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After three long years of extensive work on this project, my new book entitled Transfer Functions of Switching Converters - Fast Analytical Techniques at Work with Small-Signal Analysis is available for purchase via the links given below.

The book starts with a smooth introduction to switching cells, going into the details of the first steps of linearization and small-signal modulation. You will then learn how the PWM switch model was derived and how to apply it to the basic structures operated in fixed switching frequency and various operating conditions like continuous and discontinuous modes in voltage- or current-mode control. The model is extended to other control schemes like quasi-resonance, constant on- and off-time converters, all with an associated small-signal version. The following chapters explore the founding structures like the buck, the boost and buck-boost cells, naturally covering their isolated versions like forward or flyback converters with many variations (push-pull, half- and full-bridge, phase-shift, interleave etc.). The last chapter deals with more complicated structures like Ćuk, Zeta, SEPIC and LLC.

The book represents an ideal companion for the young or seasoned engineer willing to study and stabilize her or his switching converter. Finally, BSEE, MSEE or Ph.D students will also find many useful descriptions and methods they can later apply during their studies or when facing their first industrial projects.
The book is printed in color and divided in five chapters with an appendix. The table of content is here.

Chapter 1: you will find a guided introduction to small-signal modeling, why you need it and how to apply it. Once the foundations are laid out, the chapter explores the basic switching cells and determines their basic transfer characteristics like conversion ratios for isolated and non-isolated structures. Operating schemes like voltage- and current-mode control are detailed as well as quasi-resonance operation. The PWM switch model is then introduced and its small-signal model derived for future use in the subsequent chapters.

Chapter 2: this entire chapter is dedicated to the buck converter whose four transfer functions are determined for voltage- and current-mode controlled switching cells operated in the two conduction modes, CCM and DCM. Quasi-resonance is not forgotten as well as more exotic modes like COT and FOT or even the tapped version. Isolated versions are described such as push-pull, half- and full-bridge versions as well as active-clamp.

Chapter 3: the boost converter increases the input voltage and can be found in many applications like dc-dc and power factor correction circuits. The chapter starts with the dc-dc version and determines all the needed transfer functions as in the buck converter case. After the description of the tapped version, the boost operated in quasi-resonant current-mode version is also detailed. Finally, power factor correctors working in boundary control mode are described and operated in application examples.

Chapter 4: the buck-boost converter is well known when operated in its isolated version, the flyback converter. In this chapter, you will enjoy determining the four transfer functions of the buck-boost converter and extend the analysis to the flyback version. The popular quasi-resonant version is not forgotten and described in the book. Finally, single-stage converters are also popular and part of the descriptions.

Chapter 5: this final section deals with more complex higher-order converters like the Ćuk, SEPIC, Zeta and LLC. The analysis gains in complexity and the simulation examples help verifying the results analytically obtained. An LLC transfer function is proposed for the VCO-based control while the more recent current-mode version is also explored

Appendix A: this appendix can be seen as a crash course to let you discover the fast analytical circuits techniques and acquire a basic set of skills to understand how I derived all these transfer functions. Mastering the tool will require more efforts but the companion books given in the reference should let you strengthen your knowledge for a complete and firm acquisition of the method.

As with the previous books, I maintained an errata file you can download here.

The book is available from different channels. Stairway Press is the editor and they ship worldwide. Check-out their page as the book is often sold at a better price than from on-line retailers!

Stairway Press    Amazon (US)  Amazon (Canada)  Amazon (Germany)  Amazon (France)  Amazon  (Japan)  Amazon (UK)

Eddie Aho on his YouTube channel Kiss Analog published a video describing the book content. Merci Eddie!

You can read a review of the book published in How2Power and written by Dennis Feucht.
Free SIMPLIS Simulation Files: when writing this book on transfer functions, I have extensively used SIMPLIS to confim the results obtained with Mathcad and SPICE were correct. The many hours spent in simulating transfer functions of various converters lead me to aggregate all the circuits in ready-to-simulate templates which, for most of them, can work on the free demonstration version Elements. From simple dc-dc cells to more complex isolated converters operated in current- or voltage-mode control and controlled in fixed frequency, phase shift, COT, FOT and so on, you will find in these files converters that are fully compensated with an automated macro for computing type 2 or 3 compensation parameters. The description PDF is here while a ZIP of all the converters is here.

Mathcad calculation files: I have used many sheets to verify my calculations and illustrate the book examples. I have gathered 42 files described here and made them available for a small fee for company/professional individuals (150 USD or 140 Euros) and students/hobbyist (60 USD or 50 Euros). The files work with Mathcad 15 and include auto-toggling CCM/DCM compensation sheets for flyback and forward converters operated in current-mode. I will transfer the compressed file via a specific link to your address. Please write me to proceed, thank you.

关于书籍(Transfer Functions of Switching Converters - Fast Analytical Techniques at Work with Small-Signal Analysis,中文版:开关变换器小信号建模-基于快速分析技术)中的Mathcad计算文件,我一共设计了书中的42个计算文档,并通过仿真进行了验证,同时提供给相关人员使用。对于工程师购买价格为120美元或100欧元,学生购买价格为60美元或50欧元,使用软件为Mathcad 15,包括各种控制模式,各种工作模式下的补偿计算表格,涵盖Buck: CM, VM, DCM/CCM, FOT, COT, QR Buck-derived: forward, tapped, push-pull, phase-shift full bridgeBoost: CM, VM, DCM/CCM, QR, PFC Buck-boost: CM, VM, DCM/CCM Buck-boost-derived: flyback, single-stage PFC SEPIC, Zeta, Cuk and LLC等各种电源变换器环路补偿计算表格 (图片)

如果您想购买Mathcad 15文件,请联系我的朋友Eric Wen-文天祥(eric.wen1984@qq.com),他将指导您进转账汇款和文件资料发送等相关事宜。

谢谢,我希望你会喜欢这本新书!

I wish these models and files help you in your daily work whether you are a student, a beginner or a seasoned designer. Let me know if you have suggestions or comments, I'll be happy to discuss with you all.