Universal step-up and step-down converter
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- čas přidán 3. 07. 2024
- Best PCB prototype ($2 for 10 boards): jlcpcb.com
Download archive www.kit-shop.org/zip/pov.zip
Buy DC-DC step-up inverter got.by/2jhb9r
DC-DC step-down inverter got.by/2jhbd9
IRFZ44 got.by/2jhbpi
UC3843 got.by/2jhbrn
600pcs resistors got.by/2jhbvc
7812 got.by/2juj3c
Capicators got.by/2juj4w
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Russian version • Повышающий/понижающий ...
5 pin - GND
i like your channel a lot is very help full but this video had issues, i count 4 caps at the archive at 50 volts and 1000 μf and those caps are missing from the pcb that you demonstrating also, at the pcb there is a12 linear voltage regulator but missing from the archive, i admit that i need a diy robust boost-buck converter but i will not try this one
mam only 12 volt input it can take ,so we can use an lm 7812 for high voltage
thanks for 1 hours trouble :D. Please update the video so viewers will not experience the error.
how come you post the circuit with error pin 5 uc3843 not connect to the ground, you want people make fireworks at home???
@ Kasyan TV
How come one should Make with the printable PCB schematic preferably on back and white paper to transfer the ink to copper clad
No printable copper clad PCB schematic link provided in description
No ready made schematic program from eagle or proteus, no link provide in description to download schematic file and you want to order it from JLCPCB ? Without giving the file
No list of proper components or you did not mentioned how many turns of magnet copper wound on the ferrite core
So that make your project easily, if don't to help us and you just wants views earn from CZcams, by promoting JLPCB And Promote your own mobile Application for making money
Looks like these channel is as Hoax
So Best of luck, your channel won't last much longer .
The time you expend on these projects is really appreciate
Keep up the good work
The voice on this video is one of the better computer synthesized voices I've heard in a long time!!
You'd better check his russian videos.
I think that himself is a great narrator!
This channel is just awesome. Thank you for your work Kasyan TV.
i repeated this circuit, & it worked flawlessly, soon i'll provide link to that i altered the components according to my availability but, it didn't came in middle of working of the circuit, thank you kasyan tv for sharing this circuit with us
Efficiency
Can the circuit handle an input of 37volt
Thanks for providing such a good design ,tested ckt working fine.
Is this circuit working
Can we get 220v at 100mA
Very nicely explained about the circuit function.
Great job man, thanks for sharing! I'll make for myself slightly modified.
Clear and precise as usual.
Really enjoy your videos....from South Africa
Super nicely explained!!! As always
Great, as always. Thanks for your work!
i was waiting for a project like that
youre awesome! I love your videos! learn so much from them!
Please make more helpful videos like this.Thanks.
I designed the same and schematic diagram is same like you. But Choak get super hot. With 1.3mm dia of wire
Love it, thank you . will come in great use.
excelente como siempre
saludos
Thank you for your wonderful tutorial please how did you select your inductor and filter capacitor value
Kasyan, it seems there is a mistake in the schematic: C8 & C9 are not grounded, but connected to the AC side of the secondary. Their positive side also is connected to IRFZ44’s Drain, which may short-circuit it (at first sight).
I downloaded “now” (March/2023) the schematic and it shows the same.
In case the schematic is correct I would appreciate a brief explanation why it was done as like that. Otherwise, it might be enough to update the Zip file and anchor an “author’s comment” with such update.
Thank you for sharing, I’m very fond of your channel!
Look into the circuit of a buckboost converter...It functions always like your circuit. Try that...It only need only one winding insted of two that you used.
Great job 👍👍👍
Good circuit, so can you add CC Mode “ current limiting “ to your circuit, for example using LM358 ...
keep up the goodwork
EXCELLENT CHANNEL!
Nice video plz make video about 30ah mppt solar charge controller circuit
Very good video thank you
If you add a simple display for output voltage will be much useful :)))
Excellent
great project
nice kasyan TV thank you,
If I add 2 irfz44 mosfets in parallel can increase more power ?
Try adding a constant current feature!!!
Plz make video about mppt solar charge controller circuit.
Yes please!
60 % effectivity :) (Input: 15.1 V @ 5.95 A, Output: 21.55 V @ 2.47 A)
That's because of liner voltage regulator for the 555
Sepic converters, do we need a larger heatsink to get more amperage or parts?
