The Most Versatile Voltage Converter you never heard of! The (S)EPIC Converter

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In this video we will be having a closer look at the SEPIC voltage converter. You probably do not know it, but most small Buck Boost Converters are in fact SEPIC converters and for a good reason. I will show you how the SEPIC converter works, why it is "(S)EPIC", how you can modify it with a coupled inductor and how to make a DIY version. Let's get started!
Websites which were shown/mentioned in the video:
www.we-online.com/catalog/en/...
www.onsemi.com/pub/collateral...
www.ti.com/lit/an/slyt309/sly...
datasheetspdf.com/pdf/1096363...
datasheet.octopart.com/IPD088...
www.ti.com/lit/an/slyt411/sly...
www.all-electronics.de/wp-con...
www.digikey.de/en/articles/co...
www.ti.com/lit/ds/symlink/lm2...
Thanks to JLCPCB for sponsoring this video.
Visit jlcpcb.com to get professional PCBs for low prices.
0:00 SEPIC Converter?
1:54 Intro
2:29 How does it work?
5:20 Advantages of the SEPIC
6:05 Secret Coupled Inductor Hack?
9:21 Which SEPIC should you buy?
9:49 DIY SEPIC

Пікірлер: 380

@jostsalathe Жыл бұрын

I once tried prototyping a 1A buck LED driver that operates at around 1 MHz on a bread board. This ultimately drove me to begin my bachelor's degree in electrical engineering because I had no idea why the heck this just wouldn't work! Today I do know why... =D

@After_Tech_Industries Жыл бұрын

What wasn't working? I presume that it might have been the frequency; but I still want to know!

@jostsalathe Жыл бұрын

@@After_Tech_Industries To be honest, I never actually checked what was the problem. So "Today I have some ideas why" would have been more correct. I think the main reason was the high contact resistance in the bread board contacts along the high frequency, high current path. I think the losses there probably screwed up the feedback loop of the regulator. Another probable problem was that the MIC2301 driver chip that I used has an integrated high side switch and therefore its SOIC8 package has an ePad at the bottom for cooling. The SOIC adapter board I used didn't connect to that, of course. I think it then also overheated way more quickly than I expected.

@Teth47 Жыл бұрын

I was researching the different topologies to decide which one to design a low-voltage DC UPS around, and kept hearing that SEPIC is unstable against transient loads. It'd be interesting to see a video on how different topologies react to different types of loads.

@FreeTheUyghurs Жыл бұрын

Hey sounds like the situation I found myself in too! Surprised there isn't more commercial options around this given how often you'd think home users would just want an uninterrupted DC power source for their home network and other DC-powered electronics. My setup at the moment is a small server rack with a 15V DC PSU and a 12V Lead Acid battery (+ battery tender) with their ground connections tied. The output voltages are separated by diodes, thus creating a sort of "OR-ing" device. That gate's output is connected to a powerpole rigrunner so that I can split all my components to separate SEPIC converters to ease the change in load and to also not have a single point of failure. So far so good but then again I'm only running raspberry pi's, switches, and a router at the moment.

@kenmore01 Жыл бұрын

My experience is any SMPS will be unstable with transient loads. Go ahead and use one, but either have a huge cap, a battery or some other stable transient source to keep it from blowing out your electronics, or add a linear low-drop-out regulator at the end. It could even run saturated for low loss, but will prevent the voltage from going too high. That said, I suspect this SEPIC is worse than most SMPSs.

@profdc9501 Жыл бұрын

Many power supplies are based on a dual control loop topology, with an outer loop with conventional voltage control PWM and inner loop based on current mode control. This tends to protect the power supply against transient loads, especially short circuits and the like. Something like UC3843 and like series of chips may be more stable with a SEPIC converter. There is a sense resistor in series with the source of the switch to control switch currents, and there is an outer control loop that senses the voltage.

@Teth47 Жыл бұрын

@@chaosdragon6718 These are the reasons I moved away from SEPIC topology. I'm currently exploring flyback and push-pull, but stepping from designing buck converters to these more advanced topologies is pretty daunting.

@k4be. Жыл бұрын

There is also a four-switch buck-boost converter. Maybe look at BQ25713 for an example.

