Power Supplies for LED Driving

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Newnes, Apr 8, 2011 - Technology & Engineering - 248 pages
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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, while costing the least. This book covers the design trade-offs involved in LED driving applications, from low-power to UB-LEDs and beyond.

* Practical, "hands-on" approach to power supply design for LED drivers
* Detailed examples of what works and why, throughout the design process
* Commentary on how the calculated component value compares with the actual value used, including a description of why the choice was made
 

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Contents

Introduction
1
Characteristics of LEDs
7
Driving LEDs
17
Linear Power Supplies
33
BuckBased LED Drivers
39
Boost Converters
61
BoostBuck Converter
99
LED Drivers with Power Factor Correction
141
Selecting Components for LED Drivers
175
Magnetic Materials for Inductors and Transformers
195
EMI and EMC Issues
203
Thermal Considerations
217
Safety Issues
225
Bibliography
229
Index
231
Author Biography
233

FlyBack Converters
149
Essentials of Switching Power Supplies
161

Common terms and phrases

Popular passages

Page 229 - Montrose, Mark I., 2000. Printed Circuit Board Design Techniques for EMC Compliance, Second Edition, IEEE Press.

About the author (2011)

Steve Winder specializes in designing circuits for telecommunications applications, but has experience in a number of fields. As the current European Applications Engineer for Supertex Inc. Steve works alongside design engineers throughout Europe to design circuits using components made by Supertex, a U.S. based manufacturer of high voltage MOSFETs, CMOS integrated circuits and ASICs. Prior to joining Supertex, Steve was for many years a team leader for a group of analogue and digital design engineers at British Telecom's research and development laboratories, now known as Adastral Park, based near Ipswich, UK. Here, Steve applied his analytical skills to many technical areas but specialized in wideband analogue and digital transmission systems using copper pairs and optical fibre. In this role, Steve's strength was in radio frequency design, low-power design, low-noise design and systems engineering.

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