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- Опубликовано: 21 окт 2024
- in this video i explained & demonstrated how you can modify SMPS Laptop, printer charger adapter or any smps power supply which is using TL431 adjustable voltage reference to take adjustable output from any Switch mode power supply. the voltage level can be adjusted by adding a potentiometer variable resistor and changing output capacitor
how to increase output voltage and current of charger, SMPS, power supply. but due to power rating issue we cannot increase its output current. because the power handling capability of ferrite core of high frequency transformer, as the primary and secondary winding wires which are pre-calculated cannot handle more current so that the output current will decrease proportional to the increase in the output voltage level,
![[390] How To Modify Switch Mode Power Supply (SMPS) Increase / Decrease / Adjust Output of SMPS](http://i.ytimg.com/vi/weNKkUA0xkg/mqdefault.jpg)
![Gunna - HIM ALL ALONG [Official Visualizer]](http://i.ytimg.com/vi/HiCxoDeo0hc/mqdefault.jpg)
Great video sir. No one explain things like you do. Very useful information. Thanks.
Very clearly explained!
I have now watched 6 or 7 videos by others, all of them with visual accompanied by horrible muzak only and no explanation but a very few fleeting captions.
I was about to give up - then you came along. Much appreciated.
best regards and special thanks ❤️
exactly, no information on an information video, and why are they always at the top of the lists?
@@stephenhanson3309 Yeah... I guess this (YT) _IS_ at the end of the day, mostly private citizens doing what they can to inform, often without any experience in teaching.
I firmly believe that IF you have any kind of a gift for teaching, you can clearly teach anything that you can actually do... but there are too many putting up videos that _THEY_ understand... but are totally ignorant of how it looks and sounds to the learner.
It is VERY annoying, when we watchers have arrived precisely because we want to learn something... only to be confronted with a low-res, garbled, illogical (and often spoken in a thick accent) account... which at best can be consigned to the "interesting, but HTAF did he DO that" category.
My vote is DO NOT POST... until you can give a clear account of what you are doing, without apologies or obfuscation.
This bloke is better than most, hence my encouragement.
Penjelasan tentang Smps
sangat bermanfaat brother
semoga makin sukses buat channelnya
Im new to your channel and so far i learned from your videos ,the basic foundation help to easily understand what you want to imply, thank you sir for this video 🙂
best regards and most welcome
SAME WITH ME
SALAM FROM INDONESIA
Wow your teaching is very well dost I'm first time watching this type video
Thanks and welcome
Lk
Very informative vdo
Very useful for all technical students
Nice upload my best friend
5 lk bhai very good information thanks for sharing 🙏🏻🙏🏻
Very NICE video ! Always learning from you. I am a Master Business teacher and i say that tou have very good pedagogical skills. God keep you safe.
If you increase the output voltage I advise you check the output capacitors (as you mentioned) and rectifier diodes can handle the increase. Great video 👍😎 also some power supplies have over/under voltage protection usually a dedicated supervisor ic or a comparator which must be addressed..
This is a great and informative video.
Lots of blessings from England 🇬🇧
Lk 65 bro amazing dear always come with best work👍✌
Great instruction! Thank you!
Hi from Vietnam!
most welcome
21 suprb popular channel
good job brother 🙋
Mind blowing way of teaching and this shows how intelligent you are.Sir next video on inverter module of welder machine is expected please.
14lk..MashaAllah very good info sharing👍
Stay blessd stay cnnctd🤝👍💖
Lk33 woe thats awesome informative excellent video big thumbs from me thanks for sharing stay blessed with good health & great happiness/safety take care have a nice day thanks
Thank you, Haseeb! You are an excellent teacher! Three questions... 1) Assuming the power supply is capable of the output... Is the new, maximum output voltage a linear function of the original SMD resistor value? That is to ask, if the original output of the power supply was 16 volts, using a 10K SMD resistor, will the maximum output voltage increase to 32 volts, if a 20K potentiometer is used? 2) I take it that is always acceptable to start with a power supply which has a higher output and only adjust it negatively... That is, to only decrease the output voltage... Many laptop power supplies are 19 volts. Many circuits run on less than 19 volts... 5 volts, 3.3 volts, etc. So, a DIY variable supply from 0 to 19 volts would be very useful. Correct? 3) How clean is the new ouput? That is to ask, will it drive digital circuits well?
Hi, Haseeb. Some time has passed and I have learned some things. In answer to my own question regarding using a potentiometer to make a variable power supply, I have written some notes...