@rhodexa Жыл бұрын

What I like about this design is the "self destruct" protection capability: One of my biggest fears when using Buck Converters specifically is that, when the switching transistor fails, it will most likely go shortcircuit (which in buck converters means the full input voltage will get to the output) destroying the load with overvoltage. In contrast, this design will not only let the voltage go low but also may just blow a fuse or trigger an overcurrent protection. This feature/bug is also present in synchronous buck converters: if one transistor fails, as soon the second one turns on, the whole thing will just go shortcuit and trigger a protection system before the output voltage can get high enough to kill the load. But maybe I've too much of a green mind for a disposing culture society?

@oddjobbob8742 Жыл бұрын

I don’t think I understand more than a small bit of your KZfaqs but I watch and rewatch and even if I never understand I enjoy your drawings as much as anything. So clear. Your KZfaqs are art.

@vishnustechcorner3881 Жыл бұрын

Your videos are truly informative. It provides me with a lot of electronics knowledge as a hobbyist. Keep going. Also get well soon. You are great, scott :)

@greatscottlab Жыл бұрын

Thanks a ton

@vishnustechcorner3881 Жыл бұрын

@@greatscottlab I'm so glad that you replied to my comment 😊

@jclowe735 Жыл бұрын

@@greatscottlab what is the amps of this and could I safely use something like this with a 12 volts 20 watts solar panel?

@manoelbrasileiro1127 Жыл бұрын

Sure, they're very nice. But I think there's an error on the schematics presented for the DIY SEPIC (on 10:20): there's no connection to gnd for Q1 (and L2, C4, C5).

@ChristopherOYoung Жыл бұрын

Another great video.

@dianeattaway8733 Жыл бұрын

Your videos are delightfully concise with surprising details and always inspire greater things

@seanman6541 Жыл бұрын

SEPIC converters are great for applications where the output power is low. For higher power applications, there is the two-switch non-inverting buck-boost converter. It is simply a combination of a buck and a boost converter. When the input voltage is higher than the output, it holds the “boost” switch open and modulates the “buck” switch. When the input voltage is lower than the output, it holds the “buck” switch closed and modulates the “boost” switch.

@yeyuan6273 Жыл бұрын

it will be priblematic in between, .....

@mitsos306ify Жыл бұрын

Another great video! What I always love , is the use of paper, pen and markers!

@electroinduction1512 Жыл бұрын

Ah yes another great scott video! Awesome video,very informational about the sepic convertor!

@greatscottlab Жыл бұрын

Glad you enjoyed it!

@onjofilms Жыл бұрын

3:00 your Bosch washing machine is done.

@kenmore01 Жыл бұрын

Great video Scott! I suspect your ferrite toroid had issues due to saturation, due to the uni-directional currents in it. Either add a small gap by using a multi part core, or go with high permeability powdered iron.

@jlucasound Жыл бұрын

Hi Scott! Thank You for all the GREAT videos!! :-)

@fcvgarcia Жыл бұрын

Great shot, Scott!!! Thanks.

@rougenaxela Жыл бұрын

Some years ago I designed and built my own SEPIC converter, and used an off-the-shelf part for coupled inductors with one core. Before I built it, I actually did simulations of coupled vs separate inductors and it helped the ripple out a bit. Once built, it worked quite well. My board also included a Ćuk converter which is basically when you take a SEPIC and swap the placement of the second inductor and diode, resulting in a negative voltage with very similar specs. Made for a nice stable+versatile bipolar +-12V supply.

@johntoe6127 Жыл бұрын

Nice video. I've been using these buck/boost converters in my projects for several years. They work great, and allow you to use almost any DC cube power supply without worrying about input voltage.

@andrebartels1690 Жыл бұрын

Although I'm not an electronics guy, I like your videos a lot, because they are very informative and understandable.

@basviel6288 Жыл бұрын

Thanks for All your video's. I have a SEPIC converter in Simulation program LTCad XVII. But NO matter WHAT i do, the current through the LOAD is Reversed. Till I saw this Video ! With D2 connected between Vcc and GND. NOW it Works ! Great Scott !

@SoloRenegade Жыл бұрын

You have some of the best electronics videos.

@greatscottlab Жыл бұрын

Thanks :-)

@ilankotzin3104 Жыл бұрын

Excellent video, Scott!

@CableWrestler Жыл бұрын

Outstanding videos in every aspect AGAIN. I truly respect you.

