Author: Peter G. GosselinPublisher:
ISBN:
Category :
Languages : en
Pages : 140
Book Description
Design for Assembly of High Frequency Switching Power Supplies
Author: Peter G. GosselinHigh Frequency Switching Power Supply Design and Analysis
Author: Ramesh MarimuthuPublisher:
ISBN:
Category : Electric transformers
Languages : en
Pages : 232
Book Description
Design and Implementation of High Frequency 3D DC-DC Converter
Author: Florian NeveuPublisher:
ISBN:
Category :
Languages : en
Pages : 218
Book Description
Ultimate integration of power switch-mode converter relies on two research paths. One path experiments the development of switched-capacitor converters. This approach fits silicon integration but is still limited in term of power density. Inductive DC-DC architectures of converters suffer by the values and size of passive components. This limitation is addressed with an increase in frequency. Increase in switching losses in switches leads to consider advanced technological nodes. Consequently, the capability with respect to input voltage is then limited. Handling 3.3 V input voltage to deliver an output voltage in the range 0.6 V to 1.2 V appears a challenging specification for an inductive buck converter if the smallest footprint is targeted at +90 % efficiency. Smallest footprint is approached through a 3D assembly of passive components to the active silicon die. High switching frequency is also considered to shrink the values of passive components as much as possible. In the context of on-chip power supply, the silicon technology is dictated by the digital functions. Complementary Metal-Oxide- Semiconductor (CMOS) bulk C40 is selected as a study case for 3.3 V input voltage. 3.3 V Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) features poor figure of merits and 1.2 V standard core, regular devices are preferred. Moreover future integration as an on-chip power supply is more compatible. A three-MOSFET cascode arrangement is experimented and confronted experimentally to a standard buck arrangement in the same technology. The coupled-phase architecture enables to reduce the switching frequency to half the operating frequency of the passive devices. +100MHz is selected for operation of passive devices. CMOS bulk C40 offers Metal-Oxide-Metal (MOM) and MOS capacitors, in density too low to address the decoupling requirements. Capacitors have to be added externally to the silicon die but in a tight combination. Trench-cap technology is selected and capacitors are fabricated on a separate die that will act as an interposer to receive the silicon die as well as the inductors. The work delivers an object containing a one-phase buck converter with the silicon die flip-chipped on a capacitor interposer where a tiny inductor die is reported. The one-phase demonstrator is suitable for coupled-phase demonstration. Standard and cascode configurations are experimentally compared at 100 MHz and 200 MHz switching frequency. A design methodology is presented to cover a system-to-device approach. The active silicon die is the central design part as the capacitive interposer is fabricated by IPDiA and inductors are provided by Tyndall National Institute. The assembly of the converter sub-parts is achieved using an industrial process. The work details a large set of measurements to show the performances of the delivered DC/DC converters as well as its limitations. A 91.5% peak efficiency at 100MHz switching frequency has been demonstrated.
