Abstract: This brief presents a reconfigurable step-down switched-capacitor power converter fabricated using a 180 nm CMOS process for low-power applications. The proposed Optimized Partial Series-Parallel (OPSP) topology aims to achieve an intermediate voltage conversion ratio while more effectively minimizing parasitic capacitor losses. This
The fast-growing development in wearable electronic devices leads to high demand for small-volume, lightweight, and high-efficiency DC-DC power converters, particularly switched capacitor (SC) DC-DC converters. In this paper, we propose a synthesis framework of step-down SC DC-DC power converters to obtain an optimum converter topology under the design constraints of
In this article, a step-down series-parallel dual resonant switched-capacitor converter (SP-DRSCC) is proposed to address issues of traditional SCC, such as high transient current spikes, inherent capacitor charge-sharing losses, hard-switched operation, and so on. The dual-resonant-core (DRC) is added to the traditional SP switched-capacitor-converter (SCC)
Abstract—A closed-loop scheme of adaptive switched-capacitor converter (ASCC) is presented by combining a phase generator and non-overlapping circuit to realize the switched-capacitor
Experiments validate the voltage step-down property with a voltage gain of 0.4 and a peak dc–dc efficiency of 87.3%. This article proposes a current-fed capacitive power
In this article, a step-down series-parallel dual resonant switched-capacitor converter (SP-DRSCC) is proposed to address issues of traditional SCC, such as hig
Parallel-Plate Capacitor: In a capacitor, the opposite plates take on opposite charges. The dielectric ensures that the charges are separated and do not transfer from one plate to the other. The purpose of a capacitor is to store charge, and in a parallel-plate capacitor one plate will take on an excess of positive charge while the other becomes more negative.
For step-down, the ladder topology is simple and intuitive, with all the capacitor voltages the same. For step-up, Dickson & Fibonacci are also friendly to multiple outputs. Sharing 2 fly capacitors with time-interleaving operation. Results in larger output ripples for both outputs. Reduced cross regulation. Fully-on-chip.
In this paper, a step-down DC-DC converter with charge-average processes is proposed. The converter designed by using switched-capacitor (SC) techniques can generate the output
Abstract. Step-down buck regulators are extremely popular in a variety of portable and non-portable equipment. These buck converters are terminated with an input capacitor, C IN and an output capacitor, C O, at the output.C IN provides high-frequency filtering, so that V IN has low ripple. This application note helps a system designer to set-up Mathcad
Abstract: This study proposes a series/parallel piezoelectric resonator (SPPR) DC-DC converter that strives to improve performance at larger step-down ratios than what baseline piezo-resonator-based (PR) converters can nominally achieve. In the proposed converter, a series/parallel (SP) switched capacitor (SC) network is integrated into a traditional piezo-resonator-based step
Abstract—A closed-loop scheme of adaptive switched-capacitor converter (ASCC) is presented by combining a phase generator and non-overlapping circuit to realize the switched-capacitor-based (SC) step-down conversion for piezoelectric energy harvesting.
Dependent variations in switching frequency and power density reveal that the converter has a relatively constant output ripple voltage and its efficiency figure approaches that of a conventional linear step-down converter over the same output power range.With a single capacitor and switch requirements, the circuit has a reduced complexity compared to other
In this paper, a step-down DC-DC converter with charge-average processes is proposed. The converter designed by using switched-capacitor (SC) techniques can generate the output voltage which is expressed by (Q/P)ﾃ遊inP 竏・1,2,...,N}andQ).
In this design, the capacitors are connected in parallel during charging and connected in series during discharging. With this method, the voltage of the capacitors in
Parallel Capacitor Formula. When multiple capacitors are connected in parallel, you can find the total capacitance using this formula. C T = C 1 + C 2 + + C n. So, the total capacitance of capacitors connected in parallel is equal to the sum of their values. How to
Download scientific diagram | Step-down converters based on the switched-capacitors; (a) 2-to-1, (b) series-parallel (4-to-1), (c) Dickson (4-to-1), (d) Fibonacci (5-to-1), (e) ladder (4-to-1) and
Parallel-Plate Capacitor. The parallel-plate capacitor (Figure (PageIndex{4})) has two identical conducting plates, each having a surface area (A), separated by a distance (d). When a voltage (V) is applied to the
In this paper, it is clarified using a theoretical method, circuit simulations, and experiments that discharging series capacitors with a step-down circuit is better than discharging parallel capacitors with a step-up circuit from
Experiments validate the voltage step-down property with a voltage gain of 0.4 and a peak dc–dc efficiency of 87.3%. This article proposes a current-fed capacitive power transfer (CPT) system with a basic parallel–series (PS) compensation for step-down constant-voltage output. There are three main contributions.
In this article, a step-down series-parallel dual resonant switched-capacitor converter (SP-DRSCC) is proposed to address issues of traditional SCC, such as high transient current spikes,...
develop a modified series-parallel architecture that can be implemented with all low-voltage rated switches without affecting the overall converter VA rating. An experimental integrated circuit
Abstract: This brief presents a reconfigurable step-down switched-capacitor power converter fabricated using a 180 nm CMOS process for low-power applications. The proposed
For step-down, the ladder topology is simple and intuitive, with all the capacitor voltages the same. For step-up, Dickson & Fibonacci are also friendly to multiple outputs. Sharing 2 fly
develop a modified series-parallel architecture that can be implemented with all low-voltage rated switches without affecting the overall converter VA rating. An experimental integrated circuit (IC) prototype highlights a nominally 3:1 resonant switched-capacitor (ReSC) converter that merges a
In this design, the capacitors are connected in parallel during charging and connected in series during discharging. With this method, the voltage of the capacitors in series becomes two...
In this paper, it is clarified using a theoretical method, circuit simulations, and experiments that discharging series capacitors with a step-down circuit is better than discharging parallel capacitors with a step-up circuit from the aspect of power efficiency.
An efficient control of the gate voltage of switches that operate outside the supply range is a problem that occurs in circuits such as step-up DC/DC converters and stimulation circuits for implantable devices. This paper proposes solutions to this problem, using as case study a 3x, ultra low-power, step-up DC/DC converter with series–parallel
lution is less than 20 mm3 with the use of only 0402 and 0201 capacitors and a mm-scale (roughly 0402 footprint) 36 nH inductor. Importantly, this work shows that the series-parallel topology is both viable and promising for use as a hybrid switched capacitor converter. While there is a need to develop methods for gate driving with the
Takahiro Inoue竏冷・竏冷・Member A step-down DC-DC converter with charge-average processes is proposed in this paper. The converter is designed by using switched-capacitor (SC) techniques.
The step-down conversion is achieved by iterating these operations. Hence, in the series-parallel type converter, the output capacitorCo becomes large to reduce the ripple noise of the output voltage, because the output voltage cannot be obtained in every clock cycle.
witched capacitor converters are increasingly promising to address the needs of future high-density power delivery applications. This paper explored the use of the series-parallel architecture, its capability to operate in resonant
integrated circuit (IC) mplementation of a hybrid switched capacitor converter based onmodified s ries-parallel architecture. The converter operates inquasi-resonant mode to regulate a nominal 3.7 V output from a 12 V supply. The design uses zero-current detection and nested 1-bit regulation to autotune the zero-current
ces N3a and N3b simultaneously charge the flying capacitors to approximately Vin/3, with their threshold drop compensated by N2. The switching node is charged by device N5a; with the inductor in place, this serves to
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