How SMPS works | What Components We Need? Switched Mode Power Supply

Comments · 662

• EL

  @ELECTRONOOBS · 5 years ago · pinned

  Sign up at <a href="http://electronoobs.io/">ELECTRONOOBS.io</a>: <a href="https://electronoobs.io/">https://electronoobs.io/ </a><br>Follow me on FACEBOOK for more: <a href="https://www.facebook.com/Electronoobs">https://www.facebook.com/Electronoobs </a><br>help me on Patreon: <a href="https://www.patreon.com/ELECTRONOOBS">https://www.patreon.com/ELECTRONOOBS</a>

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• SA

  @saikittang7450 · 5 years ago

  I honestly can’t imagine how much time and effort must have gone into making these videos man. &nbsp;Appreciate it!

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• BA

  @bashaaksema94 · 5 years ago

  The EMC filter is also really important to make sure the power supply doesnt make interference on the line

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• BO

  @Boffin2002 · 5 years ago

  I&apos;ve been in the business for quite a while and can honestly say this is a very well presented explanation. Not too technical but accurate enough and to the point. I&apos;d have no hesitation recommending your material to anyone that wanted to learn. Well done

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• ZS

  @zsigmondsinventions5201 · 5 years ago

  I am an electrical engineering student, and learn more from your videos than from university :((

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• RO

  @RoadRunnerMeep · 5 years ago

  Probably one of the most indepth videos I&apos;ve seen for SMPS that simplifies it :)

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• CE

  @cecilandrews1875 · 5 years ago

  This has to be the best description of power supplies design I have ever seen you have a new follower

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• JE

  @jeremiahchamberlin4499 · 2 years ago

  This is my third video today on switch mode power supplies. It was most informative. As an English (American) speaker, I had no problem with the verbal instruction, I understood you very well. As a student, I deeply appreciated the waveform transformations across sections. Of the power supply. A lot of repair videos assume the viewer is familiar with how a SMPS works; I was not (and wondering for years): you explained it very well. You focused on the main components without getting distracted by how individual capacitors, zener diodes, and resistors could affect performance. If I were to repair an item, I would need that information, but BEFORE I need to make the repair, I need the information you present. Thank you very much.

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• DA

  @dawsonrichards6363 · 5 years ago

  This channel is amazing and underrated. Somehow you manage to read my mind and teach me exactly the things I need and want to know. Please keep up the amazing content!

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• GO

  @gonzalomeabe5256 · 5 years ago (edited)

  Great video!<br>Just a little thing I want to mention, at <a href="https://www.youtube.com/watch?v=cK5WLMFSGnw&amp;t=934">15:34</a>. The control circuit is on the low voltage side, but the power transistors are still on the high voltage side, so you need a way to controll them withouth loosing your insulation. That&apos;s the purpose of that smaller transformer. I&apos;m pretty sure that it is used to control the power mosfets from the low voltage side. I asume that the main transformer have 4 pins on the left, two pins for the main HV winding, and two for an auxiliary winding, used to power up the control circuitry (and in some other desings, an auxiliary winding is used as a voltage feedback instead of using an optocoupler, as its voltage should be more or less, proportional to the output winding voltage). <br>If you watch close, near the small transformer, there are two small transistors used to drive the primary side, and on the other side, there is a bunch of capacitors, resistors and diodes used to drive the gates of the power mosfets; those are needed to reduce the time they take to turn off, and therefore, to reduce the power loss. And two diodes to form a snubber network, to protect the transistors against reverse high voltage spikes, due to commutation.<br>You can tell where is the division between high voltage and low voltage side, by looking at the bigger gap that separates the copper traces from one side to the other.

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• AM

  @ameristanbouli5063 · 5 years ago

  i was waiting for someone to explain why high frequency transformers are smaller but can handle the same power as the low fequency one with iron core thank you &nbsp;💙💙

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• YO

  @yopdiesel80 · 5 years ago

  Thank you so much for this video! Please don&apos;t stop creating such content, humanity needs it.

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