Design Considerations for Radio Frequency Power Converters
Author: Lei Gu (Researcher in power electronics)Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Compact and efficient high-frequency power converters and amplifiers are needed in a variety of applications, including base stations, mobile devices, and medical equipment. The ever-growing need for a smaller size, longer battery life, and lower cost introduces challenging design considerations for radio-frequency power converters. Today, these radio-frequency resonant converters use harmonic tuning to shape the voltage or current waveform of the switching device, with the primary goals of reducing device stress and increasing achievable efficiency. Although harmonic-tuned resonant converters can be very compact and efficient for a certain condition, significant challenges remain to widespread adoption, including limited high-efficiency range, complicated design procedures, and higher device stress compared with conventional approaches. This thesis presents circuit techniques that can extend the voltage, frequency, and efficiency ranges of radio-frequency power converters and provides more straightforward analysis and easy-to-implement design procedures. This thesis first presents a multi-resonant gate driver circuit developed using the harmonic wave-shaping technique that significantly reduces the high-frequency gate driving losses for Si and SiC MOSFETs. By controlling different harmonic components of an ideal square wave, we can resonantly shape a quasi-square voltage waveform at the gate. This gate driver is simple to control and has a low component count. Compared with a sine wave gate signal, this method reduces the transition time between the MOSFET is fully enhanced and turned-off, driving down the switching losses. Compared with similar multi-resonant drivers that are self-oscillating, this driver reduces the long start-up time required to reach steady-state. Intuitive design methodologies based on the frequency-domain plot are introduced. Using this technique, we are able to resonantly drive a Si MOSFET at 20 MHz and recycle 60% of the hard-switching gate-driving loss. We also demonstrate this driver on a SiC MOSFET switching at 30 MHz and save 80% of the hard-switching loss. Modern applications demand power converters to maintain a constant voltage output with high efficiency across significant load variation. This thesis presents a bidirectional dc-dc converter that enables efficient fixed-ratio voltage conversion at tens of megahertz. By selecting a proper matching network for the intermediate gain stage, we address multiple challenges simultaneously; a) replacing a lossy passive diode with a more efficient active transistor, b) maintaining efficient soft-switching operation, and c) a constant voltage conversion ratio over a wide load range. A 64 MHz, 12 W, 36 V-to-12 V prototype converter with 75% peak efficiency verifies the operation of the structure. An interleaved configuration is then proposed to improve the efficiency and transient performance of a single-phase structure. A 13.56 MHz, 210 V-to-30 V prototype converter with 90% peak efficiency at 200 W demonstrates the advantages of this proposed structure. RF power amplifiers underpin many systems that support our modern infrastructure. The Class EF and E/F family of harmonic-tuned switch-mode amplifiers have simple gate drives, reduced voltage stress, and higher output power capabilities than a conventional Class E circuit. To best utilize the performance potential of this family of circuits, this thesis presents a novel push-pull Phi2 (EF2) amplifier using interleaving and series-stacking techniques, denoted as a PPT Phi2 circuit. This series-stacked PPT Phi2 circuit combines all of the main advantages of different topologies, like the simplicity of gate driving, highest cut-off frequency, lowest voltage stress, and load-invariant operation. A compact 6.78 MHz, 100 V, 300 W prototype converter is demonstrated. Using lowcost Si devices, the prototype converter achieves 96% peak total efficiency and maintains above 94.5% drain efficiency across a wide range of voltage and power. This new series-stacked PPT F2 RF amplifier doubles the maximum operating frequency and voltage range of a Class EF or E/F amplifier with benefits in many modern applications that require high-frequency high-power RF signals, like wireless charging for electric vehicles, plasma RF drives, and nuclear magnetic resonance (NMR) spectroscopy.
Practical Volume-reduction Strategies for Low-power High-frequency Switch Mode Power Supplies
Author: Aleksandar RadicDesign Techniques for High-frequency High-efficiency High-voltage Soft-switched Power Converters
Author: Jing Xue (Electrical engineer)Publisher:
ISBN:
Category : High voltages
Languages : en
Pages : 198
Book Description
Power management Integrated circuits (ICs) have been used for providing constant and reliable supply voltages for different electronic circuits from unregulated voltages. About 80% of today’s power management ICs are designed to handle a high-voltage (HV) input range above 6 V. The HV power ICs can reduce the bill-of-material (BOM) cost and improve system reliability without compromising the system performance. It is crucial to maximize the power density and power efficiency of HV power converters. Operating the converter at a higher switching frequency would result in smaller converter volume and lower BOM cost but the large switching loss in conventional hard-switching HV power converters would significantly decrease the power efficiency. This dissertation develops a non-isolated QSW-ZVS boost converter by minimizing the switching power loss to achieve high power efficiency under high-frequency and HV conditions. The proposed converter achieves 92.7% at 1 MHz while increasing the switching frequency by at least 15x in comparison with the state-of-the-art counterparts. An effective gate driver is important to provide fast propagation delays with low power dissipation in the MHz range and generate appropriate dead-time to assist the ZVS operation under different conditions. An on-chip synchronous gate driver with automatic dead-time controller for GaN-based HV three-level converters is proposed in this dissertation. The proposed gate driver achieves ≤ 15-ns delays with 50-V/ns noise immunity and enables a 100-V 35-W isolated three-level half-bridge converter to achieve the peak power efficiencies of 90.7% at 2 MHz. The three-level converter can also be used to reduce the value of passive components. To maximize the benefits of three-level converters, the voltage across the flying capacitor must be controlled to half of the input voltage under different conditions. This dissertation develops a 2-MHz 12-V – 100-V integrated ZVS three-level DC-DC regulator. The constant-frequency adaptive-on-time V2 control enables the flying-capacitor self-balancing at 2 MHz over a wide input range. The body-diode based floating ZVS detector enables full ZVS in high-frequency low-duty-ratio operation with ≤ 5-ns ZVS turn-on delay. The proposed regulator achieves 90% peak power efficiency with more than 66x reduction in inductance compared with the state-of-the-art wide-input-range voltage regulators.
