Power supplies for LED driving / / Steve Winder

• Record Nr.: UNINA9911006623903321
• Autore: Winder Steve
• Pubbl/distr/stampa: Amsterdam ; ; Boston, : Elsevier/Newnes, c2008
• ISBN: 9786611279738; 9781281279736; 1281279730; 9780080558578; 0080558577
• Edizione: [1st edition]
• Descrizione fisica: 1 online resource (245 p.)
• Disciplina: 621.3815/22 22; 621.381522
• Soggetti: Light emitting diodes - Power supply; Electric power supplies to apparatus
• Lingua di pubblicazione: Inglese
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Note generali: Description based upon print version of record.
• Nota di bibliografia: Includes bibliographical references (p. [229]) and index.
• Nota di contenuto: Front Cover; Power Supplies for LED Driving; Copyright page; Table of Contents; Preface; Chapter 1: Introduction; 1.1 Objectives and General Approach; 1.2 Description of Contents; Chapter 2: Characteristics of LEDs; 2.1 Applications for LEDs; 2.2 Light Measure; 2.3 Equivalent Circuit to an LED; 2.4 Voltage Drop Versus Color and Current; 2.5 Common Mistakes; Chapter 3: Driving LEDs; 3.1 Voltage Source; 3.2 Current Source; 3.3 Testing LED Drivers; 3.4 Common Mistakes; 3.5 Conclusions; Chapter 4: Linear Power Supplies; 4.1 Introduction; 4.2 Advantages and Disadvantages; 4.3 Limitations; 4.4 Common Errors in Designing Linear LED DriversChapter 5: Buck-Based LED Drivers; 5.1 An Example Buck Converter Control IC; 5.2 Buck Circuits for DC Applications; 5.3 Buck Circuits for AC Input; 5.4 Buck Circuits Powered by an AC Phase Dimmer; 5.5 Common Errors in AC Input Buck Circuits; 5.6 Double Buck; 5.7 Hysteretic Buck; Chapter 6: Boost Converters; 6.1 Boost Converter Operating Modes; 6.2 HV9912 Boost Controller; 6.3 Design of a Continuous Conduction Mode Boost LED Driver; 6.4 Design of a Discontinuous Conduction Mode Boost LED Driver; 6.5 Common Mistakes; 6.6 Conclusions; Chapter 7: Boost-Buck Converter7.1 The Cuk Converter; 7.2 SEPIC Buck-Boost Converters; 7.3 Buck-Boost Topology; 7.4 Common Mistakes in Boost-Buck Circuits; 7.5 Conclusions; Chapter 8: LED Drivers with Power Factor Correction; 8.1 Power Factor Correction; 8.2 Bi-Bred; 8.3 Buck-Boost-Buck (BBB); 8.4 Common Mistakes with PFC Circuits; 8.5 Conclusions; Chapter 9: Fly-Back Converters; 9.1 Two Winding Fly-Back; 9.2 Three Winding Fly-Back; 9.3 Single Winding Fly-Back (Buck-Boost); Chapter 10: Essentials of Switching Power Supplies; 10.1 Linear Regulators; 10.2 Switching Regulators; Chapter 11: Selecting Components for LED Drivers11.1 Discrete Semiconductors; 11.2 Passive Components; 11.3 The Printed Circuit Board (PCB); 11.4 Operational Amplifiers and Comparators; Chapter 12: Magnetic Materials for Inductors and Transformers; 12.1 Ferrite Cores; 12.2 Iron Dust Cores; 12.3 Special Cores; 12.4 Core Shapes and Sizes; 12.5 Magnetic Saturation; 12.6 Copper Losses; Chapter 13: EMI and EMC Issues; 13.1 EMI Standards; 13.2 Good EMI Design Techniques; 13.3 EMC Standards; 13.4 EMC Practices; Chapter 14: Thermal Considerations; 14.1 Efficiency and Power Loss; 14.2 Calculating Temperature14.3 Handling Heat - Cooling Techniques; Chapter 15: Safety Issues; 15.1 AC Mains Isolation; 15.2 Circuit Breakers; 15.3 Creepage Distance; 15.4 Capacitor Ratings; 15.5 Low Voltage Operation; Bibliography; Index; Author Biography
• Sommario/riassunto: Light-emitting diodes are being widely used due to their efficient use of power. The applications for power LEDs include traffic lights, street lamps, automotive lighting, architectural lights, household light replacements, signage lighting (replacing neon strip lights and fluorescent tubes), and many more. Powering (driving) these LED's is not always simple. Linear driving is inefficient and generates far too much heat. With a switching supply, the main issues are EMI and efficiency, and of course cost. The problem is to get a design that meets legal requirements and is efficient,