Switching Voltage Regulator (Buck, Boost) Introduction | AO #18
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- Опубліковано 1 сер 2024
- Switching regulators make use of the energy storage properties of capacitors and inductors.
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A transistor, or switch, controls the charging and discharging. This method makes for an efficient regulator, but can be difficult to design.
This is part 2 on Voltage Regulators. Part 1 (AddOhms #17) covered Linear Voltage Regulators. That video can be found here: • Linear Voltage Regulat...
Show Notes: addohms.com/ep18
Patreon: patreon.com/addohms
#voltage #regulator #smps - Наука та технологія
Fantastic videos. I think the best part of your videos is how easy you make things to understand. You move through the topics slowly and clearly which is super helpful. With that said, I'm currently an engineering student, and if you could find a way to combine this clarity and explanation with slightly more in-depth analysis and even a little design math... now that would be really fantastic.
Thanks for all your help sir and for taking the time out of your day to help us along.
It's much appreciated.
I'm subscribing. The way of presentation, explanation, is what I've been looking for in my entire life.
would love to see some more information about designing a switching regulator
I've should found this awesome channel earlier! You deserve get more subs because your tutorial is easy-understanding even for a beginner in electronical like me. I've watch the other tutorial video and get confused until finally I got lucky to watch your video. I'm waiting for the next episode especially the continue for switching powersupply. Thank you bald engineer! You're amazing!
Really love your videos. Very well explained and in a very simple way. Thank you very much for your dedication.
Thanks for the great summary on buck, boost, and buck-boost converters! I'd personally love it if you made a design video!
Yes please, explore more of all 3 types. Great video as always.
This guy is so good at teaching, anybody with just a little bit of knowledge will understand this!
Please make further videos regarding this topic. Your explanation is much better than others out there.
Really great job! I do love your tutorial. Your explanation are very clear and accurate. In 5 years of University (Master Degree in Electrical Engineering) I have never learned in this easy and efficient way. Italian University should be more pratical without skipping theorical concept. Thanks a lots!
Best smps concept video. You made my doubts clear. Thank you sir.
Excellent, great piece work and well explained.
Found your channel finally. I have watched a lot of your videos on element14. UA-cam suggested this video to me. I thought “wait, deja vu ”. Then the description of you channel proves my guess.
Great video!
Easier approach but makes deepest understanding . Nice.
Thanks.
BTW, I really love your videos!
Thanks for such good and intuitive explanations!
Thanks!
I for one are very interested on how to design these regulators.
Really well done! Keep up the great work!
Good video!! And well explained
Just what I wanted! Thank you sir!
Nice and clean explanation, thank you.
You are the best on the web. Thanks
direct, to the point, awesome video! thanks
You make some fantastic videos. It must take you ages for each one. After all, quality takes time.
Much appreciate it. I wouldn't mind seeing a video or 2 on designing SPMS, but in your style of video making.
Thanks for the feedback. And thanks for participating in today's live stream. I learned a lot. I think it's going to be a good way to cover topics in a more interactive manner.
Excellent video!
Great and simply clarified, thank you very much👍
Thank you for contributing to my education.
great brief explanation
U are a very good teacher but please smile a little bit I do appreciate your videos
Yes! Please create a tutorial on designing a switching regulator!
the explanation Technique is a wonderful
Another great video, thank you !
Awesome explanations .Thanks a lot .
Great video. Much appreciated.
Liked, looking forward to the buck/boost video, hope it is builder-friendly, maybe feature a couple of the simpler ICs.
excellent video.
would love it if you made a video on how to design the circuit
very good lesson
Your videos are awesome
do you have videos to explain how to use voltage mode control to control the buck converter? like the output increases or decreases, control loop change the switch frequency duty ratio to make output remain same voltage?
Awesome video, thanks
Thanks for the helpful video! I would be interested in seeing the design of an LED array using a switching regulator.
Fantastic ....Thank you very much!
Very good.informative video
good explanation.Thanks
well explained video 👍
Great video!! Thanks!!
"Thank You", thank you very much. I'd to learn and see, how-to design and build a 9VDC switching regulator for breadboard projects 😄😎😄
Hi James that explosion seen is a killer I pissed myself laughing.... I loved it!...great stuff!