Laptop Brick to Variable PSU Conversion
These conversions are based on finding the TL431 voltage reference and replacing the primary resistor on its voltage setting resistor divider with a potentiometer. The maximum output voltage of the device is reached, when the output chopper transformer begins to sing. This is determined through experimentation. However, a reasonable estimate of the needed potentiometer value to reach a desired maximum voltage might be a linear multiple of the value of the primary resistor on its voltage setting resistor divider.
Example:
Given that
1) the original output voltage of the device is 19V,
2) the voltage setting resistor divider for the TL431 consists of say R1 = 10K and R2 = 750R,
3) the output chopper transformer does not sing at the desired new maximum voltage output and
4) the voltage rating of the original output cap(s) is 25V...
For a desired new output maximum voltage of 30V...
19 Volts/10K Ohms x 30 Volts/XK Ohms
19 * X = 10 * 30
19X = 300
X = 300/19
X = 15K789 Ohms (the nearest [lower] potentiometer value is likely 15K) and the voltage rating of the output cap(s) should be raised above 30V, to say 50V, to add some needed headroom.
Caveats
1) The original output caps must be replaced with the same uF, but at the new maximum voltage output rating, plus some headroom. If the bleeder resistor that is connected in parallel to the output capacitor begins to heat up, you will have to increase its wattage, as well.
2) The total output wattage capability of the PSU cannot change. Therefore, as the voltage output capability goes up, the amperage output rating goes down. As a current limiting circuit has not been included in this conversion, the operator of the PSU must manually manage the current draw upon the device. Or, a current limiting circuit could be contrived.
3) Regardless of the desired amount for the new voltage output, the new voltage output should not surpass the point where the output chopper transformer begins to sing.
4) The original R2 of the voltage setting resistor divider for the TL431 should be left in place and its value should not be changed. It sets the lowest voltage level that the device can reach and is rated to maintain the minimum voltage needed to run the device.
*** As always, I do not take any responsibility for any consequences from using any information that I provide. I am not an electrical engineer and my statements could be incorrect. Electricity can hurt you, or even kill you (easily.) Proceed at your own peril. ***
Haseeb, I am very tired; my health robs my sleep. Please proof my notes to make sure that what I said is correct and that I have worded it clearly. I appreciate this help.
Additionally, there is a lot of interest in adding a constant current limiting circuit to these power supplies, when they have been upgraded with a potentiometer to be adjustable. Please design such a circuit for us and show us where to insert it into the original device. I look forward to that video, please and thank you!
Your tutorial video is great Haseeb.
very educational program,
thanks a lot dear
Great presentation like always, in a very detailed manner, shared... Thanks for the wonderful share brother, keep it up.
So nice of you. stay blesed
Assalamu allaikum Bhai Masha Allah 👍👌 zabardast informative vdo h .🌷
Nice demonstration
فيديو وإبهام أزرق كبير وآمل أن تسير عطلة نهاية الأسبوع بشكل جيد
MashaAllah , nice work dear friend
nice job dear bro thanks for sharing
Wow thanks Sir I am plz with what you are doing, you have really helped me know more details about power supply, much love Sir😍😍😍😍🇨🇲🇨🇲🇨🇲🇨🇲
Lk 105 good job 😊😊👍👍👍
Masha Allah brother, amazing as always. Big Like 👍
Bless
I'm assuming that lowering the voltage is much less risky in terms of damage to components. Please tell me!
you are right, when the voltage are reduced, at that time it is less risky,
@@HaseebElectronics I see, so replacing an existing resistor with a lower resistor will allow more current and lower voltage (because wattage output remains the same). I can calculate this using the ohm's law.
Great way of explaining. Good day brother
This video is very very useful for us thnxx sir g Allah bless u
Thanks and welcome
aap ne mera urdu channel (HASEEB ELECTRONICS URDU) visit kia?
agr nahi to ( *haseeb electronics urdu* ) check kr lein
Sir how can a smps output voltage jump higher then designed value, in a fault condition? Does tl431 take some time to operate or what? Please explain. I have seen your several video and search internet a lot but could not get the answer. Please 🙏 explain
Really useful knowledge.......many thanks!
Maa shaa Allah great 👌
best regards and special thanks
Your really professional brother! Very informative...Salamat
So nice of you.
please accept my best regards
I have a 300w 60v 5 amp PSU that is limited to 5 amp can I remove the limiter to get variable 12v 25 amp /30v 10amp staying within the 300watts
Ma sha Allah good work stay blessed dear brother
Dear sir Like your video. I try to do a laptop charger as variable power supply but when will go less than 13v fluctuation started if you see my message please guide me what is the reason.
