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
@ 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 TH-cam, 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 .
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!
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
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.
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?
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?
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?
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?
It has a inbuilt transistor within the chip. You can either tweak the chuop to get the control signal direct or drive your external fet with inbuilt transistor. If later is the case, then so add a emitter follower bjt stage or add a inverter function chip with decent slew rate inorder to provide correct pulse to your external Mosfet.
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....
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.
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.
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?
Hi Mam (Kaasyan). I am a hobbyist I made the above circuit it is working but as i put load the output current drops down. I need 5A to drive 2Nos 775 Motors which I am not getting. Could you suggest what to doooooooo. my circuits all electrolite caps are 1000mfd/50V. any change?. This circuit is for my RC Boat. Power source is Lion battery 11.1V 5400mAh to boost 12 to 24V 5A. Your help will be very needfull. Thanks.
It's difficult to have the low ESR capacitors at 110kHZ(C8 ,C9). I think "Flyback Converter" should be much better for diyer.(remove C8 ,C9...and swap the transformer output two pins)
Capo Boghikian Bhai apko ice room cooler Dy sakta hon 12 volt ka Jo apky 12x12 KY room ko 30 minutes main thanks krdy gha Mera number yeh hy ap muje what's up per bhi contact KR sakty Hain 0335-3775280
The integrated circuit doesn't work with less than 9 volts, so you should use a small commercial step up converter to power the control electronics, otherwise you should change the circuit
Not possible because the ic used will not work with less than 7.5 volts which is the threshold voltage of the I.C.Still you can use by adding one more boost converter self designed or easily available for cheap rate in the market prior to the main circuit only for driving.
MrBrymstond the current limiting factor is the switching transistor & transformer. Bigger capacitor may not necessarily get you more current. Just a delayed response to voltage changes and transients. So to increase current you would wind a bigger transformer, input more current and change the mosfet to a beefy one that can hand le such.
This seems to be Flyback topology . Am i right ? If yes then how come there's no air gap in between the core. I m assuming that the effective air gap caused by the powdered metal core is sufficient to store energy. If someone gets this please let me know.
i have a random question . i have a small capacitor 2200μF 10V and a bigger one 330μF 200V which one is stronger and why? i would like a full detailed info , btw im nub in electronics soo... :) , thnx in advance!
@@manoshorozopoylos5171 Ο πυκνωτής που λειτουργεί σε μεγαλύτερη τάση, σε σχέση με έναν ίδιας χωρητικότητας που λειτουργεί σε μικρότερη τάση, μπορεί να αποθηκεύσει μεγαλύτερο ποσό ηλεκτρικού φορτίου από ότι ο άλλος και μάλιστα το ηλεκτρικό φορτίο αυξάνει εκθετικά ως προς την τάση. Αυτό είναι όλο το θέμα. Στο παράδειγμά σου, ο μικρότερος σε χωρητικότητα πυκνωτής θα αποθηκεύσει πολύ μεγαλύτερη ενέργεια από αυτήν που θα αποθήκευε αυτός που λειτουργεί στην μικρότερη τάση. (Ε=1/2 x C x U^2 είναι ο τύπος που δίνει την απάντηση στο ερώτημά σου).
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
According to Datasheet, UC3844/UC3845 are same, so no. The only ones that are different are UC3842/UC3843 which are used with a bigger Duty Cycle up to 96%.
C8 and c9 is all wrong. Your getting positive voltage through the caps by shorting them coupled to the negative voltage. You can't get load sharing with two diodes in parallel either.
The 12 volt input is supplies the voltage but it goes through c8 and c9 The anodes of the diodes should be on the coil from the 12 volt line. You don't need the caps after the coil and only one coil is needed.
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 TH-cam, 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 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!
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!
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
The time you expend on these projects is really appreciate
Keep up the good work
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.
In the schematic you use morethan 3 elco but in real i just see 2 elco,can you explain?
Please can I increase the output to about 40amp
Plz make video about mppt solar charge controller circuit.
Yes please!
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?
C8 and C9 (2000uF) go from the mosfet to the output? Never seen that before. That won't work out very well.
This is a Cuk converter.Its not the avarage buck/boost converter you'll find in youtube. The original design is like this :)
@@dimitriosvlamis8696 Actually SEPIC ... Singled Ended Primary Inductance Controller.
