Mosfet powerful voltage regulator | IRFZ44 mosfet
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- Опубліковано 15 чер 2019
- Hello friends, today in this video i have shown how to make a simple voltage regulator using a irfz44 mosfet. But remember to install good heat-sink for the mosfet.
Li-ion charger circuit using 1 transistor
• Simple li-ion 18650 ba...
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Li-ion charger circuit using 1 transistor
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This deceptively simple circuit is extremely elegant for many reasons. The mosfet is being inserted in series with the positive lead. Then the pot. serves as a voltage divider
to pick off the desired gate voltage. So the mosfet is only turned on enough to create the required voltage drop to obtain whatever output voltage is desired. Since a mosfet
requires virtually almost zero gate current, a very high resistance pot. can be used. Also, if you want to use a higher input voltage, just use a mosfet that can stand more voltage.
I wanted to go from 48 volts down to around 14 volts to operate a 7809 regulator. I had an IRF 830 mosfet kicking around in the junkpile. It can do 500 volts at 4.5 amps.
I set up my experiment using a 1 megohm pot. Works perfectly! Once you find out the values of the divider, then you can substitute in fixed resistors instead of the pot.
In my case I ended up with 470k from +48v to the mosfet gate, and from there the other leg of the divider is 270k to minus side of 48 volt supply. 1/4 watt resistors are fine
because the power dissipated is only a few microwatts. Those values yield an output voltage of 14.2 volts. That output sags very little under load too.
This circuit works great for knocking down 48 volts to 14 volts to serve as the input for the 7809 regulator. 7809 regulator can only stand 35 volts max on its input.
This circuit is very useful because it is so simple and yet so elegant. Mosfets need nearly zero gate current. Also at first glance this circuit looks as if it may need
some amount of output load resistance to make the gate positive with respect to the source. But to my utter surprise, it does not need that. The open source lead
has the 14 volts on it with no load resistance. That was a very pleasant surprise which still doesn't make too much sense, but seeing is believing.
This circuit is quite stable under load. Much more stable than I would have thought. Thanks for posting this! It makes possible taking 48 volts and getting 9 volts regulated
using only 4 parts! The 14 volts from the mosfet is the unregulated input to the 7809 9 volt regulator. Then that regulator holds 9 volts rock steady up to a 1 amp. load.
At that full 9 volt current, the mosfet voltage sags only down to 11.8 volts or so. Quite amazing.
I assume you could tweak this with a zener diode instead of a resistor on the low side of the divider, to add tolerance to input voltage fluctuations.
@@Tim_Small Great idea! Yes, indeed. Try it.
Then what should be the potentiometer value for 48v regulator ?
A 1 megohm pot can be used then just pick off what is needed to get the voltage desired. @@AdamTheBot
The IRFZ44 is not intended to be used in linear mode like this! It is designed for switching applications where it is hard on or hard off. Your application could result in excessive power dissipation an destroy the Mosfet.
I found out that using the irfz44n is really good and it never breaks. I used the lm317 before and it died after charging one capacitor lol
This is for experimentation only. Its a voltage regulator
but current is only some mA.Tested with z44,1404
and both burned when load current is above 1A
I havent tried it yet but it seems to be Super
Thanks a lot
This is not a voltage regulator and the whole thing will burn if you try to load it and you can't get stable voltage out of it anyway.
If you want to make a linear voltage regulator you could just use lm317t which is less expensive than a mosfet and is actually a regulator
An LM317 would have to be paired with a PNP bipolar junction transistor to handle the current and wattage that the MOSFET can. It would be more expensive, but, it would indeed be a true variable regulated power supply. No matter what, a large heat sink, or a small one with a cooling fan is necessary, if you want to pass several amps with a big difference in voltage between the source and the output voltage. An LM317 only handles about an amp or so, where the IRF44 can handle 10 amps or more, as long as it doesn't dissipate more than 94 watts.
@@vincentrobinette1507 it's meaningless to use a mosfet anyway and the mosfet and lm317t both will handle pretty much the same current since their power dissipation is mostly limited by to-220 case which they both have the same.