@greatscottlab Жыл бұрын

Thanks mate :-)

@Niels_Dn Жыл бұрын

I love using SEPIC in my designs. The biggest benefit is that they are inherently failsafe, there is no fault mode in which the input voltage can be on the output. Also if you need positive and negative rails, you can use the same regulator chip for SEPIC and inverting.

@MD-vs9ff Жыл бұрын

C1 fails short.

@Niels_Dn Жыл бұрын

There is a chance yes, but if I remember correctly from Siemens’ SN29500 the chance is relatively small. And then you can split up C1 to make the design even more robust.

@eDoc2020 Жыл бұрын

I'm looking at the schematic with coupled inductors and it appears if you remove the coupling capacitor you end up with a flyback converter. It just goes to show that all the different DC-DC converter topologies are actually very similar in operation.

@dragoscucu3128 Жыл бұрын

Also USB 1-30V CC CV converters are using SEPIC topology. They are really handy to use, but the efficiency is about 60%

@FadiFadi00 Жыл бұрын

Love your videos, it’s so simply explained yet very informative, I wish you could make more videos of coupled inductors since it’s a rare topic on the internet!

@GowrishankarLeGrand Жыл бұрын

Informative as always! Thanks mate!

@BRUXXUS Жыл бұрын

It’s kind of amazing that buying two inductors is significantly cheaper than a single coupled one. I suppose there’s just not a big enough market for them to compete on price, huh? Super cool video! Especially the DIY circuit at the end.

@kenmore01 Жыл бұрын

Winding a single is much easier than winding a dual with most winding machines.

@y2ksw1 Жыл бұрын

This is without doubt a very useful project

@greatscottlab Жыл бұрын

Glad you think so!

@thatAlex1337 Жыл бұрын

I would love to see a video about vacuum flourescent displays!

@sampathrocky4694 2 ай бұрын

So informative , Thanks a lot man

@Harish-gv5jm Жыл бұрын

Eagerly looking forward for next episode of "Diy or buy" as frequency modulator ( FM radio)

@PhG1961 Жыл бұрын

Awesome and very well explained. Great Sunday afternoon entertainment !

@greatscottlab Жыл бұрын

Awesome :-)

@dunghowproduction5238 Жыл бұрын

Sir i love your hand writing

@melplishka5978 Жыл бұрын

Your definitely one of the most intelligent you tubers lol. Live your channel. When I finally get my parts replaced and back too work I’m definitely funding your channel lol. Ty for your time and research my friend.

@greatscottlab Жыл бұрын

Awesome! Thank you!

@farosrohmangeloraramadan3897 Жыл бұрын

@@greatscottlab Next project Cuk Converter pleaseeeeee

@TheShedevri Жыл бұрын

Very good video Mr Scott.

@paulfontaine7819 Жыл бұрын

Great video Scott. I learned a ton. Next week your prototype PCB will be shipped by your sponsor JLC PCB I guess ;-)

@MCsCreations Жыл бұрын

Fantastic video, dude! Thanks a lot! 😃 I'm definitely going to look around for those!!! Stay safe and creative there! 🖖😊

@greatscottlab Жыл бұрын

Thanks! You too!

@user-tz3fd8hm4q 4 ай бұрын

I actually built a SEPIC converter on a perfboard recently. It can output up to around 50W of power and comes with an efficiency of around 80-85%. Anyway, great and educational video!

@AhmedSoliman-qo6gq Жыл бұрын

You generally need lower inductance if you used a coupled inductor. It isn't just the efficiency but also space reduction :)

@chaosdragon6718 Жыл бұрын

For higher currents, a 4 switch buck-boost will always be the better solution. SEPIC (as well as inverting CUK type ) switches VIN+Vout on its switch node and carries the large du/dt EMI problem. And you switch more current than Iout. That to a much larger Hot loop which includes the SEPIC coupling capacitor. In essence, you store the complete transfer energy in the inductive components so those inductors have to be sized that way.

@sanjikaneki6226 Жыл бұрын

nice, often i see boost buck and sepics being combined IC that efficiency seems low tho at 60% a LDO may be better ( if it is lowering) Also maybe make a video about the energy efficiency of all those converters .

@thomasschellekens5084 Жыл бұрын

Hey, your voice sounds like you are (recovering) from sickness. I wish you the best!

@jafetmartinez3898 Жыл бұрын

Great video. Can you compare the SEPIC with the non inverting buck-boost to see which one is mor efficient? Thanks.

