Book description
Switching Power Supplies A  Z is the most comprehensive study available of the theoretical and practical aspects of controlling and measuring Electromagnetic Interference in switching power supplies, including input filter instability considerations.
The new edition is thoroughly revised with six completely new chapters, while the existing EMI chapters are expanded to include many more stepbystep numerical examples and key derivations and EMI mitigation techniques. New topics cover the length and breadth of modern switching power conversion techniques, lucidly explained in simple but thorough terms, now with uniquely detailed "wallreference charts" providing easy access to even complex topics.
 Stepbystep and iterative approach for calculating highfrequency losses in forward converter transformers, including Proximity losses based on Dowell's equations
 Thorough, yet uniquely simple design flowchart for building DCDC converters and their magnetic components under typical wideinput supply conditions
 Stepbystep, solved examples for stabilizing control loops of all three major topologies, using either transconductance or conventional operational amplifiers, and either currentmode or voltagemode control
Table of contents
 Cover Image
 Contents
 Title
 Copyright
 Preface
 Acknowledgments
 Chapter 1. The Principles of Switching Power Conversion

Chapter 2. DC–DC Converter Design and Magnetics
 DC Transfer Functions
 The DC Level and the “Swing” of the Inductor Current Waveform
 Defining the AC, DC, and Peak Currents
 Understanding the AC, DC, and Peak Currents
 Defining the “WorstCase” Input Voltage
 The Current Ripple Ratio “r”
 Relating r to the Inductance
 The Optimum Value of r
 Do We Mean Inductor? or Inductance?
 How Inductance and Inductor Size Depend on Load Current
 How Vendors Specify the Current Rating of an Offtheshelf Inductor and How to Select It
 What Is the Inductor Current Rating We Need to Consider for a Given Application?
 The Spread and Tolerance of the Current Limit
 Worked Example (1)
 Worked Examples (2, 3, and 4)
 Worked Example (5) — When Not to Increase the Number of Turns
 Worked Example (6) — Characterizing an OfftheShelf Inductor in a Specific Application
 Calculating “Other” Worstcase Stresses and their Selection Criteria
 Chapter 3. OffLine Converter Design and Magnetics
 Chapter 4. The Topology FAQ
 Chapter 5. Advanced Magnetics
 Chapter 6. Component Ratings, Stresses, Reliability, and Life

Chapter 7. Optimal Power Components Selection
 Overview
 The Key Stresses in Power Converters
 Waveforms and Peak Voltage Stresses for Different Topologies
 The Importance of RMS and Average Currents
 Calculation of RMS and Average Currents for Diode, FET, and Inductor
 Calculation of RMS and Average Currents for Capacitors
 The Stress Spiders
 Stress Reduction in AC–DC Converters
 RCD Clamps versus RCD Snubbers

Chapter 8. Conduction and Switching Losses
 Switching a Resistive Load
 Switching an Inductive Load
 Switching Losses and Conduction Loss
 A Simplified Model of the MOSFET for Studying Inductive Switching Losses
 The Parasitic Capacitances Expressed in an Alternate System
 Gate Threshold Voltage
 The TurnOn Transition
 The TurnOff Transition
 Gate Charge Factors
 Worked Example
 Applying the Switching Loss Analysis to Switching Topologies
 WorstCase Input Voltage for Switching Losses
 How Switching Losses Vary with the Parasitic Capacitances
 Optimizing Driver Capability visàvis MOSFET Characteristics

Chapter 9. Discovering New Topologies
 Part 1: FixedFrequency Synchronous Buck Topology
 Part 2: FixedFrequency Synchronous Boost Topology
 Part 3: CurrentSensing Categories and General Techniques
 Part 4: The FourSwitch BuckBoost
 Part 5: Auxiliary Rails and Composite Topologies
 Part 6: Configurations and “Topology Morphology”
 Part 7: Other Topologies and Techniques
 Chapter 10. Printed Circuit Board Layout
 Chapter 11. Thermal Management

Chapter 12. Feedback Loop Analysis and Stability
 Transfer Functions, Time Constant, and the Forcing Function
 Understanding “e” and Plotting Curves on Log Scales
 Flashback: Complex Representation
 Repetitive and Nonrepetitive Stimuli: Time Domain and Frequency Domain Analyses
 The sPlane
 Laplace Transform Method
 Disturbances and the Role of Feedback
 Transfer Function of the RC Filter, Gain, and the Bode Plot
 The Integrator Opamp (“PoleatZero” Filter)
 Mathematics in the LogPlane
 Transfer Function of the PostLC Filter
 Summary of Transfer Functions of Passive Filters
 Poles and Zeros
 “Interactions” of Poles and Zeros
 Closed and OpenLoop Gain
 The Voltage Divider
 PulseWidth Modulator Transfer Function
 Voltage (Line) Feedforward
 Power Stage Transfer Function
 Plant Transfer Functions of All the Topologies
 FeedbackStage Transfer Functions
 Closing the Loop
 Criteria and Strategy for Ensuring Loop Stability
 Plotting the OpenLoop Gain for the Three Topologies
 The ESRZero
 HighFrequency Pole
 Designing a Type 3 OpAmp Compensation Network
 Optimizing the Feedback Loop
 Input Ripple Rejection
 Load Transients
 Type 1 and Type 2 Compensations
 Transconductance OpAmp Compensation
 Simpler Transconductance OpAmp Compensation
 Compensating with CurrentMode Control
 Chapter 13. Advanced Topics
 Chapter 14. The Front End of AC–DC Power Supplies
 Chapter 15. EMI Standards and Measurements
 Chapter 16. Practical EMI Line Filters and Noise Sources in Power Supplies
 Chapter 17. Fixing EMI Across the Board and Input Filter Instability
 Chapter 18. The Math Behind the Electromagnetic Puzzle

Chapter 19. Solved Examples
 Part 1: FET Selection
 Part 2: Conduction Losses in the FETs
 Part 3: FET Switching Losses
 Part 4: Inductor Loss
 Part 5: Input Capacitor Selection and Loss
 Part 6: Output Capacitor Selection and Loss
 Part 7: Total Losses and Efficiency Estimate
 Part 8: Junction Temperature Estimates
 Part 9: Control Loop Design
 Appendix
 Index
Product information
 Title: Switching Power Supplies A  Z, 2nd Edition
 Author(s):
 Release date: May 2012
 Publisher(s): Newnes
 ISBN: 9780123865342
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