A Low Ripple Fully Integrated Switched Capacitor Buck Converter Employing Time Interleaving And Pulse Frequency Modulation Techniques

DOWNLOAD

Download A Low Ripple Fully Integrated Switched Capacitor Buck Converter Employing Time Interleaving And Pulse Frequency Modulation Techniques PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get A Low Ripple Fully Integrated Switched Capacitor Buck Converter Employing Time Interleaving And Pulse Frequency Modulation Techniques book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page

A Low Ripple Fully Integrated Switched Capacitor Buck Converter Employing Time Interleaving And Pulse Frequency Modulation Techniques

DOWNLOAD
Author : Anurag Veerabathini
language : en
Publisher:
Release Date : 2014

A Low Ripple Fully Integrated Switched Capacitor Buck Converter Employing Time Interleaving And Pulse Frequency Modulation Techniques written by Anurag Veerabathini and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with Electric current converters categories.

A fully-integrated switched capacitor buck converter implemented in the ON-Semi 0.5-[mu]m technology, that converts a 3.3 VDC to 1.5 VDC while driving up to a 8-mA current load. A symmetric charge-discharge topology for capacitors is devised for low ripple. Ultra-low output ripple is achieved through time-interleaving. It is observed in simulation that a ripple of 100 mV on a baseline design can be reduced to 6 mV by implemented 4-phase time-interleaving with a symmetric topology. To achieve high efficiencies at lower loads, a burst-mode pulse-frequency modulation (PFM) technique is implemented. A multi-layer layout technique is used for bucket capacitor to reduce the effect to parasitic capacitances, thereby increasing the efficiency of the circuit. To integrate more capacitance in less area on-chip, the tank capacitor is implemented as a MOSCAP. Maximum measured efficiency of 68% is achieved at 8 mA current load. Measured output voltage ripple less than 28 mV is maintained for current loads between 8 mA and 500 [mu]A.

Signal Processing And Analysis Of Electrical Circuit

DOWNLOAD
Author : Adam Glowacz
language : en
Publisher: MDPI
Release Date : 2020-03-13

Signal Processing And Analysis Of Electrical Circuit written by Adam Glowacz and has been published by MDPI this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-03-13 with Technology & Engineering categories.

This Special Issue with 35 published articles shows the significance of the topic “Signal Processing and Analysis of Electrical Circuit”. This topic has been gaining increasing attention in recent times. The presented articles can be categorized into four different areas: signal processing and analysis methods of electrical circuits; electrical measurement technology; applications of signal processing of electrical equipment; fault diagnosis of electrical circuits. It is a fact that the development of electrical systems, signal processing methods, and circuits has been accelerating. Electronics applications related to electrical circuits and signal processing methods have gained noticeable attention in recent times. The methods of signal processing and electrical circuits are widely used by engineers and scientists all over the world. The constituent papers represent a significant contribution to electronics and present applications that can be used in industry. Further improvements to the presented approaches are required for realizing their full potential.

Fully Integrated Switched Capacitor Buck Converter With High Efficiency And Low Output Ripple

DOWNLOAD
Author : Sudhir Reddy Gouni
language : en
Publisher:
Release Date : 2012

Fully Integrated Switched Capacitor Buck Converter With High Efficiency And Low Output Ripple written by Sudhir Reddy Gouni and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with DC-to-DC converters categories.

Power Systems On Chip

DOWNLOAD
Author : Bruno Allard
language : en
Publisher: John Wiley & Sons
Release Date : 2016-11-22

Power Systems On Chip written by Bruno Allard and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-11-22 with Science categories.

The book gathers the major issues involved in the practical design of Power Management solutions in wireless products as Internet-of-things. Presentation is not about state-of-the-art but about appropriation of validated recent technologies by practicing engineers. The book delivers insights on major trade-offs and a presentation of examples as a cookbook. The content is segmented in chapters to make access easier for the lay-person.

Integrated Switching Dc Dc Converters With Hybrid Control Schemes

DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2009

Integrated Switching Dc Dc Converters With Hybrid Control Schemes written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.