@allthegearnoidea6752 Жыл бұрын

Very enjoyable video. Best regards Chris

@greatscottlab Жыл бұрын

Glad you enjoyed it

@stevenA44 Жыл бұрын

Interesting. Do you have a video on that device with the display and the fan/heatsink?

@rocketsmall4547 Жыл бұрын

thx for ur videos. will watch

@karakson Жыл бұрын

Perfect video! Thank you!:DDD

@Drxxx Жыл бұрын

Amazing channel, super video!!

@greatscottlab Жыл бұрын

Thank you very much!

@PeetHobby Жыл бұрын

I think you can build a boost converter circuit on a perfboard but you must put the components much closer together, the distance you use wouldn't work properly on any PCB type I think. All datasheets of switching power supply IC's are always hammer on that you must keep the loops as short as possible.

@yashdodia8048 Жыл бұрын

I am your big fan great scott

@andreiflorea3865 Жыл бұрын

Hello Scott, how you made your beginning perf board logo? You connected your LED's in parallel or series?

@ccoder4953 Жыл бұрын

I have alot of experience with SEPIC and Cuk converters. Coupled inductors are great. They can be more efficient (alot of variables there though), they have better dynamics (dual inductor SEPICs and Cuks have some high frequency resonance that can make compensation harder), and the overall solution size can be smaller than for dual inductors. What I've seen is for name brand (like Coilcraft and Wurth) inductors, prices are comparable between two singles and a coupled. But the market for singles is bigger, so its easier to find other manufacturers of singles. Also, worth pointing out that I've heard Dr Cuk is adamant that a Cuk converter built with a coupled inductors isn't really a Cuk converter.

@Blox117 Жыл бұрын

lol "cuk"

@ccoder4953 Жыл бұрын

@@Blox117 It's named for en.wikipedia.org/wiki/Slobodan_%C4%86uk . Funny name perhaps, but he's Serbian, that is his name, and that is indeed what it's called.

@triffid0hunter Жыл бұрын

@@Blox117 Apparently it's pronounced 'chook'

@Blox117 Жыл бұрын

@@triffid0hunter oh i see, there is an accent mark

@yeyuan6273 Жыл бұрын

dude, the sepic is noesing as fk, but i have to use it, how to reduce the ripple to 5mv under 12v at 3a? i have tried everything........rc lc re apsorbtion, comm choke, what i did wrong? it keep around 100mv at 1a ar 12v, i cant knock it down further.......

@handlesarefeckinstupid Жыл бұрын

Very interesting. Thanks for the content.

@greatscottlab Жыл бұрын

My pleasure!

@mohammedmariff9034 Жыл бұрын

hi scott did you make board with automatic li on charger with load sharing or power path function ? powering your project automatic while its connected to 5v usb and without damaging battery

@donlorinsharp Жыл бұрын

Hello from Georgia, USA! I really appreciated this video. I do have a question that I would like to ask. I'm adding heated seats, grips, gloves, and primary clothing layers that will run off of my bike for cold weather riding. The bike has very little extra power so I'm changing all of my lights to LED and I want to use a solid state timer for the signals rather than simply adding resistors to prevent hyperflash. Most of the heated element controllers use a resistor for the lower temperature settings. It seems to me that I could use one of these boards to control the temp and actually conserve amps by using a lower setting If my gauge showed a constant draw on my battery rather than a 2a or so charge. Am I right. I'd use the FP5-139 to get the most out of each amp put out by my charging system.

@jafinch78 Жыл бұрын

I'm thinking the Prof. Slobodan "Cuk" converter deserves a thorough review. Somewhere I have my first power supply kit I built, a SEPIC-Cuk split rail design to emulate a low power computer PSU and I'm trying to recall what specifically. Man, I forget, seems like something maybe SDR related though I forget. Neat design.

@XdewGaming Жыл бұрын

Where do you find the silver copper wires you use? I haven’t be able to find them for years now.

@mannyquinn9031 Жыл бұрын

Beautiful video :) ...at 10:21 is there a missing Gnd potential at the mosfet ??

@GuianLorenzo 3 ай бұрын

( 1:21 & 6:22 ) I have used a SEPIC voltage converter that uses a coupled inductor and it has some decent efficiency and also has some protection features which is nice. The only concern I have is the EMI it might be producing specially I used mine on an audio amplifier build and it has some weird issues "sometimes" specially on its aux mode, might have to some tests on it to confirm those thingies.