Much more efficient than Flyback and Forward converters
Hello is it normal inductor getting too hot?
DIODEGONEWILD circuit?
Thanks for providing such a good design ,tested ckt working fine.
Is this circuit working
Can we get 220v at 100mA
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 ?
why do you choose those values for all the elements in the circuit?I just want to know the theory inside
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?
nice kasyan TV thank you,
If I add 2 irfz44 mosfets in parallel can increase more power ?
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🙋♂
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?
I made the circuit but there is a huge voltage drop at output even on smaller loads
Help!!
Hello 👋
We can wind more turns ...?
Good circuit, so can you add CC Mode “ current limiting “ to your circuit, for example using LM358 ...
guys can you help me i am first year college and chose this as my first project, so, can you list the precise materials that will be needed.
Please send a detailed video of dual output 12v and 5v SMPS supply
Nice circuit. what do I need to do in other for me to get 10amps from this circuit
I designed the same and schematic diagram is same like you. But Choak get super hot. With 1.3mm dia of wire
where can i buy the core of that size for the transformer?
lõi ferrite đó tháo trong nguồn atx cho khoẻ
can you use the pwm 3845 ic too?
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?
Can we make a 20amp converter with similar circuit by just using beefy mosfet and inductor?
I made one but now i don't know what to do with that 120V in that capacitor.
Can you please help why it is happening. My core is same like you in dimension also
Hi it is possible to design Step up Step down converter using MC34063 and external MOSFET ?
It has a inbuilt transistor within the chip.
You can either tweak the chuop to get the control signal direct or drive your external fet with inbuilt transistor.
If later is the case, then
so add a emitter follower bjt stage or add a inverter function chip with decent slew rate inorder to provide correct pulse to your external Mosfet.
Sepic converters, do we need a larger heatsink to get more amperage or parts?
Please how did you calculate the value of the choke inductor you use
Thank you for your wonderful tutorial please how did you select your inductor and filter capacitor value
Nice project... But isn't 60% efficiency a bit low?
what is the transformer function in the circuit ?
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?
Can this circuit be used as solar charge controller?
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....
how can I get your product?,. I need buck boost converter diy kit
How much max current it can draw continuously
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.
What means by single ended? Pls explain
no ,entiendo en la pcb hay como 6 condensadores pero en circuit solo hay 2 porque ?
where is the ground pin of IC
Can you share PCB layout on pdf file? Thank you very much
What is the inductance of the toride
i need about 100W at the output for 19VDC to charge the laptop. so what component should i change ??
Try adding a constant current feature!!!
how can make like this with an output of 15v 0 15v and 48v output??
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.
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?
l made this circuit. bt mosfet burns .
Hi Mam (Kaasyan). I am a hobbyist I made the above circuit it is working but as i put load the output current drops down. I need 5A to drive 2Nos 775 Motors which I am not getting. Could you suggest what to doooooooo. my circuits all electrolite caps are 1000mfd/50V. any change?. This circuit is for my RC Boat. Power source is Lion battery 11.1V 5400mAh to boost 12 to 24V 5A. Your help will be very needfull. Thanks.
add a soft start circuit
Hi. this circuit can be modified to have an output of 180 Volts AND 3A, using 5 or a maximum of 12 Volts.
How to decide turns over inductor??
This channel is just awesome. Thank you for your work Kasyan TV.
It's difficult to have the low ESR capacitors at 110kHZ(C8 ,C9). I think "Flyback Converter" should be much better for diyer.(remove C8 ,C9...and swap the transformer output two pins)
Will many ordinary electrolytic capacitors connected in parallel help in lowering the ESR ?
Cual es el voltaje máximo de entrada?
What is the value of the choke/inductor?
I dont know but it probably 100uh
how come you post the circuit with error pin 5 uc3843 not connect to the ground, you want people make fireworks at home???
Please upload a circuit boosting 12v to 48v to run a DC 1000watt motor
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.
can u make a peltier cooler
Capo Boghikian Bhai apko ice room cooler Dy sakta hon 12 volt ka Jo apky 12x12 KY room ko 30 minutes main thanks krdy gha Mera number yeh hy ap muje what's up per bhi contact KR sakty Hain 0335-3775280
Sherazi sherazi hussain bro please english!
Is it possible to change the circuit from an input voltage of 6 volts?
