(Bild: Nikita Rublev - stock.adobe.com) This article explains the meaning of a switched-mode power supply and takes a closer look on its working priciples.
Basics of Switch Mode Power Supply
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Structure and appearance of switching mode power supplies
LM2674 5V Switch Mode Power Supply
Switch Mode Power Supply and Switching Regulators
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How Switch Mode Power Supplies Work, Block by Block
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Different Types of Switched Mode Power Supply (SMPS)