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.
Found your channel finally. I have watched a lot of your videos on element14. RUclips suggested this video to me. I thought “wait, deja vu ”. Then the description of you channel proves my guess. Great video!
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 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!
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.)
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.
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.
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.
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!
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?
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.
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!
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.
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...
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!
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 RUclips 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.
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.
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.
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.
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.
Nice video, thanks. I would wery much like you to make a follow up on this subject. I have used a lot of hours watching videos and reading about boost converters, and one thing i dont seem to get is. 1. You short the inductor to ground, in shorter or longer time periods (PWM), and despite doing so, you still get high efficiency something like 80-90%, what about the current that runs through the inductor to ground while charging up the inductor ? 2. How long is the maximum on time for the switch, at some given inductor value, i meen you are tecnically shorting your power rail to ground. 2. if i use a MCU to generate the PWM, and find myself a suitable FET, how large should the inductor be, at what switching frequency and duty. say i need to generate 12V from a 5 volt source at lets say 1A amd my PWM is 20KHz, could you maby try going through an example, using a MCU as controler, to better understand what is going on inside such a dedicated boost chip ? There is a lot of videos on the subject on youtube, but i have not been able to find one single one, where someone uses a MCU as the controller, and explain whithout going in to serious maths, how to choose the right inductor size, please be the first. Greatings from Denmark. Morten
+Morten Rolsing Answer to #1 and #2 are related: when current initially flows into an inductor, it has a very high resistance. As current continues to flow and the magnetic field saturates the core material, the resistance of the coil drops. So the maximum "on time" depends how long it takes the magnetic field to build. To determine that you need to consider frequency, inductance, core losses, and the inductor's saturation curve. #3 I probably won't cover a discrete design on AddOhms. Designing a discrete switcher from scratch is incredibly detailed, as you have found. My idea for a "design tutorial" would be using an buck (or boost) controller chip and perhaps showing what happens with the wrong inductor/capacitors values.
+James Lewis Thanks for the answer, such a toturial would be much apreciated. I would prefer if you would use the boost converter in such a toturial, i find them the hardest to understand. Maby you could do a inductor saturation toturial also some time, that would also be extremely usefull. Thanks again, keep up the good work. Morten
I would really like to build my own buck boost converter from 150 to 600 watts. A couple of tem at least. But I am a new fish so I understand these basic concepts but I have not done a deep dive yet.
basically during ON start - circuit gradually increases voltage to max level instead of immediate switching ON. It is RL/RC - not sure if transistor needed. Like a relay but at the end it is just a full connection
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?
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.
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?
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
Perhaps what bother me the most about this type of power supply is that they become noisy as you reach the max output... any chances you would be willing to show how to increase their max output with out increasing in noise and temperature>???
awesome reply, you are totally correct!!! I have been using abut 2 or 3 power supplies in line, in order to overcome this particular problem.. since my power consumption is around 4 amps... but those cheap Ebay Chinese modules are not meant to provide the "Rated Power" without lost of noise & temperature!! I was just wondering if it would be possible to double only the chip, inductor, and cap to arrive to a better way to solve this particular problem....(I try to sing in your website but no matter what I do the confirmation mail never arrive.. )
In a switching supply, it is rarely as simple as “double the size of a component.” The inductor needs to get bigger to support more current, but it may be more than 2X for twice the current. Also, the switch used needs to support being able to charge that larger inductor.
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.
Wow!!! this is a GREAT video. Long enough to understand, Short enough to be interesting!!
Found your channel finally. I have watched a lot of your videos on element14. RUclips suggested this video to me. I thought “wait, deja vu ”. Then the description of you channel proves my guess.
Great video!
This guy is so good at teaching, anybody with just a little bit of knowledge will understand this!
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!
would love to see some more information about designing a switching regulator
I'm subscribing. The way of presentation, explanation, is what I've been looking for in my entire life.
Thanks for the great summary on buck, boost, and buck-boost converters! I'd personally love it if you made a design video!
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!
Thanks for all your help sir and for taking the time out of your day to help us along.
It's much appreciated.
Thanks!
I for one are very interested on how to design these regulators.
U are a very good teacher but please smile a little bit I do appreciate your videos
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.)
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.
Easier approach but makes deepest understanding . Nice.
Thanks.
Yes please, explore more of all 3 types. Great video as always.
Really love your videos. Very well explained and in a very simple way. Thank you very much for your dedication.
Great and simply clarified, thank you very much👍
Excellent, great piece work and well explained.
Yes! Please create a tutorial on designing a switching regulator!
would love it if you made a video on how to design the circuit
Best smps concept video. You made my doubts clear. Thank you sir.
direct, to the point, awesome video! thanks
Liked, looking forward to the buck/boost video, hope it is builder-friendly, maybe feature a couple of the simpler ICs.
I just loved your visuals 🔥🔥 fantastic job 🙌
Thank you for contributing to my education.
You are the best on the web. Thanks
Nice and clean explanation, thank you.
Hello I'm from Indonesia, it's helpfull, Thank You :)
great brief explanation
When there was the explosion I completely lost it 🤣
Thanks for the helpful video! I would be interested in seeing the design of an LED array using a switching regulator.
the explanation Technique is a wonderful
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.
