A high conversion ratio converter is detailed analyzed in this paper. Inspired by partial power structure, the proposed topology can be divided into two circuits: LLC circuit and tapped-series capacitor (TSC) step-down circuit. The LLC converter operates under a constant operating frequency. The tapped-series capacitor converter …
A Cross-Coupled Hybrid Switched-Capacitor Buck Converter With Extended Conversion Range and Enhanced DCR Loss Reduction
Switched capacitor converters (SCCs) have been researched and applied widely due to the advantages of high efficiency and high power density. A generalized topology has been proposed to derive a large number of new topologies, which provides more options to the engineers. The performance of these topologies can be distinguished effectively by …
Use this capacitance converter to convert between common values like nF to uF. Use the chart to look up common capacitor codes. Or use the input fields to convert between picofarad (pF), nanofarads (nF), microfarads (µF), and farads (F).
The paper proposes a three-level resonant switched capacitor boost converter. The proposed converter can achieve full soft switching because of its resonant structure when switching frequency is equal to the resonant frequency. Frequency control is applied to regulate output voltage while keeping most of the soft switching features. The voltage …
A nonisolated fixed-ratio resonant switched-capacitor converter (RSCC) with high peak efficiency and high power density is encouraged as intermediate bus converter. With higher input voltages, stacked topologies achieve better component stress, but the relative current stress will be multiplied, e.g., ladder and Cockcroft–Walton …
The neutral-point-clamped (NPC) multilevel converter generally adopts the zero-sequence voltage injection method to realize the voltage balancing of the dc link capacitors. However, the relationship between the reference modulation voltage and the duty ratio of phase neutral point current is often a triangle or trapezoidal function. When …
In this work, we combine two popular power conversion topologies, the flying capacitor multilevel (FCML) converter and the LLC converter, to arrive at the proposed flying capacitor LLC (FCLLC) solution with advantages of each. The FCLLC comprises a step-down resonant switched-capacitor (ReSC) stage followed by a resonant transformer …
Request PDF | On Apr 1, 2024, Mo Huang and others published Recent advancements in continuously scalable conversion-ratio switched-capacitor converter | Find, read and cite all the research you ...
This article presents a fully integrated step-down switched-capacitor (SC) converter with nine voltage conversion ratios (VCRs) that regulates an output load vo ... Date of Publication: 05 June 2024 . ISSN Information: Print ISSN: 0018-9200 Electronic ISSN: 1558-173X INSPEC Accession Number: ...
Journal Articles. Data Center Power Delivery. Y. Zhu, J. Zou, and R. C. N. Pilawa-Podgurski, ''''A 1500-A/48-V-to-1-V Switching Bus Converter for Next-Generation ...
As the power required by modern data center processors increases, the power architecture must be adapted; for example, 48 V distribution voltage allows to reduce copper losses by a factor 16 with respect to the use of traditional 12 V power architecture. In order to generate the required processor core voltage, a two-stage approach is usually …
LLC converters are widely used in high-power, high-power-density scenarios due to their ability to achieve high-frequency operation and galvanic isolation. However, the ac resonant capacitor and output dc capacitor are prone to aging and failure under high-frequency charging and discharging conditions. This paper proposes an online …
The hybrid switched-capacitor converter (SSC) has unique advantages in the application of high-fixed-ratio dc–dc conversion. To meet the requirements of the load or input …
Switched-capacitor (SC) DC−DC converter[1] is an impor-tant alternative to inductive DC−DC converter, in terms of removing the bulky power inductor. Hence, it is widely …
This article proposes a switching bus converter, an efficient and compact hybrid switched-capacitor (SC) voltage regulator, for direct 48 V to point-of-load power conversion in data centers. The proposed topology merges a 2-to-1 SC front-end with two eight-branch series-capacitor-buck (SCB) modules through two switching buses. …
This online unit converter allows quick and accurate conversion between many units of measure, from one system to another. The Unit Conversion page provides a solution for …
This paper presents a regulating Hybrid Switched Capacitor Converter (HSCC) topology suitable for high conversion ratio Point-of-Load (PoL) applications, specifically targeting 48 V to 1 V power delivery in space-based high-performance computing systems, where size and weight are important considerations, along with device de-rating for radiation …
This article proposes a matrix auto-transformer switched-capacitor dc–dc converter to achieve a high voltage conversion ratio, high efficiency, and high power density for 48-V data-center applications. On the high-voltage side, the proposed converter can fully leverage the benefits of high-performance low voltage stress devices similar to the …
The capacitance conversion calculator makes it easy to quickly convert capacitance values between units pF, nF, µF and F.
In the two-stage architecture of 48 V data center power systems, the front-end intermediate bus converter (IBC) needs to adapt to both 48 V nominal input voltage and a wide input voltage range of the backup battery (typically 40 V–60 V). To cope with this design challenge, we propose a phase shift regulated resonant switched-capacitor …
Abstract: Neutral point (NP) voltage imbalance blocks the deployment of carrier-based clamped converters for specific scenarios due to the limited adjustment capability of NP current by zero-sequence voltage (ZSV) injection. Therefore, a novel six-level switched-capacitor (SC) hybrid clamped (6L-SCHC) converter is proposed, which has …
In this article, a three-level series resonant switched-capacitor active-fault interface dc/dc converter is proposed. Switched-capacitor modules are applied instead of full-bridge rectification to ...
Use our Capacitance Conversion calculator to convert between the popular capacitance units pF, µF, nF, and F.
This calculator converts capacitance value between units pF, nF, µF and F. The capacitor code conversion chart lets you find the capacitance by looking up the code. The first two digits are the value in picofarads, while the third is the multiplier. If no multiplier is given the result is capacitance in pF.
This letter introduces the phase-merging turbo (PMT) technique, a method which significantly augments the output current capability of a continuous scalable conversion-ratio (CSCR) switched-capacitor voltage regulator (SCVR). The research also proposes a unique method for implementing communication-free ganging with these …
3 · Multi-port converter (MPC) gets growing applications due to its advantages of flexible control and high power density. But the fluctuation low frequency DC bus current ripples could degrade the operational stability of the system. In this paper, a frequency-adaptive repetitive control method is proposed to eliminate the effect of variable low …
Neutral-point voltage unbalancing is a common problem in three-level inverters. The original neutral-point voltage balancing circuit is the buck–boost converter. Since the inductor carries low frequency components, the power density is limited. At the same time, the efficiency is low because the soft switching cannot be realized. In this …
This letter generalizes the fundamental limit theory in switched-capacitor (SC) converters. The fundamental limit theory proposed in 1995 sets the voltage-gain-ratio (VCR) boundaries for a specific number of k flying capacitors in the SC converter. Although this limit is valid for the positive VCR, another condition must be satisfied for the negative VCR. Moreover, …
Authors: Rohit Rothe1, Jungho Lee1, Zichen Fan1, Li-Yu Chen1, Donguk Seo2, Yoonmyung Lee2, Dennis Sylvester1, David Blaauw1 1University of Michigan, Ann Arbor, 2Sungkyunkwan University This work presents a switched capacitor high voltage (HV) DC-DC converter with a single off-chip flying capacitor (SOF) for uW current draw …
Use this capacitance converter to convert between common values like nF to uF. Use the chart to look up common capacitor codes. Or use the input fields to convert between …
This article presents a family of resonant switched-capacitor (SC) converters with multiple operating phases, herein named "Multi-Resonant SC Converter". These converters can be synthesized from the basic two-phase SC topologies, such as the Doubler and the Series-Parallel, and are capable of achieving the same conversion ratio …