In the modern world of technology, highly sophisticated electronic systems pave the way for future's information technology breakthroughs. However, rapid growth on complexity and functions in such systems has also been a harbinger for the power increase. Power management techniques have thus been introduced to mitigate this urgent power crisis. Switching power converters are considered to be the best candidate due to their high efficiency and voltage conversion flexibility. Moreover, switching power converter systems are highly nonlinear, discontinuous in time, and variable. This makes it viable over a wide operating range, under various load and line disturbances. However, only one control scheme cannot optimize the whole system in different scenarios. Hybrid control schemes are thus employed in the power converters to operate jointly and seamlessly for performance optimization during start-up, steady state and dynamic voltage/load transient state. In this dissertation, three switching power converter topologies, along with different hybrid control schemes are studied. First, an integrated switching buck converter with a dual-mode control scheme is proposed. A pulse-train (PT) control, employing a combination of four pulse control patterns, is proposed to achieve optimal regulation performance. Meanwhile, a high-frequency pulse-width modulation (PWM) control is adopted to ensure low output ripples and avoid digital limit cycling. Second, an integrated buck-boost converter with a tri-mode digital control is presented. It employs adaptive step-up/down voltage conversion to enable a wide range of output voltage. This is beneficial to ever-increasing dynamic voltage scaling (DVS) enabled, modern power-efficient VLSI systems. DVS adaptively adjusts the supply voltage and operation frequency according to instantaneous power and performance demand, such that a system is constantly operated at the lowest possible power level without compromising its performance. Third, a digital integrated single-inductor multiple-output (SIMO) converter, tailored for DVS-enabled multicore systems is addressed. With a multi-mode control algorithm, DVS tracking speed and line/load regulation are significantly improved, while the converter still retains low cross regulation. All three integrated CMOS DC-DC converters have been designed and fabricated successfully, demonstrating the techniques proposed in this research. The measurements results illustrate superior line and load regulation performances and dynamic response in all these designs.

Dc Dc Converters For Future Renewable Energy Systems

DOWNLOAD
Author : Neeraj Priyadarshi
language : en
Publisher: Springer Nature
Release Date : 2021-09-27

Dc Dc Converters For Future Renewable Energy Systems written by Neeraj Priyadarshi and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-09-27 with Technology & Engineering categories.

The book presents the analysis and control of numerous DC-DC converters widely used in several applications such as standalone, grid integration, and motor drives-based renewable energy systems. The book provides extensive simulation and practical analysis of recent and advanced DC-DC power converter topologies. This self-contained book contributes to DC-DC converters design, control techniques, and industrial as well as domestic applications of renewable energy systems. This volume will be useful for undergraduate/postgraduate students, energy planners, designers, system analysis, and system governors.

Time Domain Digital Frequency Synchronized Hysteresis Based Fully Integrated Voltage Regulator

DOWNLOAD
Author : Shrikant Singh
language : en
Publisher:
Release Date : 2019

Time Domain Digital Frequency Synchronized Hysteresis Based Fully Integrated Voltage Regulator written by Shrikant Singh and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with DC-to-DC converters categories.

Power management integrated circuit (PMIC) design is a key module in almost all electronics around us such as Phones, Tablets, Computers, Laptop, Electric vehicles, etc. The on-chip loads such as microprocessors cores, memories, Analog/RF, etc. requires multiple supply voltage domains. Providing these supply voltages from off-chip voltage regulators will increase the overall system cost and limits the performance due to the board and package parasitics. Therefore, an on-chip fully integrated voltage regulator (FIVR) is required. The dissertation presents a topology for a fully integrated power stage in a DC-DC buck converter achieving a high-power density and a time-domain hysteresis based highly integrated buck converter. A multi-phase time-domain comparator is proposed in this work for implementing the hysteresis control, thereby achieving a process scaling friendly highly digital design. A higher-order LC notch filter along with a flying capacitor which couples the input and output voltage ripple is implemented. The power stage operates at 500 MHz and can deliver a maximum power of 1.0 W and load current of 1.67 A, while occupying 1.21 mm2 active die area. Thus achieving a power density of 0.867 W/mm2 and current density of 1.377 A/mm2. The peak efficiency obtained is 71% at 780 mA of load current. The power stage with the additional off-chip LC is utilized to design a highly integrated current mode hysteretic buck converter operating at 180 MHz. It achieves 20 ns of settling and 2-5 ns of rise/fall time for reference tracking. The second part of the dissertation discusses an integrated low voltage switched-capacitor based power sensor, to measure the output power of a DC-DC boost converter. This approach results in a lower complexity, area, power consumption, and a lower component count for the overall PV MPPT system. Designed in a 180 nm CMOS process, the circuit can operate with a supply voltage of 1.8 V. It achieves a power sense accuracy of 7.6%, occupies a die area of 0.0519 mm2, and consumes 0.748 mW of power.