@fxandbabygirllvvs Жыл бұрын

I would like to know if there's a current limit to them or can I send alot of amperage form one?

@StanleySeow 10 ай бұрын

At 9:33, what is the name of the converter module you recommend ? There were no text on the video and I can't see it from the video alone ...

@Gamezone-sd3er Жыл бұрын

What a great information 😯😊👏 thanks

@greatscottlab Жыл бұрын

Glad it was helpful!

@chillydickie Жыл бұрын

awesome. use this all the time. finally learned how they work

@greatscottlab Жыл бұрын

Great to hear!

@Nono-hk3is Жыл бұрын

The SEPIC buck-boost design is more elegant than I expected it to be.

@altaherhmad2266 Жыл бұрын

Nice work👍

@enlaescnoaprendinada Ай бұрын

el circuito que armas ????? esta subido en algun lado? quisiera ver el feedback de tension

@thanatosor Жыл бұрын

Damn... the comment section is moved again. As usual, great content, Scott ! Wish I could do something with this but nah, not even my profession neither my job, still watching this xD

@akudikechinedu8393 Жыл бұрын

Very good video Mr Scott. please what is the link for the module you recommended?

@try-app Жыл бұрын

Great.. too much information..i learn new..thanks a lot for such a good video..

@matthewday7565 Жыл бұрын

I'd guess that a specific boost or buck circuit is more efficient, to take a simple example in a 12V to 24V boost, half the output power is coming directly from the input, while it's a bit less than half in a 12V to 5V buck

@Redbuild_ Жыл бұрын

Greetings from Germany and from southern part of Bayern

@greatscottlab Жыл бұрын

Greeting back ;-)

@After_Tech_Industries Жыл бұрын

I was wondering if I could use a filter choke as a coupled inductor?

@tarrySubstance Жыл бұрын

very interesting video.l really enjoyed the premise of the video.

@greatscottlab Жыл бұрын

Glad you enjoyed it!

@fritzwalter1112 Жыл бұрын

Moin, I have a question regarding buck/boost converters. I have one of these standard 9(or 12, or 24)V DC Plugs. But if I hook them up to a buck boost converter, I can change the output. The output voltage stays constant at 9, 12 or 24 volts. The converters are otherwise okay. I can change the output of these fancy USB c PD boards, but these DC plugs just don't work :(

@lrrromicronpersei8294 Жыл бұрын

Nice job 👍

@nithikasandinu9034 Жыл бұрын

Get well soon brother ❤️‍🔥

@greatscottlab Жыл бұрын

My voice is already much better :-) Thanks.

@planktonfun1 Жыл бұрын

I need that buck boost converter, but I need a very small one for a drone, do you a circuit diagram?

@tux1968 Жыл бұрын

Do you have a link to the SEPIC converter you recommended in the video? I don't see it in any of the links you gave in the description, which did not use the IPD088N04L part.

@greatscottlab Жыл бұрын

Sorry but I was not able to find that converter anywhere. I got it a long time ago. But the XL6009 is only slightly less efficient. So I would recommend that :-)

@umer6069 Жыл бұрын

Whats the name of the device with the big heatsink and fan with a bright whiter display which you use to test the load

@hakamsaffour Жыл бұрын

Thanks for the interesting clip Can you provide a link to the buck boost converter recommened by you? (the one with very low resistance?)

@hakamsaffour Жыл бұрын

Any advise?

@WagonLoads 6 ай бұрын

@greatscottlab Do you know if aliexpress has any variable power modules that can be controlled though i2c.. I want to make a i2c controlled bench power supply. Maybe modify the Dave Jones PWM supply, using a i2c PWM servo controller and ADC feedback to make sure the output matches what you asked for.. and make a triple output supply

@oha5929 Жыл бұрын

I'm designing a power supply around 60v. Will this design be able to withstand 60 volts? What changes are needed to get there?

@dhruvkachhiya9897 Жыл бұрын

Is this commercial Buck converters are coming with close loop control (I mean, is it change its duty according to the change in output voltage? As we know, the output voltage may change with change in load. Please, give your thoughts.) Thanks, in advance

@nickpayne1182 Жыл бұрын

That sounds like a constant current/constant voltage (CC/CV Buck) converter. The LM5117 is just one example, but I bought some cheaper ones from Amazon years ago because I needed constant current control for running LEDs. They use feedback loops to monitor current & voltage.