Very good upload
Is it possible to change output voltage of laptop battery with putting extra circuitry?
Bahot bahut badiya
Thank you.......... Haseeb....!!!
best regards
Selamun aleyküm. Sometimes, a controller ıc is used instead of tl431.
for example (AP4310). Can you explain this type smps circuit?
very nice demonstration
Aoa, sir my smps 12vdc gave low output only 6vdc. Sir plz tell me which component is faulty so i replace it. I am waiting for your reply. Your videos are really good & informative.
please check RCD snubber circuit,
check TL431 or related circuit
Optocoupler
Great video. Thanks
best regards 💕
Good job well-done sir!
But can the current increase as the voltage remains the same?
@@HaseebElectronics I appreciate your highly informed reply. Thank you Sir.
I most say that you have added to my knowledge bank immensely. I am grateful once again.
Great job my smart friend 😊 give you 👍 qqq
as always good explanation 👌👍 bless you
I did rhe same sa shown vut when voltage reaches 14 volts Power supply shuts down. How to fix it.
might be there is a over voltage protection. you have to find and disable the over voltage protection first
then you can adjust the output
great information
Hi. I have a problem with my smps. I made it regulated, like is shown i Ur video. Increasing Voltage is ok, but if i decrease voltage under 8,5V voltage start fluctuating. Where can be a problem. THX 🙂
Original it is 12V
I like to design to cater for a faulty potentiometer where the slider may lose physical contact with the resistor and create infinite resistance. First, make sure the resistor is in the circuit where a higher resistance results in lower output voltage. This to protect devices on the output from over voltage if the slider loses contact. Second, connect one end of the potentiometer to the slider. This makes sure the maximum resistance cannot pass the potentiometer value, even when the slider loses contact.
great can it also use to charge you mobile phone
yes dear
if we adjust at charging threshold, it can be used
@@HaseebElectronics thanks a lot i tried and it works, and it even charge my phone faster than before
Thank you sir good video this video is interesting
1st... Thank you so much.. Sir...i learned lots of useful thnigh form this channel...
Sir i Have a requst... Sir i have same power supply 16v and 32v dc output if that possible can make 1 one video how to fix that dual output charger... Suddenly my charger stop working.. I checked sir no burn components.... Just no out on cold side..pls help sir.....thank you
I am facing problem of current in my smps. I changed same resistor connected to Tl431 in my circuit. Output voltage increased from 12v to 14V, just as I calculated, but maximum output current also increased. This is causing overheating. Please tell how current can be reduced or limited to safe value.
i think the bleeder resistor is heating up. that is connected in parallel t the output capacitor
you have to increase its value as well with considering wattage
@@HaseebElectronics Thanks for replying. Where is bleeder resistor?
bhai sahab computer smps se 12 volt 15 amperes kaise le skte hain. Abhi 8 ampere mil rahe hain, mujhe car amplifier gharpe chalaane ke liye 12 v 15 ampere chahiye.pls help
Assalamualaikum flend tank you
wa alaikum salaam brother
283 How to Increase Output of any SMPS charger or Adapter
How Can you remove the short circuit protection circuit
Thanks.
J
Do you have a Rumble channel??
please define the term "RUMBLE CHANNEL"
because I am weak in english vocabulary, please
@@HaseebElectronics There is a new Video Platform to Post video's and monetize.. It is called Rumble.com
If the resistance in the tl431 reference pin to + the voltage will go high or low?
Salam 3alaikom
Is there any inconvinient if i decrease voltege at the lowest value i need less than 1 volt with enough current ?
Thanks
Nice information 👍👍
How could the undervoltage lockout be prevented?
Thanks
thanks a lot sir
Wish You Good Luck
Very knowlgdeable
it is my pleasure
Can you please show how to limit the output current of any PSU to let say 1amp, and better if we can adjust it, keeping the voltage the same. Thank you
@@HaseebElectronics the current regulator you mention is easy to build ? Or better to buy it ?
I need to charge a 12v battery at 0.8A but i don 't know how to limit the amps but keeping voltage at 13.8v. Thanks.
perfect sir thank you..
Most welcome
best regards dear
Hello teacher God bless you.
Thank you very much for all your informative and useful videos. Your reward is with God and the Ahlul Bayt of His Holy Prophet (PBUH).