Advanced Multiphasing Switched Capacitor Dc Dc Converters

DOWNLOAD
Author : Nicolas Butzen
language : en
Publisher: Springer Nature
Release Date : 2020-07-03

Advanced Multiphasing Switched Capacitor Dc Dc Converters written by Nicolas Butzen and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-07-03 with Technology & Engineering categories.

This book gives a detailed analysis of switched-capacitor DC-DC converters that are entirely integrated on a single chip and establishes that these converters are mainly limited by the large parasitic coupling, the low capacitor energy density, and the fact that switched-capacitor converter topologies only have a fixed voltage conversion ratio. The authors introduce the concept of Advanced Multiphasing as a way to circumvent these limitations by having multiple out-of-phase parallel converter cores interact with each other to minimize capacitor charging losses, leading to several techniques that demonstrate record efficiency and power-density, and even a fundamentally new type of switched-capacitor topology that has a continuously-scalable conversion ratio. Provides single-source reference to the recently-developed Advanced Multiphasing concept; Enables greatly improved performance and capabilities in fully integrated switched-capacitor converters; Enables readers to design DC-DC converters, where multiple converter cores are put in parallel and actively interact with each other over several phases to improve their capabilities.

Hybrid Switched Capacitor Power Converter Techniques

DOWNLOAD
Author : Nathan Miles Ellis
language : en
Publisher:
Release Date : 2020

Hybrid Switched Capacitor Power Converter Techniques written by Nathan Miles Ellis and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020 with categories.

Power conversion is a necessity in almost all modern electric systems and machines: energy must be regulated and delivered in the intended manner if a system is to perform well, or at all. Power converters, the electronic circuits used to control this energy flow, have been a subject of intense study and rapid development in recent years and are widely acknowledged to be a fundamental enabler for modern day human societal capabilities. Many market sectors have strongly advocated for further development of energy conversion systems with improved efficiency and power density as these traits often directly dictate practical viability. While advancements in semiconductor device physics have yielded improved parts for use inconverter solutions, it is becoming apparent that there is additional massive potential and merit in revisiting fundamental converter topologies and circuit techniques. To date, power converters that use capacitors as their primary energy transfer elements (termed "switchedcapacitor" power converters) are far less ubiquitous than their switched-inductor counterparts, and seemingly for good reason: characteristics such as poor output regulation and intrinsic transient inrush currents that lead to inefficiency have largely prevented switched-capacitor topologies from gaining practical consideration in general power converter markets. Solutions to these negative attributes are strongly desired as capacitors can offer energy densities up to three orders of magnitude greater than inductors, with these energy transfer elements typically consuming the majority of a power converter's weight/volume. Recent work has demonstrated significant potential for hybrid switched-capacitor-inductor converter techniques: here, small inductive element(s) are used to eliminate the conventional drawbacks of a converter which is predominantly capacitor based. The hybridized approach helps unlock the full potential of capacitor-based converters and has been demonstrated to offer compelling results at the cost of added complexity. This work offers an exploration into a collection of state-of-the-art power converter techniques and topological methods, primarily within the field of hybridized switched-capacitor-inductor converters. The first two chapters give a background on fundamental considerations such as conventional loss mechanisms and the slow-switching-limit (SSL), as well as several established loss mitigation techniques. An integrated converter system and its associated functional blocks is then discussed in Chapters 3 and 4, exemplifying a hybridized two-stage converter and illustrating the implementation of several loss mitigation methods and practical circuit techniques. Next, several hybridized variations of the Dickson topology are discussed: this family of DC-DC converters is well suited for non-isolated large voltage conversion ratios. A number of these variants are proposed here for the first time, illustrating significant potential for further converter development. The steady-state bias points, resonant switching frequency, duty cycle and voltage ripple as a function of load are calculated for several example converters, including the non-trivial case of a converter undergoing split-phase operation and whose operating points exhibit a strong load dependence. To facilitate comparative analysis between topologies, a mathematical method is presented that characterizes the total energy density utilization of fly capacitors throughout a converter, accounting for large voltage ripple and iii highly nonlinear reverse-bias transitions. This analysis assists with optimal topology selection as energy density utilization directly dictates the required capacitor volume at a specified power level and switching frequency. An expanded family of fly capacitor networks is then introduced in Chapter 6; here it is shown that there are a large number of unexplored yet practical fly capacitor configurations that are eligible for use in hybridized converters. It is calculated that a 6-7 % reduction in capacitor volume can be achieved relative to conventional Dickson fly capacitor networks, while preserving the desirable characteristic of equal voltage ripple on its branches. N-phase and split-phase switching methods and their respective trade-offs are then discussed in detail, offering control techniques that allow a departure from conventional two-phase operation while retaining high-efficiency zero-voltage and zero-current switching (ZVS/ZCS) conditions. A Cockcroft-Walton prototype demonstrates both methods implemented on the same piece of hardware, significantly improving the efficiency range with respect to load and resulting in a state-of-the-art power density of 483.3 kW/liter (7, 920W/inch3). Next, a method termed "resonant charge redistribution" (RCR) is proposed that greatly reduces output capacitance (C[subscript OSS]) related switching losses in all switches of a complex switched-capacitor network. Despite little effort being put towards optimization, a prototype using RCR measures a 61 % reduction in total losses at light load for a near negligible 0.74 % increase in total solution volume. Lastly, resonant gate drive techniques are discussed. Here, within a proposed resonant gate-driver topology, a capacitive decoupling technique is demonstrated that allows power to be delivered to a "flying" high-side N-channel device which commutes between two variable voltages. The implemented prototype achieves up to a 72 % reduction in gating loss when switching over 20 MHz and with rise/fall times ≤ 7 ns. Combining several of the novel techniques described herein can result in near complete mitigation of all primary switching loss mechanisms observed throughout the complex structure of a switched-capacitor converter network. This relatively new field of hybridized converter design has already yielded converters with record-breaking performance, as is demonstrated here. With contemporary techniques, including those described in this work, the field of power electronics is on the cusp of seeing widespread dramatic improvements in energy handling capability, power density, specific power and efficiency at reduced cost, with huge potential for growth and improved energy consumption in both developed and emerging markets.