+TCBperformance One of my non-electronics hobbies is learning how to make special effects. Eventually I'll composite one into a live action shot.
excellent video :)
Hello I'm from Indonesia, it's helpfull, Thank You :)
Thank you very much!
amazing bro
Good video
Thanks man
When there was the explosion I completely lost it 🤣
hey learning how to design one sounds great.
Nice video
Would be great to see some more information about designing the switching regulator
I just loved your visuals 🔥🔥 fantastic job 🙌
For the longest time, I could not completely understand the fundamentals of capacitors in DC. I watched a ton of videos that did not help much, but you just did it in very few words and a diagram.
Capacitors have many functions. In addition, most engineers don't fully understand how they work. This leads to a lot of bad information on them. (I used to be an application engineer for a capacitor company.)
InTeReStiNg :) Thank you.
Good Information but if you want a very high voltage one then the component you showed, in the end, will not do unless they have for bigger voltages and currents too?
Thank you, i would like to see a video on how to design these circuits, calculations and all that good stuff if possible :)
I'll probably never do a video on a discrete design. That is only done is in school. For the most part, I use TI's WEBENCH when I need to design a switcher. Not much math gets left over.
I want to output 1A 5v from a UPS Battery Which is 12v-7.2Ah. which voltage regulator I should use
I'm feeling daring...how would I design the PWM controller for a buck converter?
sir,
Request you to kindly make more videos on switching regulators...
thanks, i am waiting for the battery maximum power extraction video.
Wonderful.
Thanks !
I'd like to see on PCB techniques and recommendations like thickness, corners, angles, analog, digital , low and high frequencies layouts
Mr walid i thank u alot for your the amazing contemt in your channel.. I really learned alot from you... Thaaanks alot
thanks, id love to se a video where you design a boost converter for ex 3.7 to 5v
Please add a video about how to model this Nonlinear and time variant circuit of the switching regulator and how to design a good controller (PI or PID) for it!
Thanks
good video. but I would like one with more details. like how to choose the correct inductor (the minimum size that will do for your application)
Really like your presentation methods. Nice video but I think there is one very minor error. After the explosion graphic you mentioned you should have probably added a shunt resistor. Since shunt normally means "in parallel with", I think you meant to say a series resistor. Again great videos and really like your channel!
+jwrtiger Thanks, it was part of the joke. Glad someone got it.
Please upload more circuit design videos. Maybe break them up into multiple videos, as longer videos tends to have less views. Thank you guys so much anyways.
No "guys" here. I'm a one man show.
AddOhms Wow!! You're amazing man.
Firstly, thanks for these great videos. Well produced and packed with info!
I built a box that provides 5v reference voltage to automotive sensors and BNC connection for oscilloscope waveform of the return voltage.
I used a MP1584EN based buck converter thinking I wanted the efficiency over LM7805...
It's been suggested that the switching might be an issue in my waveform and that the linear 7805 would be "cleaner".
Do you think it is an issue in my application?
For a reference voltage I would use a linear regulator. The switching regulator is inherently noisy. I’ve seen designs where a switcher was combined with a linear. The switcher took care of the majority of the voltage for efficiency and the linear cleaned up the noise. I would also pick something more modern like a NCP1117 over a 7805.
How to calculate the indcutor and capacitor value?
Just discovered these videos about 15 minutes ago. After 40 years as a EE, I now understand a few things better than I did 15 minutes ago ! Thank you. I'll be back !
Question: I caught something at the end of this one that sounded like you were asking for a "shoat oat". Is there some barely-disguised Canuck in there ?
Nope. I grew up in the midwest. Which I think occasionally sounds Canadian so that might have been it. I actually learned to talk in the South, so my somewhat non-regional dialect has naturally developed as I changed my speech patterns over time.
I might have recorded that video shortly after a trip to Ontario, now that I think about it...
AddOhms
See ! See ! That must be it ! :-)
In any case, great job on the videos. I'll be following. Good luck.
can u help me to design oscillator for smps?
yes for detail please， i will come to watch
So, perhaps you should think of making a video about a adjustable switching regulator that work from a A/C mains supply? That would be real nice. and of course keep it as simple as possible?. I also suppose it would be a long project maybe more that one video.
I’m trying to step the voltage in an LED flashlight from 18VDC to 12VDC because I’m changing the light engine. After learning the hard way that resistors are too inefficient, I found your fabulous UA-cam channel.
Since my goals are high efficiency(i.e. low heat for a 9W light engine) and small form factor, would you say that a buck regulator is the way to go?
