Understanding Switching Mode Power Supplies

This video provides a short technical introduction to switching mode power supplies and explains how they are used to convert alternating current into direct current.
Learn more about power electronics testing: rsna.us/6053iCQpH
Timeline:
00:00 Introduction
00:15 Suggested viewing
00:34 Review of linear power supply
01:07 Addressing the limitations of linear power supplies
02:09 About switching mode power supplies (SMPS)
03:05 Basic AC-DC SMPS block diagram
04:00 AC rectifier and filter
04:26 Switcher (chopper)
05:28 Transformer
06:08 Pulsed DC rectified and filter
06:38 Aside: DC-DC conversion
07:43 Voltage regulator / controller
08:42 Advantages and disadvantages of SMPS
09:50 Summary

[@tav9755]

This „understanding“ series is really well made. Good explanation and a pro narrator.

[@pauldenisowski]

Thank you! There are many, many more videos coming!

[@spelunkerd]

I really like the logical and simple way you explain complex topics.

[@pauldenisowski]

Thank you! I like to tell people that I'm making the videos I wish I had when I started out working as an engineer :)

[@gerdschneider6098]

Very well explained!

[@pauldenisowski]

Thank you! Really appreciate it!

[@transformateur9969]

Great explanation! Could you explain how the input filter and power factor correction work too?

[@davidluther3955]

A LOT INFORMATION HERE TO THINK ABOUT

[@GiC7]

Thanks

[@pauldenisowski]

Thanks!

[@mhnoni]

But why laptop power supply have no transformer component? isn't it a Switching Mode Power Supply? how does it lower down the voltage? or the transformer is there but just small one?

[@pauldenisowski]

There is a transformer in AC/DC laptop power supplies - it's typically not exactly "small" compared to the size of the entire supply, but it is much smaller than one that would be needed in a linear power supply (I'm not aware of any modern laptop chargers that are not SMPS). If you search TH-cam you can find some teardown videos that show the transformer in a laptop power supply. Hope that helps!

[@mhnoni]

@@pauldenisowskiI see, thanks for the confirmation, I thought it had no transformer since the size is very small compared to the PC PSU.