SWITCHING POWER SUPPLY DESIGN- A CONCISE PRACTICAL HANDBOOK

There are plenty of excellent books on power supply design. However, most of them are mainly academical, intended for teaching power electronics basics rather than providing complete, practical, easy-to-use equations for the circuit designers. In my more than 30-year carrier of SMPS design, in practice, I still often had to derive equations or search app notes. That’s how I came up with this concise SMPS design handbook, with the intention to provide in a single place all the essential information needed in the SMPS circuit design and analysis. Note it is not for learning power electronics for the beginners. It does not provide ready to go schematics or working examples either. This book is for those who know the electronics basics and need a quick practical reference. And you do not have to spend $50-$150 for it as you would for most textbooks. I hope this handbook will be as useful to the experienced designer as it will to the recent engineering grad and a student. If nevertheless you are looking for something to learn power electronics from scratch, see a list of my favorite power supply design books.

Here are the key topics covered:
• Main practically used isolated and non-isolated converter topologies, including active PFC;
• Power transformers and inductors design, analysis and calculation of the losses;
• Feedback control loop relationships;
• Miscellaneous design and analysis topics, such as estimation of MOSFET switching time and losses, calculation of output ripple, little known empirical equations for PCB, thermal, and magnetics analysis, and some practical tips.

The covered converter topologies are:
• Buck
• Fly-Buck™
• Boost
• Buck-boost (non-isolated flyback)
• SEPIC
• Isolated CCM flyback and DCM flyback
• Forward (including active clamp forward)
• Half-bridge
• Phase shifted full bridge with current doubler
• LLC
• CCM and DCM PFC boost

For each covered topology, I provided basic power train diagram, brief operation principal, basic waveforms, DC transfer function which takes into account power losses, voltage and current stresses in switches and rectifiers, magnetics equations, DC and AC components of the currents in all coils, and often overlooked rms currents in input and output capacitors. The calculations are done for worth case input voltage – something that is not always intuitive. For example, magnetizing inductance in a CCM flyback transformer has to be calculated at high line, while in DCM – at low line.

This handbook may speed up your design by saving time that would otherwise be spent on deriving equations or searching the literature, not to mention on re-spinning the board because of improperly selected magnetics or underrated components. See a review of the book on a reputable power electronic portal. You can download a free pdf chapter on flyback design to preview what's inside. If you find it useful, get the handbook here. You will have a choice between a printed version and Kindle Edition instant download (note, you don't need an actual Kindle device to read it- you can get there a free reader for your PC or a tablet). And if you have comments, suggestions, or you found an error, feel free to get in touch.