دانلود رایگان کتاب (Power Sources and Supplies World Class Designs (Marty Brown
کتاب طراحی سطح استاندارد تغذیه ها و مبدلهای قدرت (Marty Brown)
Power Sources and Supplies World Class Designs
Marty Brown
Preface
This book is an assemblage of four books from different authors on topics from linear and switching power supply design. The book covers a wide range of different aspects of power supply design with differing perspectives from these authors; all this combines to provide a more rounded view of the power fi eld.
There are many different stories as to how the designers in the fi eld came to be “ power supply engineers.” For me it was quite by accident. I had been an engineer for 5 years, using nothing more than 780X linear regulators. I was working on an avionics product designing the digital sections. I went to my manager when I had fi nished and said, “ We need to fl y this product, and we cannot take these bench supplies along with us. We need some power supplies designed. ”
He responded, “ I was just waiting to see who fi nished fi rst. ” One year and four different versions later, the unit fl ew. And that was the start of my involvement in switching power supplies. In 1974, there were no PWM controller ICs, so by providing positive feedback around a linear regulator or by using a 556, one could generate the needed function. Discrete bipolar transistors and fast-recovery diodes were the only power semiconductor devices of the day.
The technology has come a long way since then. Semiconductor suppliers are providing virtually “ plug and play ” solutions such as National Semiconductor ’ s Simple Switcher™. The added help of the many online design and simulation tools makes the design task seemingly quick and painless. Other suppliers too, such as the magnetic component suppliers, have made it easier than ever to produce a switching power supply design. They produce many families of standard shapes and values of inductors and transformers.
However, once you go beyond the simple printed circuit board level switching power supply, the online tools quickly lose their usefulness. The majority of graduating engineers today are in the digital hardware and software fi elds, where only their basic electronics courses involved hysical electronics. So when a power supply needs to be designed, it becomes a matter of who can run the fastest! Of course, the job usually falls to the most junior engineer and it then becomes his or her next assignment.
The power supply design then usually follows that engineer throughout their employment with that company because of the “ millstone effect.” For me, this turned out to be fortunate. I had always been intrigued by the unknown and loved the fi eld ’ s curious combination of RF, digital, analog and power. My reward is in realizing that I intuitively understand an area that few engineers do, and my power supply designs are in many of the products in use today.
The contributing authors of this book are very respected engineers coming from very different experiential backgrounds. Their differing perspectives should provide a good appreciation of the power supply fi eld. So, good learning and good designs.
Marty Brown
September 2007
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 Power Sources and Supplies World Class Designs Marty Brown Preface This book is an assemblage of four books from different authors on topics from linear and switching power supply design. The book covers a wide range of different aspects of power […]){kind=link}