Power_Supply_Cookbook_2E.pdf

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Power

Supply

Cookbook

Second Edition

Marty Brown

Boston Oxford Johannesburg Melbourne New Delhi

Newnes is an imprint of Butterworth–Heinemann.

A member of the Reed Elsevier group

No part of this publication may be reproduced, stored in a retrieval system, or

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Library of Congress Cataloging-in-Publication Data

Brown, Marty.

Power supply cookbook / Marty Brown.—2nd ed.

p. cm.

Includes bibliographical references and index.

ISBN 0-7506-7329-X

1. Electric power supplies to apparatus—Design and construction.

2. Power electronics. 3. Electronic apparatus and appliances—power

supply. I. Title.

TK7868.P6 B76 2001

621.381¢044—dc21

00-050054

British Library Cataloguing-in-Publication Data

A catalogue record for this book is available from the British Library.

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Printed in the United States of America

Contents

Preface ix

Introduction xi

1. The Role of the Power Supply within the System and the

Design Program

1.1 Getting Started. This Journey Starts with the First Question 1

1.2 Power System Organization 2

1.3 Selecting the Appropriate Power Supply Technology 3

1.4 Developing the Power System Design Speciﬁcation 5

1.5 A Generalized Approach to Power Supplies: Introducing the

Building-block Approach to Power Supply Design 8

1.6 A Comment about Power Supply Design Software 9

1.7 Basic Test Equipment Needed 9

2. An Introduction to the Linear Regulator

2.1 Basic Linear Regulator Operation 11

2.2 General Linear Regulator Considerations 12

2.3 Linear Power Supply Design Examples 14

2.3.1 Elementary Discrete Linear Regulator Designs 15

2.3.2 Basic 3-Terminal Regulator Designs 15

2.3.3 Floating Linear Regulators 18

3. Pulsewidth Modulated Switching Power Supplies

3.1 The Fundamentals of PWM Switching Power Supplies 21

3.1.1 The Forward-mode Converter 22

3.1.2 The Boost-mode Converter 24

3.2 The Building-block Approach to PWM Switching Power Supply

Design 26

3.3 Which Topology of PWM Switching Power Supply to Use? 28

3.4 The “Black Box” Considerations for Switching Power Supplies 34

3.5 Design of the Magnetic Elements 37

3.5.1 The Generalized Design Flow of the Magnetic Elements 37

3.5.2 Determining the Size of the Magnetic Core 38

3.5.3 Designing the Forward-mode Transformer 40

3.5.4 Designing the Flyback Transformer 42

3.5.5 Designing the Forward-mode Filter Choke 46

3.5.6 Designing the Mutually Coupled, Forward-mode Filter Choke 47

3.5.7 Designing the dc Filter Choke 48

3.5.8 Base and Gate Drive Transformers 50

3.5.9 Winding Techniques for Switchmode Transformers 52

3.6 The Design of the Output Stages 56

3.6.1 The Passive Output Stage 58

Power Supply Cookbook

Second Edition

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