Every Component of a Switch Mode Power Supply Explained

In this video we go through every component of a modern switch mode power supply taking a look at their function. The first half of the video is dedicated to understanding how inductors are used in these circuits, as these are the beating hearts of power supplies. The second half of the video runs through each component, with increasing complexity, highlighting their position in both the schematic and the physical circuit before delving into their purpose.

What happens when:
0:00 Introduction
0:31 Evolution of switch mode power supplies (1980-2022)
1:47 Using inductors to store and release energy
3:40 Using inductors in a switch mode power supply
9:47 How inductors keep shrinking
11:35 Introduction to circuit analysis
12:00 Simplest possible SMPS
14:31 Output indicator LED
14:49 Additional output filtering
15:19 Output capacitor bleeder resistors
16:01 MOSFET source current shunt resistors
16:37 Input filtering
17:52 Input protection
19:54 Class-Y capacitors
20:35 Snubbers
21:47 Additional components (controller)
22:06 Conclusion
22:40 Outro

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