The truth is, I wanted to say that why "Persian" language is not available in changing the language or translating the subtitles of the all videos and only in a very limited way, maybe there will be a video that has "Persian" among other languages...!! ???
i have a adaptor with multiple voltage options but it has overvolt protection is there a way to bypass it?
if that over voltage protection and it is coupled via optocoupler, you can disable it from this optocoupler
@@HaseebElectronicsi did it and it works thanks alot my friend!
Sir How to increase ampere (current) ?
I have 12 v adapter and I need it to produce 27 v is it possible using this formula?
to increase voltage from 12 to 27, it will very difficult. and the regulation feature may not be achieved,
you can disassemble transformer and increase output winding turns.
please check video number 390
Hello sir , very informative video as always..
Kindly suggest , can we use SG6558 IN PLACE OF SH6848, awaiting ur valuable response,thanks🙏
Sorry it's SG6858 IN PLACE OF SG6848..
24v 2.5a SMPS me 30 to 46v dhikare. Naya Optocoupler 817, tr BYQ28e 200,Mosfet 5L0380 naya try kiya.fir bhi same problem.Saath me1000uf 25v output dhonom capacitor jaldi heat hore.LED jalre.output terminal offline me 422 dhikare.output capacitor nikalke check kiya thab 000 dhikare.
Same company ka naya circuit board dheke component value &direction check kiya.abhi 80percent naya component badhla.voltage unstable increase dhikare.Sir,please help.
What is the solution for under voltage lock out. Please tell me i need help.
if it touching to lower limit
then
locate vcc pin and a resistance in series with rectifier diode at auxiliary winding
if there is a resistance, remove it
it will allow to give more lower level threshold
Best regards to you
42 great uploading thxx for sharing
I wanna raise the volts with out drawback
Sir how to select components for the project??
Like 33 walkum aslam mashaAllah
Dats good
Nice working
Mera charger khod bakhud on off hota hay ac connection dene k bad. 12 v vharger hay 3d sign board ka. Led jo lagi hay wo b bar bar on or off hoti hay. Randomly koi specific time k lye. Ye kis chez ka masla ho sakta hay bhai
is ke secondary section me koi component problem he. may be some capacitor rectifier
feedback circuit check kr lein
vcc capacitor check kr lein
main dc capacitor ko check kr lein
Ok g jazakallah. Thanks for the quick response
Dear sir,today I try to reduce voltage of laptop charger original voltage 19.5 v to 5 volt. So I dis connect original résister 27k & connect 10 k preset. After that I adjusted preset voltage is become low but fluctuating 4volt to 5.5 volt. After that I connected original resister again. Checked voltage it’s 19.5 no any fluctuations.after that I connect 10 k resistor voltage drop to nearly 8 volt but fluctuating 7 volt to 8 .7 volt. I’m connect 10 ohms 5 watt resister voltage drop to to 1 volt and fluctuating 1 to 0 volt resister heating very low.Sir please advise to me what I have to do for got 5 volt.my charger is Sony VGP ac19v26 . 19.5v 4.7amps.please help me sir.im appreciate sir
Thank u for sharing
excellent!
i have 12v adapter.Trying to decrease the output voltage to 5v by changing the resistors like you show but the output does not decrease under 8V.It is last value at minimum.I did it by potentiometer the case did not change.8V.What can be the problem?
Hi friend. Excellent Video Support👀👍👫💯🔔🙌+ 50
Thanks Sir
Your from which country
i am from Pakistan but now in Jordan
@@HaseebElectronics Great bro
Hello, I have a computer charger that does not charge the battery, but when I turn it on the computer becomes very heavy and when most of the things that I connect to the laptop, such as a mouse, it turns on and off, and as soon as I turn on the device, the charger makes a sound inside the charger case. Please help I need it at university
Hindi/Urdu plzz
urdu nahi bolsakte te
Ji bhai Urdu bool sakta hoon aur bolta bhi hoon
aap meri video urdu me dekhney keliey mere urdu channel (haseeb electronics urdu) ko dekhein. wahaan ye sab videos urdu me hein
جی پیارے بھاءی میں اردو میں ویڈیوز اپنے اردو چینل (حسیب الیکٹرونکس اردو) پر اپ لوڈ کرتا ہوں۔ وہاں ساری یہ ساری ویڈیوز اردو زبان میں ہوتی ہیں۔ جو کہ صرف میں اپنے پاکستانی اور انڈین دوستوں کے لءے بناتا ہوں۔
Thanks
best regards