Low Power Dc Dc Converters And A Low Quiescent Power High Psrr Class D Audio Amplifier

DOWNLOAD
Author : Joselyn Torres
language : en
Publisher:
Release Date : 2014

Low Power Dc Dc Converters And A Low Quiescent Power High Psrr Class D Audio Amplifier written by Joselyn Torres and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.

High-performance DC-DC voltage converters and high-efficient class-D audio amplifiers are required to extend battery life and reduce cost in portable electronics. This dissertation focuses on new system architectures and design techniques to reduce area and minimize quiescent power while achieving high performance. Experimental results from prototype circuits to verify theory are shown. Firstly, basics on low drop-out (LDO) voltage regulators are provided. Demand for system-on-chip solutions has increased the interest in LDO voltage regulators that do not require a bulky off-chip capacitor to achieve stability, also called capacitorless LDO (CL-LDO) regulators. Several architectures have been proposed; however, comparing these reported architectures proves difficult, as each has a distinct process technology and specifications. This dissertation compares CL-LDOs in a unified manner. Five CL-LDO regulator topologies were designed, fabricated, and tested under common design conditions. Secondly, fundamentals on DC-DC buck converters are presented and area reduction techniques for the external output filter, power stage, and compensator are proposed. A fully integrated buck converter using standard CMOS technology is presented. The external output filter has been fully-integrated by increasing the switching frequency up to 45 MHz. Moreover, a monolithic single-input dual-output buck converter is proposed. This architecture implements only three switches instead of the four switches used in conventional solutions, thus potentially reducing area in the power stage through proper design of the power switches. Lastly, a monolithic PWM voltage mode buck converter with compact Type-III compensation is proposed. This compensation scheme employs a combination of Gm-RC and Active-RC techniques to reduce the area of the compensator, while maintaining low quiescent power consumption and fast transient response. The proposed compensator reduces area by more than 45% when compared to an equivalent conventional Type-III compensator. Finally, basics on class-D audio amplifiers are presented and a clock-free current controlled class-D audio amplifier using integral sliding mode control is proposed. The proposed amplifier achieves up to 82 dB of power supply rejection ratio and a total harmonic distortion plus noise as low as 0.02%. The IC prototype's controller consumes 30% less power than those featured in recently published works. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/151705