But at least lm317t will keep the same voltage with various loads and is also cheaper and original lm317t ic is nearly impossible to burn, even when it gets too hot it just limits the current and nothing really happens to it while mosfets are quite easy to break especially if the temprerature is high
@@id15807936 Agreed. If you need a regulated output higher than 1 amp, the LM317 can be paired with a TIP42 or MJE2955 PNP bipolar transistor, for the same dissipation as the IRFZ44, and that would also give you a true variable regulated power supply.
@@vincentrobinette1507 can you explain the circtry briefly with pin connection or can give a link for similar
Various load will change the output voltage in case of mosfet .
Thank you so much. Works well with a heat sink. 👍
Nice idea 💡
Thank you 🙏
Nice hands free clamp.
Good, a large heatsink is must
Works good
Consigo regular uma.carga para caregar uma bateria de 7 anperes em 14v retificado
SUPER CON ESTE VIDEO ME DIO LA IDEA PARA HACER UNO FIJO DE 12 v A 5V
Works great with a 12v pc cooler fan! Thanks!
Olá qual mosfet eu utilizo para 12 volte
Inventor please can you add AMPERE Adjustment in. Do a video of that, i can't wait . .. ;-)
Yes
how about 36volts motor 105 ampers
Yes
Si funciona.. pero solo sirve para alimentar cosas simples, ya q el amperaje que entrega es muy poco . Unos 800 mA
Super! Senk you!
Bravo 👏 very good job 👏
Disculpe cuantos amperios soporta esta fuente reguladora
Amazing 👌👌
this circuit is working but when i fix output voltage then input voltage increase i must going to fix again output voltage so is there anywhere to fix output with zenner diode ? for example input can be variable between 0 to 50v but output always fixed 12volts ?
guys i recommend add 220 ohms resisistor :) thanks bro it's working
Thank you so much vaijan....
Em qual placa de reçiclage consigo esse transistor?
Сильно греется транзистор под нагрузкой?
THANKS APPRECIATE your cooperation for undertand electronic matter
A good heat sink is a good idea if it is to drive a heavy load. The amperage X the voltage across the drain/source junction will tell how many watts the transistor will dissipate. The regulation isn't very tight, because as the supply voltage drops, the output of the 'regulator' will drop by the same percentage. There's also some voltage drop due to the gain of the transistor.
I built the circuit with a heat sink. There is high output of heat and voltage fluctuates greatly over time and changes with load. Only good for short period of use.
@@cipstechitips1574 This is still ideal, as a "quick and dirty" regulator, for a quick test. I do this often, to see of a 12 volt gadget is working or not, considering that you have a tolerance of 11.5 v to 16 volts, for most devices that plug into a "cigarette lighter socket.
This primitive circuit is rather an electronic load for testing power supplies or bstteries than a voltage regulator.
Regulators need a feedback loop in order to keep the output voltage stable, independent of either line or load variations. This is missing here.
Even the electronic loads need that feedback loop in order to draw stable current from (say) a battery under test, while its voltage drops under the discharging process.
No feedback, no regulator. Just primitive voltage adjust circuit...
Wich project you suggest for Led dimmer input 4V?
@@MACYNET323I have nothing specific about your request but you can find and use various circuits here in Y.T, using either the classic LM 317, or even better a step down dc/dc converter (which you can buy ready made, as they are very cheap)...
@@user-pz6cx8zf2y
For step down modules problem is the V.drop at low tension like 4V battery.
I thinked at lm317 but can handle limited power.
Can I use mosfet likeTIP41 or IRLZ44N that operate at low voltages and can hold more power? Thx
@@MACYNET323 Then you can build this circuit. For a dimmer, it makes no difference if the voltage is stabilized. It is not critical. Otherwise you should check links about "constant current generators" or "electronic load" circuits and pick the one that fits your need. Why you insist on 4V input? Don't you have another choice about the voltage input? (Say, a 12V input). How much power do you want to control with 4V input? (How many amperes)?
