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Robust Power Supply Design in a Supply-Chain-Challenged World

Ron Lenk (Author)

9781394343027, Wiley

Hardback, published 15 May 2026

320 pages
22.9 x 15.2 x 2.1 cm, 0.558 kg

An expert discussion with notes for the hobbyist on how to design power supplies while avoiding supply chain vulnerabilities

In Robust Power Supply Design in a Supply-Chain-Challenged World, engineer and power electronics specialist Ron Lenk delivers a comprehensive guide that delves into the intricacies of designing high-performance power supplies that use exclusively multi-source components. After considering robust passive and active components and how to do successful modeling with LTSpice, Lenk focuses on concrete, detailed examples of the design of robust power supplies.

Robust design examples include:

  • A 500mV output LDO;
  • A 5mW Boost converter;
  • A 24W Passive PFC circuit;
  • A 48-to-1V, 100A Bang-Bang Converter with Synchronous Rectification for an automotive AI chip;
  • A 277VAC, 5000W PFC for LED stadium lighting; and
  • An off-line 22KW, 2MHz four-slice EV charger

… plus many other topical examples, all designed with little more than op-amps, comparators and 555 timers.

Readers will also find:

  • A thorough introduction to multiple types of converters, including bang-bang, PWM, and PFC
  • Detailed specifications, design principles, and simulation of robust converters
  • Practical discussions of high-speed and high-precision designs, and of system optimization
  • Treatment of reliability calculations and special topics such as current limiting and negative voltage generation

Perfect for power supply engineers, Robust Power Supply Design in a Supply-Chain-Challenged World will also benefit graduate and senior undergraduate students with an interest in power electronics and power systems. Each chapter has a special section with tips for the Hobbyist interested in designing and building their own power supplies.

List of Figures xv
List of Tables xxi
About the Author xxiii
Preface xxv Acronyms xxxi
About the Companion Website xxxiii

1 Safety 1
1.1 AC Safety 1
1.2 Battery Safety 3
1.3 Notes for the Hobbyist 4

2 Background Material 7
2.1 Why a Power Supply? 7
2.2 Characterizing Power 7
2.3 Topologies and Controls 9
2.4 Measuring Power Supplies 10
2.5 Modeling 11
2.6 Notes for the Hobbyist 11

3 Components 13
3.1 Passive Components 13
3.2 Magnetic Components 20
3.3 Mag-amps 24
3.4 Active Components 24
3.5 Printed Circuit Boards 34
3.6 Other Topics in Component Selection 34
3.7 Notes for the Hobbyist 40

4 Modeling 41
4.1 Precautionary Introduction to Modeling 41
4.2 Overview of Simulating 42
4.3 Robust Simulation 44
4.4 Passive Components 46
4.5 Active Components 49
4.6 Modeling the 9910 71
4.7 Isolation 75
4.8 Modeling AC Power 76
4.9 Modeling EMI 77
4.10 Spice Directives 79
4.11 Controlling Spice 80
4.12 Things to Watch Out for When Modeling 81
4.13 Notes for the Hobbyist 82

5 Low Dropout Regulators 85
5.1 LDO Specifications 86
5.2 Shunt Regulators 89
5.3 LDO Design 89
5.4 Example: Very Low Dropout LDO 94
5.5 Example: Very Low Output Voltage LDO 100
5.6 Example: High Voltage LDO 104
5.7 Example: Negative Output LDO 107
5.8 Notes for the Hobbyist 109

6 Bang–Bang Converters 111
6.1 What a Bang–Bang Converter Is 111
6.2 Component Selection 113
6.3 Example: 5–1.8 V at 2 A 117
6.4 Improving Efficiency 123
6.5 Example: 4–1 V at 100 A 127
6.6 Example: Bang–Bang Boost 133
6.7 Example: Multi-slice Bang–Bang 137
6.8 Example: Very Low Current 141
6.9 Notes for the Hobbyist 147

7 PWM Converters 149
7.1 Introduction to PWMs 149
7.2 Robust PWMs 151
7.3 Components of PWMs 152
7.4 Example: Buck 10 W 158
7.5 Example: Boost 100 W 166
7.6 Example: Buck Multi-slice 22 kW 175
7.7 Notes for the Hobbyist 192

8 PFC Converters 193
8.1 Basic Idea of PFC 193
8.2 Example: Passive PFC 193
8.3 Constant On-time Controller 195
8.4 Example: 120 V AC, 100 W 199
8.5 Example: 230 V AC, 100 W 207
8.6 The 9910 as a PFC 209
8.7 Example: PFC 277 V AC, 5,000 W 210
8.8 Notes for the Hobbyist 213

9 Isolated Converters 215
9.1 Isolated Power Configurations 215
9.2 The Transformer 217
9.3 Control of an Isolated Converter 219
9.4 Multi-output Converters 222
9.5 Cascaded Power Supply Stability 223
9.6 Example: PFC to 48 V at 2 A 223
9.7 Example: System Model 230
9.8 Example: PFC to 1kV at 300mA 233
9.9 Example: Offline 900W Battery Charger 238
9.10 Isolated Synchronous Rectification 246
9.11 Notes for the Hobbyist 249

10 Special Topics 251
10.1 Better Performance 251
10.2 Current Limit 255
10.3 Negative Voltages 266
10.4 Lightning 268
10.5 Communications 270
10.6 Optimization 272
10.7 Daughter Boards 275
10.8 Notes for the Hobbyist 275
10.9 Loading the Analysis Toolpak 276
10.10 Modeling an MOV 276

Bibliography 281
Index 283

Subject Areas: Electronics & communications engineering [TJ]
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