| View Larger Image | Power Supplies for LED Driving | Paperbackby Steve Winder (Author)
| List Price: | $59.95 | | Price: | $53.95 | | You Save: | $6.00 (10%) | | | Available: | Usually ships in 24 hours |
| | Binding: | Paperback | | Publisher: | Newnes | | Page Count: | 248 Pages | | Publication Date: | April 01, 2008 | | Sales Rank: | 261,361st |
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EDITORIAL REVIEWS |
Product Description
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. |
CUSTOMER REVIEWS (Average Customer Rating: 4.5 based on 2 reviews)
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Excellent starting point and comprehensive overview by stefan grunspan (paradise)  5 Stars
October 28, 2009
If you've got a background in designing power supplies you can probably get by with reading a few dozen application notes to figure out the subtleties of LED drivers. If you're not a power supply designer but familiar with electronics you can read a few hundred application notes or just buy this book.
This book assumes very little but doesn't spend a lot of time on the basics. In other words, if you took an electronics class in college 5 years ago did something similar years ago, the overview will be enough spark a memory, but you won't find an explanation of how a transformer, voltage divider, etc. works. There's an introduction on LEDs, their history, basic science and operation and their current application. From there the author details each type of power supply used for LED driving, buck, boost, boost-buck, sepic, flyback, etc. In each case the author points out potential problems and offers some real world advice on designs, technique, safety margins, etc. he concludes with some chapters on safety and regulations. I think another reviewer commented on the fact that all of the examples featured chips from one company, I think one the author has some relationship with. This is true, but I didn't find this problematic in any way. The bulk of the book is pretty general in its scope and as such can be applied to any LED driver IC. And the examples with specific chips were, well pretty general as well. If you understand how boost drivers work, you'll be able to design around national, maxim, etc. chips.
Two things worth noting. Early on the author suggests not using high powered LEDs to test drivers because, a) high powered LEDs are an expensive way to test drivers in the event of a failure and b) you'll go blind. As obvious as this seems now, I am pretty thankful I found this book before I went blind and broke. Second, the one thing I thought this book lacked, and I think this is due to when it was published 2007, was a detailed discussion on dimming. How you dim an LED affects all kinds of decisions made in the driver. I am not referring to issues of using existing TRIAC dimmers, or offline dimming etc. - that's a separate issue. I am referring to contrast ratio, the rise and fall slope of the on/off time, high side or low side switching, etc. I'm not sure this was widely known in 2006/2007 when this book was published but it is an important topic now.
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Worth a read for engineers working with LED drivers by S. Wettasinghe (Sydney Australia)  4 Stars
July 16, 2008
The Author Steve winder is a Field applications Engineer who works for Supertex Semiconductors has written the book to cover Supertex products well. I would have given it 5 starts if it was covering wide range of product brands. In spite of the somewhat biased view. I still think it is worth a read to any engineer who is working with LED drivers.
Here is the table of contents
1 Introduction
2 Characteristics of LED
3 Driving LEDs
4 Linear power supply
5 Buck based LED drivers
6 Boost Converters
7 Boost Buck Converter
8 Led drivers with power factor corrections
9 Fly-back converters
10 Essential of switching power supplies
11 Selecting components for LED driving
12 Magnetic materials for inductors and transformers
13 EMI and EMC issues
14 Thermal considerations
15 Safety issues
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