@tanneraerospace7301 Жыл бұрын

Any improved eff if you ran 2 buck boost converters in parallel to one load?

@MrBobWareham Жыл бұрын

Thanks for the video, it was very interesting to see a different approach, perhaps you can help me with a problem, I want to make an 18650 12v power supply to run an emergency LED light, so do I put three 18650 in series to give me my 12 volts or do I put my 18650 batteries in parallel to give me 3.7 volts and boost that voltage to 12 volts, any suggestions for the best method? Thanks, Bob in the UK

@legendelectrics4668 Жыл бұрын

Interesting video👏. Can I use SG3525 ic instead of TL494 ic for the DIY version

@ChristieNel Жыл бұрын

Very interesting! What other buck-boost converter designs are there that are more efficient?

@revimfadli4666 Жыл бұрын

Dahono converters?

@Nicoya Жыл бұрын

Have you considered using a synchronous switching configuration rather than the diode? Perhaps that would give you a better efficiency payoff than using the coupled inductor.

@yeyuan6273 Жыл бұрын

using a transformer ensure 5percent increase, lossen coupled one gives anther 1percent boost, a llc typology needs pmos, or bootstrap, whichs means bad, really bad, especially in boost condition.......

@MikeKranidis Жыл бұрын

Very informative video, congratulations! I can't find the link for your chosen convert, can you give me here. Thanks.

@QuakeDragon Жыл бұрын

The video mentions FP5139 as the most efficient, but the US Amazon link takes us to the XL6009. Is this correct?

@kikisoimmunasir5699 7 ай бұрын

Please explain where the input and output are located on SEPIC

@qcumbercoolfpv1988 Жыл бұрын

would be awesome to see your thoughts on the sw2303 with power distribution

@jameshancock Жыл бұрын

What happens to efficiency if you make it synchronous? I’d think you’d get it way more efficient. I’d love to see more videos on boost/buck with ultra high efficiency for sure.

@chrishartley1210 Жыл бұрын

Synchronous 4-switch devices are much more efficient and can handle much higher currents. Of course the down side is that they are much more expensive and are also becoming quite hard to find. My preference for stable voltages with very little ripple are ones based on the LTC3780, the output is so stable that I have very successfully used them for mobile radio, something which is near impossible with most non-linear converters. I realised early on that Sepic devices would not be adequate.

@jameshancock Жыл бұрын

@@chrishartley1210 ya a full bridge is a solution but the problem with full bridges is that they require p channel high side which means you can’t use ganfets. I’m wondering if sepic with the diode replaced with another fet woold get you to n channel nirvana.

@chrishartley1210 Жыл бұрын

@@jameshancock The 3780 (and 3789) drives 4 N-channel MOSFETs.

@jameshancock Жыл бұрын

@@chrishartley1210 wow. Gotta see how they do that because a pump can’t work so how are they keeping the top fets open 100% of the time?

@explorerpragun431 Жыл бұрын

Thanks man

@greatscottlab Жыл бұрын

You're welcome!

@dmz93 Жыл бұрын

Is it just a mistake on your DIY schematics or source of Q1 is really not grounded? How the DIY version compares to the others when it comes to efficiency? Great video, I love your videos on power converters. Very educational.

@McTroyd Жыл бұрын

I would have thought the two coils in close proximity would couple anyway. Perhaps not as tightly/efficiently as two windings on the same ferrite ring, but... it's something?

@stephensu4371 Жыл бұрын

nice job

@alis990 Жыл бұрын

TL494 is awesome choice. You can even make ~240V DC boost to drive vacuum tubes. Not recommend for beginners, but you can check out Mr Carlson's Lab.

@SlavTiger Жыл бұрын

I've got some fiber optic cable laying around, how about a video showing some potential uses?

@dantronics1682 Жыл бұрын

having a capacitor in series protects the output incase the buck transistor fail on a short but doesnt the capacitor limits the amount of current in a sepic converter?

@geek.vill8028 Жыл бұрын

I made a boost converter using a 555ic and an irf540 mosfet. I used a sepic winding of 150uf. I could get 9v input 99v output. It was fun. I'd love to know what you think of it.

@jassrandhawa8426 Жыл бұрын

555 ic in not efficient for this type of circuit