@@user-pz6cx8zf2y Because is single Led (Nichia 519A) and input is 3.7V lithium battery. I want drive it up 3A and dim. with knob untill 1 mA. I prefer CC than pwm mode. Cheers
Merci .thanks
Is it recommended to install capacity in it? And what is the maximum voltage input that the regulator can support
Download datasheet,it will solve your problem
Muito bom 😉😉😉
Thank you
What kind of soldering iron is that. I’ve never had one that kept the solder inside.
Haha.. No he just added the solder on the tip first and then used only the iron on the terminals. But we know how wrong that is. :) I am actually surprised that he was able to solder that way on un-tinned legs.
Muy bueno el circuito. Que amperaje suministra a la salida.
El q le suministres en la entrada y lo q aguante el mosfet.saludos
Y cuanto puede aguantar ese mosfet
Por lo que tengo entendido entrega todo el amperaje que soporta el transistor cuando usas voltajes bajos, es decir que si tenes una fuente de 12 volt y el transistor soporta 6 amper solo rendirá eso cuando lo regules hasta los 7 volt. Por encima de eso cae a 3 o 2 amper, lo que no se si esto ultimo sube dependiendo del tipo del transistor que uses o sigue limitado en eso.
Very simple
ye kitny ampre ka load utha ly gi
Parabéns pela matéria o melhor vídeo.
Ami IRF540
VR 50k
Diye akta volume requlator banaichi 12 motor control korar jonno... But MOSFET khub e gorom Hoi. 1 min calanur por ar hat laganu jaina ... Emn holo kno plz bolben ...!
Hi can anyone help me. I want to add a 12v rc circuit board to my golf trolley but I'm stuck with the wiring.
Dá para substituir por um controlador de carga de sistema solar?
Wow,good and great idea.
Great job
Thank you
Bhai kya koi bhi transister Le sakte hain
Sir is par DC 24v fan chala sakte hai
Output what amper??
Здравствуйте. Можно ли эту схему подключить после диодного моста?
Thats cool ... how many amps can it handle ?
Can u only get a voltage limit of what you supply it with ?
⁉️I salvage all my electronics and found one of these on a Mixstar DMG Auto Dental Impression mixer…. I don’t have a 20V power supply but close. Will a 19.5V computer charger work? I’ve been trying to make some sort of DC speed controller for a while now. What kind of potentiometer are you using? 4K? 5k? 10k? Thanks. I’m new to electronics. Btw.
Con un d13007k puede funcionar?
merci
Reduced, variable and UNregulated. Output voltage varies according load current.
Cheers from Indonesia
True, but it is tighter than a rheostat would be, and it's much easier to mount the MOSFET on a heat sink, than to find the 94 watt rheostat that would be the alternative. The transistor can be purchased for less than $1.00 US, and the potentiometer for about the same. I use this circuit quite often, when I just need a quick and dirty way to vary the voltage to a device or circuit board, to test the permissible voltage swing.
can you use a tip120?
Bro it was working good. within 15minutes the speed went down and after some minutes it was not working
Is not really a voltage regulator, is just like an high power variable resistor. As the mosfet works like a resistance, higher currents will drop the voltage so is not stable at all. Also at lower voltages and higher currents, the disipated heat will be high and the mosfet can blow up.
If you want a real voltage regulator, take a look to switching IC regulator or buck converters (they has much more stability and also much less losses as heat).
Good point! Buck converter is awesome (in my opinion).
Yeah i used lm2596 with vapacitors and induttance to regulate the voltage BUT there is a negative think : it works with variable frequency using the PWM ( pulse with modulation ) that create problems with stereo hi-fi or rc models
@@maxlmthebest I've not tested hi-fi or rc so I've nothing to say about it, but if you're using a regulator for that pourposes then you'll use a linear regulator or similar with an input voltage near to output voltage to limit the loses. They are much better than just a variable resistor based on mosfet ;)
@@Danixu86 that's sure much better...we are changing simply from analogical to digital tecnology..
Apakah ada sistem short protek....
Berfore I get involved with developement and specs, is it possible with this circuit to adjust from 3 to 120 or 240 volts ac?
No bro, it's not possible
@@TechIdeasAG Can you post a link to schematic that can do that please?
