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power supply cookbook, second edition, 2001.pdf
(3.77 MB, 下载次数: 1854 )
1. The Role of the Power Supply within the System and the 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 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 3.6.2 Active Output Stages (Synchronous Rectifiers) 60 3.6.3 The Output Filter 61 3.7 Designing the Power Switch and Driver Section 63 3.7.1 The Bipolar Power Transistor Drive Circuit 63 3.7.2 The Power MOSFET Power Switch 66 3.7.3 The IGBT as a Power Switch 69 3.8 Selecting the Controller IC 70 3.8.1 Short Overview of Switching Power Supply Control 71 3.8.2 Selecting the Optimum Control Method 72 3.9 Designing the Voltage Feedback Circuit. 75 3.10 Start-up and IC Bias Circuit Designs 80 3.11 Output Protection Schemes 82 3.12 Designing the Input Rectifier/Filter Section 84 3.13 Additional Functions Normally Associated with Power Supplies 90 3.13.1 Synchronization of the Power Supply to an External Source 90 3.13.2 Input, Low Voltage Inhibit 91 3.13.3 Impending Loss of Power Signal 92 3.13.4 Output Voltage Shut-down 93 3.14 Laying Out the Printed Circuit Board 93 3.14.1 The Major Current Loops 93 3.14.2 The Grounds Inside the Switching Power Supply 96 3.14.3 The AC Voltage Node 98 3.14.4 Paralleling Filter Capacitors 99 3.14.5 The Best Method of Creating a PCB for a Switching Power 3.15 PWM Design Examples 100 3.15.1 A Board-level 10-Watt Step-down Buck Converter 100 3.15.2 Low Cost, 28 Watt PWM Flyback Converter 105 3.15.3 65 Watt, Universal AC Input, Multiple-output Flyback 3.15.4 A 280 Watt, Off-line, Half-bridge Converter 122 4. Waveshaping Techniques to Improve Switching Power Supply 4.1 Major Losses within the PWM Switching Power Supply 135 4.1.1 The Major Parasitic Elements within a Switching Power Supply 142 4.2 Techniques for Reducing the Major Losses 143 4.3.1 Design of the Traditional Snubber 145 4.3.2 The Passive Lossless Snubber 146 4.5 Saturable Inductors to Limit Rectifier Reverse Recovery 4.6 Quasi-resonant Converters 151 4.6.1 Quasi-resonant Converter Fundamentals 151 4.6.2 Quasi-resonant Switching Power Supply Topologies 155 4.6.3 Designing the Resonant Tank Circuit 156 4.6.4 Phase Modulated PWM Full-bridge Converters 161 4.7 High Efficiency Design Examples 163 4.7.1 A 10 Watt Synchronous Buck Converter 163 4.7.2 A 15 Watt, ZVS, Quasi-resonant, Current-mode Controlled Flyback 4.7.3 A Zero-voltage Switched Quasi-resonant Off-line Half-bridge Appendix A. Thermal Analysis and Design A.1 Developing the Thermal Model 187 A.2 Power Packages on a Heatsink (TO-3, TO-220, A.3 Power Packages Not on a Heatsink (Free Standing) 190 A.4 Radial-leaded Diodes 191 A.5 Surface Mount Parts 192 A.6 Examples of Some Thermal Applications 193 A.6.1 Determine the Smallest Heatsink (or Maximum Allowed Thermal Resistance) for an Application 193 A.6.2 Determine the Maximum Power That Can Be Dissipated by a Three-Terminal Regulator at the Maximum Specified Ambient Temperature without a Heatsink 194 A.6.3 Determine the Junction Temperature of a Rectifier with a Known Lead Temperature 195 Appendix B. Feedback Loop Compensation B.1 The Bode Response of Common Circuits Encountered in Switching Power Supplies 196 B.2 Defining the Open Loop Response of the Switching Power Supply—The Control-to-Output Characteristics 201 B.2.1 The Voltage-mode Controlled, Forward-mode B.2.2 Flyback Converters and Current-mode Forward Converter Control-to-Output Characteristics 203 B.3 The Stability Criteria Applied to Switching Power B.4 Common Error Amplifier Compensation Techniques 206 B.4.1 Single-pole Compensation 207 B.4.2 Single-pole Compensation with In-band Gain B.4.3 Pole-zero Compensation 212 B.4.4 2-Pole–2-Zero Compensation 216 Appendix C. Power Factor Correction C.1 A Universal Input, 180 Watt Active Power Factor Correction Appendix D. Magnetism and Magnetic Components D.1 Basic Magnetic Theory Applied to Switching Power D.2 Selecting the Core Material and Style 236 Appendix E. Noise Control and Electromagnetic Interference E.1 The Nature and Sources of Electrical Noise 241 E.2 Typical Sources of Noise 243 E.4 Conducted EMI Filters 245 Appendix F. Miscellaneous Information F.1 Measurement Unit Conversions 250
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发表于 2007-12-13 10:29:10