High-frequency Switching Power Supplies
Author: George ChryssisPublisher: McGraw-Hill Companies
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 312
Book Description
Switching Power Supply Design, 3rd Ed.
Author: Abraham PressmanPublisher: Mcgraw-hill
ISBN: 9780071482721
Category : Technology & Engineering
Languages : en
Pages : 848
Book Description
The World's #1 Guide to Power Supply Design Now Updated! Recognized worldwide as the definitive guide to power supply design for over 25 years, Switching Power Supply Design has been updated to cover the latest innovations in technology, materials, and components. This Third Edition presents the basic principles of the most commonly used topologies, providing you with the essential information required to design cutting-edge power supplies. Using a tutorial, how-and-why approach, this expert resource is filled with design examples, equations, and charts. The Third Edition of Switching Power Supply Design features: Designs for many of the most useful switching power supply topologies The core principles required to solve day-to-day design problems A strong focus on the essential basics of transformer and magnetics design New to this edition: a full chapter on choke design and optimum drive conditions for modern fast IGBTs Get Everything You Need to Design a Complete Switching Power Supply: Fundamental Switching Regulators * Push-Pull and Forward Converter Topologies * Half- and Full-Bridge Converter Topologies * Flyback Converter Topologies * Current-Mode and Current-Fed Topologies * Miscellaneous Topologies * Transformer and Magnetics Design * High-Frequency Choke Design * Optimum Drive Conditions for Bipolar Power Transistors, MOSFETs, Power Transistors, and IGBTs * Drive Circuits for Magnetic Amplifiers * Postregulators * Turn-on, Turn-off Switching Losses and Low Loss Snubbers * Feedback-Loop Stabilization * Resonant Converter Waveforms * Power Factor and Power Factor Correction * High-Frequency Power Sources for Fluorescent Lamps, and Low-Input-Voltage Regulators for Laptop Computers and Portable Equipment
Masters Theses in the Pure and Applied Sciences
Author: Wade H. ShaferPublisher: Springer Science & Business Media
ISBN: 1461534747
Category : Science
Languages : en
Pages : 421
Book Description
Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) * at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all con cerned if the printing and distribution of the volumes were handled by an interna tional publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Cor poration of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 34 (thesis year 1989) a total of 13,377 theses titles from 26 Canadian and 184 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this important annual reference work. While Volume 34 reports theses submitted in 1989, on occasion, certain univer sities do report theses submitted in previous years but not reported at the time.
EMC for Product Designers
Author: Tim WilliamsPublisher: Elsevier
ISBN: 0080505600
Category : Technology & Engineering
Languages : en
Pages : 513
Book Description
Tim Williams has worked for a variety of companies as an electronic design engineer over the last 20 years. He has monitored the progress of the EMC Directive and its associated standards since it was first made public. He is a member of the Institution of Electrical Engineers and now runs his own consultancy, specialising in EMC design and training. *Save money on consultancy bills with this book *Practical guide to implementing EMC within the product design process *The leading professional guide to the EMC Directive -100% up-to-date and reliable