Switchmode Power Supply Handbook

The definitive guide to switchmode power supply design--fully updated

Covering the latest developments and techniques, Switchmode Power Supply Handbook, third edition is a thorough revision of the industry-leading resource for power supply designers. New design methods required for powering small, high-performance electronic devices are presented. Based on the authors' decades of experience, the book is filled with real-world solutions and many nomograms, and features simplified theory and mathematical analysis.

This comprehensive volume explains common requirements for direct operation from the AC line supply and discusses design, theory, and practice. Engineering requirements of switchmode systems and recommendations for active power factor correction are included. This practical guide provides you with a working knowledge of the latest topologies along with step-by-step approaches to component decisions to achieve reliable and cost-effective power supply designs.

Switchmode Power Supply Handbook, third edition covers:

• Functional requirements of direct off-line switchmode power supplies
• Power components selection and transformer designs for converter circuits
• Transformer, choke, and thermal design
• Input filters, RFI control, snubber circuits, and auxiliary systems
• Active power factor correction system design
• Worked examples of would components
• Examples of fully resonant and quasi-resonant systems
• A resonant inverter fluorescent ballast
• An example of high-power phase shift modulated system
• A new MOSFET resonant inverter drive scheme
• A single-control, wide-range wave oscillator

Table of Contents
Part 1~Functions and Requirements Common to Most Direct-Off-Line Switchmode Power Supplies

1. Common Requirements: an Overview 2. AC Powerline Surge Protection 3. Electromagnetic Interference (EM) in Switchmode Power Supplies 4. Faraday Screens 5. Fuse Selection 6. Line Rectifictaion and Capacitor Input Filters for "Direct-Off-Line" Switchmode Power Supplies 7. Inrush Control 8. Start-Up Methods 9. Soft Start and Low-Voltage Inhibit 10. Turn-On Voltage Overshoot Prevention 11. Overvoltage Protection 12. Undervoltage Protection 13. Overload Protection 14. Foldback (Reentrant) Output Current Limiting 15. Base Drive Requirements for High-Voltage Bipolar transistors 16. Proportional Drive Circuits for Bipolar Transistors 17. Antisaturation Techniques for High-Voltage Transistors 18. Snubber Networks 19. Cross Conduction 20. Output Filters 21. Power Failure Warning Circuits 22. centering (Adjustment to Center) of Auxiliary Output Viltages on Multiple-Output Converters 23. Ausiliary Supply Systems 24.Parallel Operation of Voltage: Stabilized Power Supplies

Part 2~Desigh: Theory and Practice

1. Multiple-Output Flyback Switchmode Power Supplies 2. Flyback Transformer Design 3. Reducing Transistor Switching Stress 4. Slecting Power Components for Flyback Converters 5. The Diagonal Half-Bridge Flyback Converter 6. Self-Oscillating Direct-Off-Line Flyback Converters 7. Applying Current-Mode Control to Flyback Converters 8. Direct-Off-Line Single-Ended Forward Converters 9. Transformer Design for Forward Converters 10. Diagonal Half-Bridge Forward Converters 11. Transformer Desigh for Diagonal Half-Bridge FOrward Converters 12. Half-Bridge Push-Pull Duty-Ratio-Controlled Converters 13. Bridge Converters 14. Low-Power Self-Oscillating Ausiliary Converters 15. Single-Transformer Two-Transistor Self-Oscillating Converters 16. Two-Transformer Self-Oscillating Converters 17. The DC-to-DC Transformer Concept 18. Multiple-Output Compound Regulating Systems 19. Duty-Ratio-Controlled Push-Pull Converters 20. DC-to-DC Switching Regulators 21. High-Frequency Saturable Reactor Power Rebulators (Magnetic Duty Ratio Control) 22. Constant-Current Power Supplies 23. Variable Linear Power Supplies 24. Switchmode Variable Power Supplies 25. Switchmode Variable Power Supply Transformer Desigh

Part 3~Applied Design

1. Inductors and Chokes in Switchmode Supplies 2. High-Current Chokes Using Iron Powder Cores 3. Choke Design Using Iron Powder Toroidal Cores 4. Switchmode Transformer Design: General Principles 5. Optimum 150-W Transformer Design Example Using Nomograms 6. Transformer Staircase Saturation 7. Flux Doubling 8. Stability and Control-Loop Compensation in SMPS 9. The Right-Half-Plane Zero 10. Current-Mode Control 11. Optocouplers 12. Ripple Current Ratings for Electrolytic Capacitors in Switchmode Power Supplies 13. Noninductive Current Shunts 14. Current Transformers 15. Current Probes for Measurement Purposes 16. Thermal Management (In Switchmode Power Supplies)

Part 4~Supplementary

1. Active Power Factor Correction