How Boost Converters Work (DC-DC Step-Up) - Electronics Intermediate 1

[billysunerson]

It is SO hard to find videos that clearly explain the step by step function of a circuit. Thank you!

[igbandautala]

For the first time I actually understand this. Great explanation.

[utsavshah]

"As it says video gives much more clarity than thousand words". This is the best video on YouTube for boost converter. Thanks.

[cortez]

Thanks a lot, I'm studying mechanical engineering and whenever I come across electronics I tend to understand very little, but I've fully understood this circuit thanks to your video. Will definitely subscribe and try to learn more about electronics :)

[epiendless]

Simple way to make one of these - 4093 Schmitt NAND gate. Make the first gate into a Schmitt RC oscillator. Use other 3 NAND gates as inverters connected in parallel, to buffer the oscillator into the MOSFET. Use an NPN transisor to pull one input of the NAND oscillator low, stopping the oscillator when the transistor is on. (Because of the inverters between the oscillator and the MOSFET, the MOSFET will stop OFF - very important). Tap off a small proportion of the output voltage using a resistive divider and use this to turn the NPN on when the output reaches the desired voltage. Use high value resistors to avoid loading the output.


I first saw that circuit as a TENS machine. Since used it very successfully as an LCD backlight driver.
Make sure the diode is a fast switching diode or schottky rectifier. Ordinary rectifiers line 1N4001 are too slow to turn off, and drain the output capacitor when the MOSFET turns on. Even when just breadboarding, I found a slow rectifier is rubbish.

[liminal-mg]

Very clearly explained - which is a real skill when dealing with complex topics such as these - thanks!

[thejohnny]

This is the most helpful description of a boost converter I've seen.

[davebutler]

Well explained.
One thing to help remember inductor behaviour is they attempt to keep the current going in the same direction, when they "collapse".

[coolbionicle]

Holy shit! A boost converter is the same as a ram pump!

[teachertechnology]

One of the best explications I have ever seen. Period.

[bascelik]

awesome buddy! I am preparing an exam and had a lot of trouble understanding this, now it is easy! well done!

[shahedulislam]

This intermediate series is really useful, thanks and I hope you continue to make them.

[russelibrahim]

This is cool. I knew what a boost converter is but I never realized how easy it is to build one

[DrakkarCalethiel]

EveryCircuit? I love that program. Dead simple but actually very powerful for beginners to learn how to draw circuits, design them and simulate them. On a tablet ideal for mobile tinkering.

[JackJackie-xkpl]

You are always just showing us how they work we also need to know how to design them

[deankay]

Thank you having clear voice and reasonable speeds of explanation. I would think some call this a "Buck to Buck" convertor. I understand automotive electrical systems and a few components plus using a lab scope. As a dealer tech since the mid 70's, I am trying hard to make a simple HVAC actuator control circuit. It is a low current dc motor, plastic gear reduction to drive a door to direct air into or around the heater core. The dash controls are mechanical but I am handy in fabrication. It could be "Heat" but with a linear potentiometer. Since actuators can be simple, this on is as it drives a pot for feed back. Move the dash lever, the motor turns on and moves to new location and stops. Yet, it has to change directions. I was thinking of an OP Amp, the 2 pots as voltage dividers for input. To make it easy, use mosfets in "H" bridge. Just working out on paper, then test and build. Actuator are $10 and I can make a 5 Vdc circuit for mosfet control.
Like you, I am into motorcycles but started on lawnmowers to make the $1 it paid in 67 and better than mower with wheel driven blades. Self taught as Yamahas where metric and metric tools fit standards, but not the other way. In the county, word of mouth found Datsuns, Opels and everything else coming to me to fix. It didn't hurt growing 7" to 6'3" at 11 and had tools w/unused machine shed on the farm.
I just want to built this as I am updating a 67 C10 PU and auto trans where manual is. Plus updating the engine on the cheap. This way I can have my vehicle to drive to Dr. or store. My wife has a 96 Corolla w/160k so need backup vehicle she can drive and operate. Just simple but reliable. Sad to say she had medical issues and I will have my 4th fusion at L3-L2 and hopes it the last. I don't have a Facebook or cell phone, but get by. If you have an idea for a new video using two op amps to drive H bridge, I will be watching your channel. Thanks again for very good just job on the videos. Subscribed! Omaha.

[aasthapandey]

the explaination is so smooth & simple, really worth it watching

[iPsychlops]

This is such an easy to follow explanation. Thanks!

[freeenergytransformer]

A boost converter is a DC-DC step-up converter.
It takes in a low voltage and outputs a higher voltage.
The boost converter is a popular choice for powering microcontrollers, sensors, and other electronics.

There are many different types of boost converters on the market. Some are simple, while others have more features. When choosing a boost converter, you'll need to consider the voltage requirements of your project, as well as the size and weight of the converter.

Boost converters can be used to power projects that require 5 volts or more. They're also a good choice for systems that need higher voltages, such as 12 volts or 24 volts.

[ducpham]

Can you explain me why When the switch if off, the polarity of the inductor changes, and the circuit uses inductor as a source instead of the 9v voltage source ?