دانلود رایگان کتاب  (Switch-Mode Power Supply Simulation Spice (Steven M. Sandler

دانلود رایگان کتاب (Switch-Mode Power Supply Simulation Spice (Steven M. Sandler

کتاب شبیه سازی با Spice منبع تغذیه سوئیچ مد (Steven M. Sandler)

Switch-Mode Power Supply Simulation Spice

Steven M. Sandler

Preface

 

The predecessor volume of this book was published in 1996. In the years since then, some things have changed and some have not. Two of the things that have not changed are the desire for better models and faster simulations. I performed the original simulations on my “hyperfast” 133-MHz computer! At the time, I thought if I could just get a faster computer, all of our SPICE problems would be history, right? Today I am simulating on a computer that has a 2.6-GHz processor with 512 MB of RAM, and I would still say that simulations run too slow.
The computer technology has evolved, but so have the models. In 1996 we were performing simulations on 100-kHz power converters, whereas today I routinely see 1- and 2-MHz power converters. Another thing that has not changed is that I still routinely receive comments such as “We don’t have time to simulate” or “Simulation results don’t provide accurate answers.”
There have also been many changes since the earlier version of this book. Design cycle times have been reduced, while performance requirements have generally become more difficult. The monolithic devices of today incorporate much more technology with many more functions and features than the devices of 1996. It is for these reasons that I would argue that we must use SPICE or some other simulation tool to the fullest extent possible.
Another change since the predecessor volume was published is that many component manufacturers have jumped on the SPICE bandwagon. Many semiconductor manufacturers publish SPICE models of their devices, as do capacitor manufacturers and inductor manufacturers. Many integrated circuit manufacturers publish SPICE models and some even offer Internet-based simulation tools with preset templates for their devices. Device models have generally improved in accuracy, but beware: There are still plenty of poor models being published. In order to keep this book as useful as possible, several changes were made to the earlier version. I updated some of the example circuits to reflect the higher level of technology and added actual measurement results for many of the example circuits. This shows the correlation that is possible and hopefully proves once and for all that SPICE will provide very accurate results if you start with an accurate model.
The linear regulator chapter has been expanded. As simple and “low tech” as these devices appear to be, I still see many design issues involving these devices. Hopefully, this additional information will improve the understanding of how these devices operate and the issues that surround them. A chapter has been added on active power factor correction (PFC), because it has become a much more widely used technology.
I hope that you will find the updates useful and wish you happy simulating.
Steven M. Sandler

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