Great video thank u
Can we make a 20amp converter with similar circuit by just using beefy mosfet and inductor?
Please how did you calculate the value of the choke inductor you use
thank you
I have a similar circuit. It has 120w output. 2 same mosfets used. the first mosfet's drain leg is connected with the second mosfet's source leg. There is a single winding inductance and first mosfet after inductance. The first mosfet's source leg given to the ground. I understand the situation when mosfets are connected in parallel, but can you explain the situation when connected in series? As in the circuit i tried to explain... Is there such a video?
Hi. this circuit can be modified to have an output of 180 Volts AND 3A, using 5 or a maximum of 12 Volts.
Can you please help why it is happening. My core is same like you in dimension also
Nice circuit. what do I need to do in other for me to get 10amps from this circuit
In the schematic you use morethan 3 elco but in real i just see 2 elco,can you explain?
can we modify this circuit to have current adjuftment at output using a potentiometer
I am trying to make this converter with the help of your Circuit Diagram... As someone mentioned in the comments that C8 and C9 goes directly to the mosfet? In your video I can only see 2 caps which I presume are the input and output filter caps. So did you omit C8 and C9 or what?
VERY NICE......!!!!!!
why do you choose those values for all the elements in the circuit?I just want to know the theory inside
I made the circuit but there is a huge voltage drop at output even on smaller loads
Help!!
Nice project... But isn't 60% efficiency a bit low?
I have recreated this boost-buck converter with great interest. Except for 2 modifications, the proposed layout and assembly was used. The right side of the board has been stretched a bit to make room for 10mm diameter capacitors. The diode was replaced by MBR20100 (dual as shown in the layout).
The converter works. The coil (core T106-26, 93 nH/N², 2 x 10 turns 1,2mm copper) gets louder with increasing load and hot, really hot, at 2 amps 70 degrees Celsius after 2 minutes.
Input 12.1V / 5.2A - Output 13.8V / 2.16A - Efficiency 47% :-(
Maximum output voltage with this choke and R1 at 1 kOhm are just under 18 volts at 12 volts input, that's ok. Will test again with 14 turns and different core.
Any suggestions (core, heat problem)?
I played around with the converter.
I would like to say in advance that this concerns only my built version, I have no expertise and the changes can be completely wrong.
Step 1: The most critical component of a DC-DC converter is the choke. At 8,2 kOhm and 2,2 nF, the UC3843 frequency is at ~ 95 kHz. I've added 4 extra turns, almost doubling the mH (from 0,014 mH to 0,024 mH). The winding ist now 2 x 14 turns. A reduction of the resistance from 8,2 kOhm to 6,1 kOhm causes the switching frequency to rise to approx. 125 kHz. Overall, the efficiency has thus increased by almost 7%, but at 54% is still far too low (input 12V / 4.2A - output 13.8V / 2A).
Step 2: Control of the power FET. The signal of the UC3843 starts to oscillate under load. A 33 μF capacitor between pin 5 (GND) and 7 (VCC) of the PWM contoller also solved this problem. Efficiency is now just above 62% (input 12.1V / 3.6A - output 13.8V / 2A)
I was able to greatly reduce the "noise level" under load by connecting the heat sink on GND. (Check insulation of mounted components!)
The heat problem is much less, but still there. The power required at the entrance has dropped by 20 watts, unlike the beginning.
I would suggest a larger bobbin and thicker winding (~ 2mm). But for this you could already buy a ready-made buck-boost converter with much higher performance :-(
For smaller performance, however, the DIY-module shown is still usable. I changed R1 from 1 kOhm to 4,1 k Ohm to get a voltage range from 4,2V to 24V, thats fine.
Thank you
I guess the core heating is due to magnetic saturation. Even for iron powder cores it is not wise to exceed 0.5 T. You can calculate magnetic field strength by multiplying the current with the number of turns and divide it through the magnetic length ( pi/2*(D+d) ). The result must be multiplied by µ0*µr. If the core saturates, the current rises to the current limit or resistive limit. The electric power is converted into heat.