It's the easiest method. When you get around 10 Watts, then it makes sense to consider a constant current supply, instead of a constant voltage supply.
Awesome...
HI., I'm learning ,is it something similar to a switching power suplay works? I feel it is helping me to undertand other things. thank you very much, great vid.
Yes, it is
Good as a general overview on SMPS. A LOT of caveats to watch out for when designing or trying to hack an existing module.
I have forgot to say...of course I gave you a big thumb up and I am subscribed on your channel! :-) ;-)
"Thank You", thank you very much 😎 I am interested in designing a "boost converter" (9vdc to 12vdc) Let me know 😋 I look forward to hearing from you 😎 I'd like to learn how to design a switching regulator, with an NPN transistor 😎🤔😎
Good Video (y) . could you talk about lm 555 soon
whats difference between using an inductor and capacitor to using 2 capacitors or 2 inductors? Since both components store electricity, is it okay to do the setup to have 2 capacitors/inductors instead?
No, they do not both store "electricity." They both store energy. Inductors store energy in a magnetic field while capacitors store energy in an electric field. Because they work different, generally, you need both.
@@AddOhms im just kind of confused when to use a inductor or a capacitor >.
Can i use a microcontroller to generate the PWM signal?
Yes
Great way to save power but hopefully you can show a Buck Boost regulator without the TI chip and also show how you size the inductor. I would love to see how they did it vack in the day before they used The TI chip.
Sorry, I won't be making a discrete circuit. It's an academic exercise at this point that is best left for textbooks and classrooms.
HI, I am Jimi! Like to learn more about electronics. I have a 48volt battery and like to know how to do a step down using this method of yours, but I don't know where to start? I already bought a step down module twice but it only work for a month and that's it. I use that module to power my 19 volt Laptop and the module got heated up, The best part was, both of the module is without a heat sink! Please advice me if I can built a better ones for long run because I always used it outdoor. Please Thank you!
Sounds like it needs a heat sink.
If you can help me ...
I want to build a building* to charge the bike battery. 36V.
I bought 2 sources 24 V x 5 A.
Can you help me build a 42 V x 5 A building* ?
I saw many constructions on youtube, but with low current 1-2 A.
Thanks !
(*building* = Mounting = montage = assembly ...
I'm sorry, I don't know which word is correct? )
Would like to see you design and build a high amperage mppt charge controller for 48 volt output it'd be nice if you could add more mosfet and bigger inductor to your design to get as much amperage and wattage the person might need thank you very much for your videos
Every time when I connect emitter to a load the transistor is not working as a switch at all, but when I connect it to the drain everything seems ok, can you explain what to do?
I don’t understand what you are doing.
AddOhms simple topology, I use a transistor as a switch with a resistor on drain as you show, so far so good. When I change the topology by connecting the resistor to the emitter and the ground the transistor is switched on permanently, it behaves like a resistance. Now according to the above diagram the transistor emitter is connected to a sub circuit and it works as a perfect switch. So why every time when I try to do the same topology the transistor fails?
This video is not about how to use a transistor as a switch. It on creating a switch-mode power supply or "switching voltage regulator." If you need to use a transistor as a switch, I suggest watching my BJT and MOSFET videos.
Additionally, an emitter is associated with a BJT. A drain is associated with a MOSFET. It doesn't make sense how you are interchanging them.
NPN-BJTs and N-Channel MOSFETs are generally used as a "low-side switch." Which means the load goes between the +V and the BJT's Collector or the MOSFET's Drain. In general, you cannot use them as a HIGH side switch. You would need the PNP and P-Channel counterparts.
When you said "I should have used a shunt resistor", did you mean series resistor?
Yes. That was part of the joke.
Superb video and graphics, loved the way you animated the switched regulator operation. Could you do the same for the Boost Regulator, I don't get how it steps up the output voltage?
I probably won't do a video on it. It works by moving the inductor between the switch and source. (Whereas a buck it is between switch and load.) When the switch is closed, current flows through the inductor building its magnetic field. When the switch opens up, that charging path is lost. So now the inductor's magnetic field begins to collapse but the current is flowing to the load now. So you have the original source in series with the inductor. That creates a the higher voltage.
Again the filter capacitor helps to smooth out the voltage.
I get it now, thanks :)
What happen with the current ? Does it change proportionally with the voltage ?
The purpose of a voltage regulator is to keep a constant voltage as the current changes.