yanchao Li and others published A high efficiency resonant switched-capacitor converter for data center | Find, read and cite all the research you need on ResearchGateThe ...
Recent advancements in continuously scalable conversion-ratio …
Switched-capacitor (SC) DC−DC converter [ 1] is an important alternative to inductive DC−DC converter, in terms of removing the bulky power inductor. Hence, it …
A High-Efficiency Resonant Switched Capacitor Converter With Continuous Conversion …
A resonant switched capacitor converter with high efficiency over a wide and continuous conversion ratio range is introduced. The efficiency of the topology depends primarily on the conduction losses and is decoupled, to a large extent, from the voltage conversion ratio. This is an advantage over classical switched capacitor …
Hybrid Dickson Switched-Capacitor Converter With Wide Conversion …
Hybrid switched-capacitor (SC) converters have shown great promise in achieving high efficiency and power density for dc-dc conversion. By combining an SC stage with an inductor filter stage, benefits from both approaches can be realized. In this work, a hybrid Dickson SC converter with a 4:1 native conversion ratio and regulated output voltage …