The integrated circuit doesn't work with less than 9 volts, so you should use a small commercial step up converter to power the control electronics, otherwise you should change the circuit
Not possible because the ic used will not work with less than 7.5 volts which is the threshold voltage of the I.C.Still you can use by adding one more boost converter self designed or easily available for cheap rate in the market prior to the main circuit only for driving.
en el diagrama in the diagram there are 6 electrolytic capacitors ,but in the pcb there are only 2 because
7812 devre şemasinda neden yok
What modifications are needed for 12V 500W output ?
47uH 10x 20SWG wire
Kasyan TV+ can't we add a 35 ~ 50 volt capacitor with a larger value for current?
MrBrymstond the current limiting factor is the switching transistor & transformer. Bigger capacitor may not necessarily get you more current. Just a delayed response to voltage changes and transients. So to increase current you would wind a bigger transformer, input more current and change the mosfet to a beefy one that can hand le such.
Can i use 19v input?
This seems to be Flyback topology .
Am i right ?
If yes then how come there's no air gap in between the core. I m assuming that the effective air gap caused by the powdered metal core is sufficient to store energy.
If someone gets this please let me know.
No, its a SEPIC topology (Single-Ended Primary-Inductor Converter)
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
I would like to reach out to you privately for a discussion about the same. Please advise your suitable mode of communication.
Regards.
i have a random question . i have a small capacitor 2200μF 10V and a bigger one 330μF 200V which one is stronger and why? i would like a full detailed info , btw im nub in electronics soo... :) , thnx in advance!
What do you mean stronger??? Explain yourself.
in power lol ,
@@manoshorozopoylos5171 Ο πυκνωτής που λειτουργεί σε μεγαλύτερη τάση, σε σχέση με έναν ίδιας χωρητικότητας που λειτουργεί σε μικρότερη τάση, μπορεί να αποθηκεύσει μεγαλύτερο ποσό ηλεκτρικού φορτίου από ότι ο άλλος και μάλιστα το ηλεκτρικό φορτίο αυξάνει εκθετικά ως προς την τάση. Αυτό είναι όλο το θέμα. Στο παράδειγμά σου, ο μικρότερος σε χωρητικότητα πυκνωτής θα αποθηκεύσει πολύ μεγαλύτερη ενέργεια από αυτήν που θα αποθήκευε αυτός που λειτουργεί στην μικρότερη τάση. (Ε=1/2 x C x U^2 είναι ο τύπος που δίνει την απάντηση στο ερώτημά σου).
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 we give input voltage of 24 volts to this circuit??
Yes, but you have to add 7812 to the circuit.
I can't go the link below vid :((((
Please make a video of mppt solar charge controller with display. Thanks 👍
hi friend and thank a lot for goold channel.
can i control current in this circuit?
thanks a lot.
mem pls send me a diagram for 37v to 14v from a 24 v solar pannel......
Were is components list ?
Could let me know how match voltage for max and the minimum with high load.
Thanks
7812 at input can deliver 5amps????
No, it is only for the controller chip
how to increase the output current about 10 amp
could you pleas give me a replay
2x of mosfet and 2x of diode
can I use 3844 instead of 3843
please tell me😌
According to Datasheet, UC3844/UC3845 are same, so no. The only ones that are different are UC3842/UC3843 which are used with a bigger Duty Cycle up to 96%.
So you can use uc3842 ?
This converter have no variable current and test its voltage drop with different load
C8 and c9 is all wrong. Your getting positive voltage through the caps by shorting them coupled to the negative voltage. You can't get load sharing with two diodes in parallel either.
Daves Tech please explain about the caps. Yes, you don't get any benefit by paralleling diodes but since the package has two, why not use them?
The 12 volt input is supplies the voltage but it goes through c8 and c9 The anodes of the diodes should be on the coil from the 12 volt line. You don't need the caps after the coil and only one coil is needed.
@@davestech6357 You did not understand the circuit. Wikipedia -> Cuk Converter
@@wernerpeter9706 Right!
Can this be used to generate voltages in excess of, say, 200V?
Arşiv dosyaları paylaşır mısın?
It's good for a solar panel in order to charge batteries ...
Very nicely explained about the circuit function.
Hey pls make a 500watt inveter circuit with atx power supply transformer
Please make with current limit
Really enjoy your videos....from South Africa
i was waiting for a project like that
Can't be downloaded