@@evananderson8452 you can implement the circuit you want by using a triac. Just hit in Google "triac mains regulator" and you will find the circuit you want.
Yes do with 240. Put thumb on output and taste negative with your to tongue 😝
It's adjustable, but there is no voltage regulation. 😲
exactly!
Yes, I agree with you and this only works well if Vin is a fixed stable voltage to start with however true voltage regulators are a total pain in the ass.
My problem is trying to find regulators and or circuits online which are immune to drop out, many things I am trying to power need a stable 12 volt supply, I live semi off-grid with a 12volt battery bank, easy you would say, what is your problem? trouble is 12.2 volts is a totally empty battery my system voltage hardly ever dips below 12.6 volts and can be as high as 14.7 volts when on a charge, trying to get something which will take the varying voltage and give out a flat 12 volts is like trying to find a unicorn.
Many Chinese parts which claim to do the job do not match the details given on spec sheets and finding something that will supply about 5 Amps is virtually impossible, they can put men on the moon but this seems too much of a challenge for the semiconductor industry.
And I know about low drop out regulators but they usually only supply a meagre 1 amp.
@@richardsandwell2285 but why would you want stable 12V with big amperage? if you have solar connect old atx power supply directly to your solar panels(yes it will work on DC in ;) and you will have as flat 12V as it gets. but still can not see the point
7812 IC
@@AHC20 and perhaps with darlington current boost considering 7812 only 1.5A
Will the output fluctuate with the fluctuations in input, as in case of solar panel, please reply
Tech ideas can I use a power transistor like 13007 in place of z44
No puedes, ese transistor usa mucha corriente en la base, con esa configuración quemarias el potenciometro
The Beta of the 13007 is too low. The potentiometer could not supply enough current to the base of the transistor without burning up, to get high output current. The regulation would also be poor. This simple idea really is best done with a MOSFET.
Thanks for replay
Yo lo hice con ese transistor y se banco una lampara dicroica de 12volt 50 watts pero calienta el transistor, no se quema el potenciómetro a lo mucho quemaras el transistor
Thanks bro working
Controller first connection last connection change
Porque no pones un sch ?
Creo que es mas didactico.
with your setup...it work only when no load... u need to add 10k resistor between gate and source pin.
In case if I connect 12 v battery then what is the end output ?
3v kayıp ile 9v volt alırsın
Will this drive 24 volts 20 amps, thanks
Tg u for sharing..note
In your case you have rotate the potential meter from 20v to 5 volts is it safe to charge your phone with the output 5v
All that's doing is turning the transistor into a resistor. It might work for 12 volt computer fans (in which case, just use the variable resistor on its own), but it will burn up for if the current draw is too high.
adjustable=yes
regulated=no
why people always say that mosfet can act as regulator? if you want to get regulated output you must have regulated input to the gate pin.
how is better...?
lm 317 / irfz 44....?
Excellent
Regultor ini bisa untuk tegangan simetrik atau ga ?
Nice video, keep it up, thanks :)
Nice bro..
Kya isase Ham 12 volt ka motor Chala sakte hain chalane per IC heat ho rahi hai
Lo ví con un tip41c
That is can used for long time ????
How watts with one good headsink a 18v input 4Amps DC or burn?
The device is rated at 94 watts dissipation. At 4 amps, the difference in voltage can be a maximum of 23.5 volts.(the difference between supply voltage and output voltage) It needs to be on a large heat sink, or have a cooling fan on a smaller heat sink, to handle that much wattage.
@@vincentrobinette1507 Don't forget the liquid nitrogen. In the real world you can't get anywhere near that.
@@opera5714 The only way you can, is if the device is clamped directly to a large heat sink with no insulator. Keep in mind, the pad of the device is the drain, so the whole heat sink would need to be at + supply voltage. Using a screw through the hole in the tab won't give sufficient thermal continuity to allow the small surface area of the TO-220 device to transfer that much heat into the heat sink. I use a clamp, that presses the device body right over the silicon die to hold it against the heat sink. That's the only way I've ever successfully gotten a device to operate at or near the wattage limit.