BTW, I really love your videos!
Thanks for such good and intuitive explanations!
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.
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)
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
Would be great to see some more information about designing the switching regulator
very good lesson
Excellent video!
"Thank You", thank you very much. I'd to learn and see, how-to design and build a 9VDC switching regulator for breadboard projects 😄😎😄
Awesome explanations .Thanks a lot .
Just what I wanted! Thank you sir!
Good video!! And well explained
Really well done! Keep up the great work!
Good as a general overview on SMPS. A LOT of caveats to watch out for when designing or trying to hack an existing module.
hey learning how to design one sounds great.
Fantastic ....Thank you very much!
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.
thanks, id love to se a video where you design a boost converter for ex 3.7 to 5v
sir,
Request you to kindly make more videos on switching regulators...
excellent video.
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.
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?
Awesome video, thanks
amazing bro
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.
Very good.informative video
thanks, i am waiting for the battery maximum power extraction video.
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!
good explanation.Thanks
Great video. Much appreciated.
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
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.
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.
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 RUclips 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.
Your videos are awesome
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 :)
well explained video 👍
I'm feeling daring...how would I design the PWM controller for a buck converter?
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 >.
I have forgot to say...of course I gave you a big thumb up and I am subscribed on your channel! :-) ;-)
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.
Thank you very much!
yes for detail please， i will come to watch
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.
InTeReStiNg :) Thank you.
Great video!! Thanks!!
Nice video, thanks.
I would wery much like you to make a follow up on this subject.
I have used a lot of hours watching videos and reading about boost converters, and one thing i dont seem to get is.
1. You short the inductor to ground, in shorter or longer time periods (PWM), and despite doing so, you still get high efficiency something like 80-90%, what about the current that runs through the inductor to ground while charging up the inductor ?
2. How long is the maximum on time for the switch, at some given inductor value, i meen you are tecnically shorting your power rail to ground.
2. if i use a MCU to generate the PWM, and find myself a suitable FET, how large should the inductor be, at what switching frequency and duty. say i need to generate 12V from a 5 volt source at lets say 1A amd my PWM is 20KHz, could you maby try going through an example, using a MCU as controler, to better understand what is going on inside such a dedicated boost chip ?
There is a lot of videos on the subject on youtube, but i have not been able to find one single one, where someone uses a MCU as the controller, and explain whithout going in to serious maths, how to choose the right inductor size, please be the first.
Greatings from Denmark.
Morten
+Morten Rolsing Answer to #1 and #2 are related: when current initially flows into an inductor, it has a very high resistance. As current continues to flow and the magnetic field saturates the core material, the resistance of the coil drops. So the maximum "on time" depends how long it takes the magnetic field to build. To determine that you need to consider frequency, inductance, core losses, and the inductor's saturation curve.
#3 I probably won't cover a discrete design on AddOhms. Designing a discrete switcher from scratch is incredibly detailed, as you have found. My idea for a "design tutorial" would be using an buck (or boost) controller chip and perhaps showing what happens with the wrong inductor/capacitors values.
+James Lewis
Thanks for the answer, such a toturial would be much apreciated.
I would prefer if you would use the boost converter in such a toturial, i find them the hardest to understand.
Maby you could do a inductor saturation toturial also some time, that would also be extremely usefull.
Thanks again, keep up the good work.
Morten
I want to output 1A 5v from a UPS Battery Which is 12v-7.2Ah. which voltage regulator I should use
Nice video
I would really like to build my own buck boost converter from 150 to 600 watts. A couple of tem at least. But I am a new fish so I understand these basic concepts but I have not done a deep dive yet.
Can you also discuss soft start AC switch? There must be simple way to design it but they are expensive.
I’ve never built a soft start or looked into how they work.
basically during ON start - circuit gradually increases voltage to max level instead of immediate switching ON.
It is RL/RC - not sure if transistor needed. Like a relay but at the end it is just a full connection
It’s not a relay and that’s what makes it complicated (and expensive)
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.
Good video
Thanks man
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?
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.
Worthy one !
Wonderful.
Thanks
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
excellent video :)
When you said "I should have used a shunt resistor", did you mean series resistor?
Yes. That was part of the joke.
Thanks !
How to calculate the indcutor and capacitor value?
Perhaps what bother me the most about this type of power supply is that they become noisy as you reach the max output... any chances you would be willing to show how to increase their max output with out increasing in noise and temperature>???
I gave an answer here: discuss.addohms.com/t/reducing-noise-at-max-output/989. If you don't want to sign up for the forum, you can reply on RUclips.
awesome reply, you are totally correct!!! I have been using abut 2 or 3 power supplies in line, in order to overcome this particular problem.. since my power consumption is around 4 amps... but those cheap Ebay Chinese modules are not meant to provide the "Rated Power" without lost of noise & temperature!! I was just wondering if it would be possible to double only the chip, inductor, and cap to arrive to a better way to solve this particular problem....(I try to sing in your website but no matter what I do the confirmation mail never arrive.. )
In a switching supply, it is rarely as simple as “double the size of a component.” The inductor needs to get bigger to support more current, but it may be more than 2X for twice the current. Also, the switch used needs to support being able to charge that larger inductor.