Integrated High-Vin Multi-MHz Converters
This book provides readers with guidelines for designing integrated multi-MHz-switching converters for input voltages/system supplies up to 50V or higher. Coverage includes converter theory, converter architectures, circuit design, efficiency, sizin
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Integrated High-Vin Multi-MHz Converters
Integrated High-V in Multi-MHz Converters
J¨urgen Wittmann
Integrated High-V in Multi-MHz Converters
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J¨urgen Wittmann Gr¨obenzell Bayern, Germany
ISBN 978-3-030-25256-4 ISBN 978-3-030-25257-1 (eBook) https://doi.org/10.1007/978-3-030-25257-1 © Springer Nature Switzerland AG 2020 This work is subject to copyright. All rights are reserved by the Publisher, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, reuse of illustrations, recitation, broadcasting, reproduction on microfilms or in any other physical way, and transmission or information storage and retrieval, electronic adaptation, computer software, or by similar or dissimilar methodology now known or hereafter developed. The use of general descriptive names, registered names, trademarks, service marks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. The publisher, the authors, and the editors are safe to assume that the advice and information in this book are believed to be true and accurate at the date of publication. Neither the publisher nor the authors or the editors give a warranty, express or implied, with respect to the material contained herein or for any errors or omissions that may have been made. The publisher remains neutral with regard to jurisdictional claims in published maps and institutional affiliations. This Springer imprint is published by the registered company Springer Nature Switzerland AG. The registered company address is: Gewerbestrasse 11, 6330 Cham, Switzerland
To my beloved family, Heloisa and Sebastian, and to my parents, Anna and Franz.
Preface
The work for this book was initially driven by automotive applications, with the goal to do research on how point-of-load voltage converters, supplying electronic components, can be made smaller and cheaper in order to reduce size and cost of the electronics. The main objective was to investigate the impact of an increasing switching frequency into the multi-MHz range to reduce the size of the passives in inductive switching converters. The initial target was to supply the converters directly from a conventional 12 V car battery. As automotive applications need to tolerate largely varying battery voltages up to 40 V and above, it was set by the applications that the increase of the switching frequency needs to be investigated in combination with high input voltages of the converters. This combination represents a main limitation not only for the converter efficiency but also for the circuit design, which has been the main driver for this work. During the research of the work for this book, a trend emerged in several applications to increase the system supply voltage. Higher supply voltages enable a more efficient power delivery to the electronic components with lower currents and thus lower wiring costs. In consequence, the maxi
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