Demystifying Switching Power Supplies -  Raymond A. Mack

Demystifying Switching Power Supplies (eBook)

eBook Download: PDF
2011 | 1. Auflage
344 Seiten
Elsevier Science (Verlag)
978-0-08-047710-7 (ISBN)
Systemvoraussetzungen
53,85 inkl. MwSt
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This book is a crash course in the fundamental theory, concepts, and terminology of switching power supplies. It is designed to quickly prepare engineers to make key decisions about power supplies for their projects.

Intended for readers who need to quickly understand the key points of switching power supplies, this book covers the 20% of the topic that engineers use, 80% of the time.

Unlike existing switching power supply books that deal strictly with design issues, this book also recognizes the growing importance of off-the-shelf commercial switching power supplies, giving readers the background necessary to select the right commercial supply.

This book covers the core essentials of power supply theory and design while keeping mathematics to the absolute minimum necessary. Special attention is given to the selection of appropriate components, such as inductors and transformers, to ensure safe and reliable operation. Engineers, whose main design responsibilities are in other areas, will better understand the strengths and weaknesses of switching power supplies and whether such supplies are appropriate for their projects. They will be able to give more meaningful design requirements and specifications to those who design switching power supplies.

* Discusses both AC line supplies and DC-DC inverters.

* Covers the main switching power supply designs, including flyback, forward conversion, bridge, buch, boost, and boost/buck topologies.

* Design examples include a 220 volt offline switching power supply and a 110 volt uninterruptible supply.
This book is a crash course in the fundamental theory, concepts, and terminology of switching power supplies. It is designed to quickly prepare engineers to make key decisions about power supplies for their projects.Intended for readers who need to quickly understand the key points of switching power supplies, this book covers the 20% of the topic that engineers use, 80% of the time. Unlike existing switching power supply books that deal strictly with design issues, this book also recognizes the growing importance of "e;off-the-shelf"e; commercial switching power supplies, giving readers the background necessary to select the right commercial supply. This book covers the core essentials of power supply theory and design while keeping mathematics to the absolute minimum necessary. Special attention is given to the selection of appropriate components, such as inductors and transformers, to ensure safe and reliable operation. Engineers, whose main design responsibilities are in other areas, will better understand the strengths and weaknesses of switching power supplies and whether such supplies are appropriate for their projects. They will be able to give more meaningful design requirements and specifications to those who design switching power supplies.* Discusses both AC line supplies and DC-DC inverters.* Covers the main switching power supply designs, including flyback, forward conversion, bridge, buch, boost, and boost/buck topologies.* Design examples include a 220 volt offline switching power supply and a 110 volt uninterruptible supply.

Cover 1
Table of contents 6
Preface 10
Introduction 12
Chapter One: Basic Switching Circuits 16
Energy Storage Basics 18
Buck Converter 19
Boost Converter 21
Inverting Boost Converter 24
Buck-Boost Converter 25
Transformer Isolated Converters 26
Synchronous Rectification 31
Charge Pumps 32
Chapter Two: Control Circuits 36
Basic Control Circuits 38
The Error Amplifier 41
Error Amplifier Compensation 43
A Representative Voltage Mode PWM Controller 48
Current Mode Control 54
A Representative Current Mode PWM Controller 56
Charge Pump Circuits 60
Multiple Phase PWM Controllers 64
Resonant Mode Controllers 65
Chapter Three: The Input Power Supply 66
Off-Line Operation 68
Radio Interference Suppression 70
Safety Agency Issues 72
Power Factor Correction 75
In-Rush Current 79
Hold-Up Time 81
Input Rectifier Considerations 84
Input Reservoir Capacitor Characteristics 85
Chapter Four: Non-Isolated Circuits 88
General Design Method 90
Buck Converter Designs 91
Boost Converter Designs 101
Inverting Designs 109
Step Up/Step Down (Buck/Boost) Designs 112
Charge Pump Designs 117
Layout Considerations 122
Chapter Five: Transformer-Isolated Circuits 126
Feedback Mechanisms 128
Flyback Circuits 136
Practical Flyback Circuit Design 144
Off-Line Flyback Example 144
Non-Isolated Flyback Example 152
Forward Converter Circuits 156
Practical Forward Converter Design 158
Off-Line Forward Converter Example 159
Non-Isolated Forward Converter Example 163
Push-Pull Circuits 167
Practical Push-Pull Circuit Design 169
Half Bridge Circuits 173
Practical Half Bridge Circuit Design 176
Full Bridge Circuits 179
Chapter Six: Passive Component Selection 182
Capacitor Characteristics 184
Aluminum Electrolytic Capacitors 186
Solid Tantalum and Niobium Capacitors 188
Solid Polymer Electrolytic Capacitors 190
Multilayer Ceramic Capacitors 191
Film Capacitors 195
Resistor Characteristics 196
Carbon Composition Resistors 198
Film Resistors 198
Wire Resistors 199
Chapter Seven: Semiconductor Selection 202
Diode Characteristics 204
Junction Diodes 204
Schottky Diodes 209
Passivation 212
Bipolar Transistors 212
Power MOSFETs 219
Gate Drive 223
Safe Operating Area and Avalanche Rating 234
Synchronous Rectification 237
Sense FETs 244
Package Options 244
IGBT Devices 245
Chapter Eight: Inductor Selection 250
Properties of Real Inductors 252
Core Properties 255
Designing a Powder Toroid Choke Core 265
Choosing a Boost Converter Core 271
Chapter Nine: Transformer Selection 276
Transformer Properties 278
Safety Concerns 281
Practical Construction Considerations 282
Choosing a Forward Converter Transformer Core 286
Practical Flyback Core Considerations 287
Choosing a Flyback Converter “Transformer” Core 288
Chapter Ten: A True Sine WaveŽ Inverter Design Example 292
Design Requirements 294
Design Description 295
Preregulator Detailed Design 301
Output Converter Detailed Design 305
H Bridge Detailed Design 308
Bridge Drive Detailed Design 311
Chapter Eleven: A PC Off-Line Supply 314
Setting Requirements 316
The Input Supply 317
DC–DC Converter 320
Diode Selection 324
Inductor Designs 325
Capacitor Designs 329
Transformer Design 330
Index 334

Erscheint lt. Verlag 14.3.2011
Sprache englisch
Themenwelt Sachbuch/Ratgeber
Technik Elektrotechnik / Energietechnik
Technik Maschinenbau
ISBN-10 0-08-047710-0 / 0080477100
ISBN-13 978-0-08-047710-7 / 9780080477107
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