I build small amplifiers, which use the TDA 2040 amplifier IC, which is a 5-pin TO-220 case style device. The amplifier is stereo, so conveniently, there are 2 devices side-by-side. The mounting screw is right between them, and a flexible "rocker clamp" spans the centers of the bodies of the devices, with the screw holding it down in the middle. It is not a flat bar, but rather a flat nut, which is arched. It is tightened to the point of flexure, so as the devices expand and contract from thermal cycling, and, as the insulators settle in, there is always steady pressure on the device pads, right over the silicon dice. That way, if there's any warpage, it assures the silicon die is in firm contact with the insulator. Ever since I've adopted this mounting method, I have never had a field failure of these amplifiers. These devices are rated for 20 watts of dissipation, but, driving their nominal loads, they rarely exceed 14 watts each.
The devices are internally thermally protected, which causes them to de-rate the current at 127 degrees C. The way I test, is to drive their full rated output, just the verge of clipping into 4 Ohm resistors, and look for the current clip from de-rating. If the heat sink gets above 100 degrees C. without going into thermal limit, the device is mounted properly. With the heat sinks being relatively small, they often reach 115 degrees, before the device self-protects. I cannot achieve that, by mount in the normal manner with shoulder washers, and a screw through the mounting hole. Rocker clamping cut the thermal resistance between the device and the heat sink in half, since the heat sinks are not precision machined.
Так просто?
How much volts drop ? Verify variable voltage with load.
About 5V drops. Look at datasheet gate threshold parameter.
vou usar mosfet maior corrente ligar fonte dc ate 28 volts para sair maximo 12 volts
Is this actually controlling voltage or is it chopping it up and the multimeter is averageing?
It's just like lm317 linear regulator
😍
اكلك خويه اني جربت الطريقه اونجحت لكن المشكله الحراره عاليه احمل عليه باتري ١٢فولت ١٢انبير متتحمل ليش
Brother Shall I use irf630 instead of irfz44 shall I load 12v 775motor
Yes, of course
How much Ampere load it can handle?
Depends on Which mosfet is used
For Example If you use Irf740 it can handle 10 Amp Of Max current But for Safety reasons you should not but More than 5amp Of current
Can I used 12 volt battery to regolet voltege
What's happen if we change the posision positif tobe command and negatif in line input dan output potentio rotate clokwise to increase?
Still don't know the maximum amp output
The IRFZ44 MOSFET can dissipate a maximum of 94 watts. The maximum amperage is calculated by dividing 94 by the difference in voltage between the supply source, and the load voltage. The transistor needs to be mounted on a large heat sink, or a heat sink with a cooling fan. The limiting factors are: The current cannot exceed 40 amps, the voltage difference cannot exceed 50 volts.
hello .. you welded a wire at 0.42 minute is normal wire or a wire acts as a resistance ?. thanks
Just wire
Good 👍
motorcycle me lagane par constant 12 volt milega
bhai bata rahy ho ya poch rahy ho.?
Is the max amperage depending on the input and the max Drain output of 41amp of IRFZ44 Transistor..?
is there any potentiometer/variable resistor can hold a 10amp current.?
Thank you.
The power MOSFET turns the potentiometer into a power resistor. But it needs a big heatsink.
A potentiometer big enough to handle 10 amps is called a Rheostat. They are huge, almost the size of a variac. The output is NOT regulated. The IRFZ44 MOSFET can handle up to 94 watts of dissipation if mounted on a big heat sink. At 10 amps, the maximum difference between the supply voltage and output voltage is 9.4 volts.
It ia not working for me...i dont know why i placed 5v as input and trying to control the brightness of a led diode but the led glows very dim at full pot rotation towards the drain side...i checked the voltage it was 2v at max pot rotate...
Any fix please tell...
Amazing
Bro,if you show the circuit diagram, we will be more benefited
Es normal que pierda 3 voltios?
Si. Todos los reguladores pierden algo de voltaje.
May I charge 6 volt battery
Kitna Ampere load le sakte he
What is the out ampere
Bro can I use this to regulate my diy 24v battery charger to 12v battery charger?
Can I use a540 instead 44N