How Boost Converters (DC-DC Step-Up) Works

How Boost Converters (DC-DC Step-Up) Works

A look into how boost converters work in a very visual format. Try this circuit:

How Boost Converters (DC-DC Step-Up) Works – [Link]


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Mike is the founder and editor of, an electronics engineering community/news and project sharing platform. He studied Electronics and Physics and enjoys everything that has moving electrons and fun. His interests lying on solar cells, microcontrollers and switchmode power supplies. Feel free to reach him for feedback, random tips or just to say hello :-)

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Bob Kondner

Very good description. Very Good.

What I have noticed is very often a DIY project requires a strange voltage and a convert like this is required. But typically you also see multiple voltages required and sometimes negative voltages. I have found small flyback inverters very useful in these cases, setup, step down and isolation. All from a single inductor and switch.

You can purchase many “Pre-Wound” flyback inductors but they are also very easy to build. I have used many of the “EFD” sized cores and bobbins, very easy to build by hand. From tiny to large and they are fairly low profiles. With a basic primary defined for an input voltage range and frequency the output winding is simple. Simply use about 1 or 2 volts per turn depending of the magnetic design. (That design is not simple I use software. But once done alternate secondary windings are simple.

Example of multi-output flyback transformers can be found at

Bob K.

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