This could also be the reason, why the efficiency is so small. The UC3843 is also not capable to drive enough gate current for fast switching of MOSFETs with significant input capacities and gate charges. So it is better to use a gate driver IC behind its output pin, which can deliver at least 2 A in source and sink modes.
ok! thank you
I see there are 6 x 1000uF caps on the circuit diag. 4 of them being 50 volt and 2 of them being 25 volt. Yet there are only 2 large electrolytic caps on the board. Is that board an early proto of the final product? What are the inductance of the coils?
great project ,, i'm still watching coz the jumper still confused for me..
DIODEGONEWILD circuit?
Please send a detailed video of dual output 12v and 5v SMPS supply
Thanks
Hi teacher
I realy need this circuit so i made it exactlly but it was very bad to charge laptop so i made another circuit with xl6009 ic it is good for laptops charging.
Thanks allot .
Please upload a circuit boosting 12v to 48v to run a DC 1000watt motor
i need about 100W at the output for 19VDC to charge the laptop. so what component should i change ??
I made one but now i don't know what to do with that 120V in that capacitor.
What is the inductance of the toride
Very nice
en el diagrama in the diagram there are 6 electrolytic capacitors ,but in the pcb there are only 2 because
What changes to do to get 10 amps output?
clarifies this because in the pcb there are only 2 bone electrolytic capacitors whit polarity but in the diagram there is 6
The schematic shows 3 groups of capacities. Input, output and between the coils (Cuk-Converter). The number of capacitors used reduces the ESR properties. In principle, however, it does not matter if 1 capacitor or several small capacitors connected in parallel are used. The input capacitor was not executed on the layout. If the input is strong enough, this is not absolutely necessary.
there are 3 caps (2x1000uf) on the circuit, but only 2 caps (1000uf- i/o filters), on your board, how about the midle caps, Sir?
Hello Friend. Do you have more references about the calculation for the inductor? I'm looking for all the conciderations needed to calculate those coupled inductors. Can anybody help me please?
how can make like this with an output of 15v 0 15v and 48v output??
Can this circuit be used as solar charge controller?
Please make a video of mppt solar charge controller with display. Thanks 👍
Hello 👋
We can wind more turns ...?
saludos!
Could let me know how match voltage for max and the minimum with high load.
Thanks
Nice
can you use the pwm 3845 ic too?
How much max current it can draw continuously
How to decide turns over inductor??
sir kasyan one thing i will ask before doing this circuit what is the voltage feedback on this uc3843 what voltage you set to R3?
pleasse answer me.. i want to know im a hobbiest im truggling understanding the datasheet in voltage feedback....
Please make with current limit
👍🏻
Is it possible to add more mosfets in parallel to gain more power?
I want to build MMPT around 60amps at 55v output from solar panels 75v to charge 48v acid lead batteries..4 battery in series
im not sure that UC3843 can provide enough power to gates more than one mosfet.what do you think?maybe to add in circuit push pull totem pole for gate of 5 mosfets or more?Can feedback input of UC3843 can handle 55v
how would you do that?
3.7v to 5v booster circuit plz .....this circuit is great and give us small and 1A 5v power output from 3.7v 18650
thank u
hi friend and thank a lot for goold channel.
can i control current in this circuit?
thanks a lot.
It's good for a solar panel in order to charge batteries ...
what is the transformer function in the circuit ?
Hi Everyone. I made the pcb and circuit. But max voltage isbonly 18v and drops a lot under load. Any idea where to look at ?
no ,entiendo en la pcb hay como 6 condensadores pero en circuit solo hay 2 porque ?
l made this circuit. bt mosfet burns .
What means by single ended? Pls explain
Hey pls make a 500watt inveter circuit with atx power supply transformer
Please can I increase the output to about 40amp
Were is components list ?
Can i use 19v input?
how do i take advantage of the free shipping on first order? i tried placing order once and it shows that i have to pay 18.60 US dollars for the shipping
marlon bayaras same happened to me
Can you share PCB layout on pdf file? Thank you very much
where is the ground pin of IC
This converter have no variable current and test its voltage drop with different load
can you design only a buck converter with uc3842 please?
Lenar OX uc3842 has a higher uvlo. So it may not be a good ic to use for battery powered stuff.
hi Kasyan how to use your zip fles too order from jlpcb? i upload zip file on jlpcb side but the file does not work? Big thanks for all videos🙋♂