What is Zener Diode ? Zener Diode as a Voltage Regulator Explained (with solved Examples)

Рет қаралды 484,119

Күн бұрын

In this video, the basics of Zener Diode is explained and how the Zener Diode can be used as a voltage regulator in the various circuit is explained (with solved examples).
By watching this video, you will learn the following topics:
0:25 What is Zener Diode
5:40 Zener Diode as a Voltage Regulator
9:08 Example 1
12:17 Zener Diode as a Voltage Regulator with variable load
15:25 Example 2
17:25 Zener Diode as a Voltage Regulator with variable source voltage
20:32 Example 3
23:00 Zener Diode as a Voltage Regulator with variable series resistor
25:39 Example 4
What is Zener Diode:
Unlike the normal diode, the Zener diode is intended to use in the reverse bias condition. (Although it can work in both direction)
When the applied reverse bias voltage is more than the breakdown voltage (Known as the Zener voltage), the diode starts conducting in the reverse direction.
And after this Zener voltage, even if the applied voltage is increased, the voltage across the Zener diode almost remains constant. And that's why it is used as a voltage regulator in many applications.
The Zener diodes with a wide range of Zener voltages (2V to 200V, or even higher) are available commercially.
And by changing the doping concentration, it is possible to change the Zener voltage of the Zener diode.
Conditions to operate the Zener diode in the breakdown region (or as a voltage regulator)
1) The reverse bias voltage should be more than the Zener voltage
2) The Zener current should be between knee current (Izk) and the maximum allowable Zener current (Izm)
Zener diode approximations:
1) Zero Zener Resistance (Zener Resistance is negligible)
Under the breakdown region, the Zener diode can be represented as a voltage source in series with the Zener resistance. And typically this resistance used to be a few Ohms)
But for the analysis, the Zener resistance can be neglected.
2) Zener Knee Current is Zero ( Knee Current is negligible)
To operate the Zener diode in the breakdown region, or as a voltage regulator, the current through the Zener diode should be more than the Knee Current.
But for analysis, it can be assumed that this current is negligible.
Zener Diode as a Voltage Regulator:
In this video, the Zener diode voltage regulator circuit is explained (with examples) considering the different cases.
1) The load resistor is Variable (Source and the current limiting series resistor are fixed)
2) The Source/Supply Voltage is Variable (The load resistor and the current limiting series resistor are fixed)
3) The current limiting series resistor is Variable (Source and the load resistors are fixed)
And the example is solved for each case.
This video will be helpful to all the students of science and engineering in understanding, what is Zener diode and how it can be used as a voltage regulator.
#ZenerDiode
#ZenerDiodeAsVoltageRegulator
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Пікірлер: 187

@ALLABOUTELECTRONICS 5 жыл бұрын

As this video is longer than the usual videos, please use the timestamps for the different topics covered in the video: 0:25 What is Zener Diode 5:40 Zener Diode as a Voltage Regulator 9:08 Example 1 12:17 Zener Diode as a Voltage Regulator with variable load 15:25 Example 2 17:25 Zener Diode as a Voltage Regulator with variable source voltage 20:32 Example 3 23:00 Zener Diode as a Voltage Regulator with variable series resistor 25:39 Example 4

@anuragyadav_8572 5 жыл бұрын

thanks saves time

@thunderguy2766 5 жыл бұрын

ultimate explanations

@lohitlgd8335 5 жыл бұрын

thnx actually for this info

@guardofhonour3089 5 жыл бұрын

you're the boss

@akshaybharadwaj1508 4 жыл бұрын

Can you please send the PDF generated of these ppts also,????? It will help us a lot with the notes in our preparation

@kamleshnehra407 4 жыл бұрын

Finally i found the best lectures for electronics , thanks bro/sir

@scarockdanish8479 2 жыл бұрын

Hlo bro

@kamleshnehra407 2 жыл бұрын

@@scarockdanish8479 hi

@scarockdanish8479 2 жыл бұрын

Bro apna bi electronics rakhi h kya

@kamleshnehra407 2 жыл бұрын

@@scarockdanish8479 nhi , MSc kr rakhi h physics se maine

@scarockdanish8479 2 жыл бұрын

Bhai plse muje apna Instagram account btao

@gangishettyvijay6969 9 ай бұрын

what i could simply say sitting in my home is 'THANK YOU BROTHER' for this awesome video. I have understood it very clear. Once again thanks a lot.

@noweare1 5 жыл бұрын

Very complete and easy to understand tutorial on zener diodes but how to design with them. Thank you.

@vaikh8450 5 жыл бұрын

My concept is totally mess up before but after watching this it is crystal clear. Sir you make the topic a piece of cake . Thanks for your priceless efforts .

@husainshamsu5314 5 жыл бұрын

A video that completely covers the topic.A great channel.clear videos diagrams..exceptional.

@frankreiserm.s.8039 3 жыл бұрын

check out the video about the zener diode on EEVblog on KZfaq.

@jeyarajkichu15722 4 жыл бұрын

Best and usefull channel that i found today since i started using KZfaq. Great Job bro💪👌👌

@sleepdeprived6586 7 ай бұрын

Thank you dude for such an informative and helpful video it took me 2 hours to complete this video (by pausing and noting down the imp points) but i understood everything about zener diode. ❤

@satisharadhya1425 4 жыл бұрын

I was really looking forward for this video to understand the concept of Zener Diode working as Voltage Regulator. Really appreciate the way you explain by giving examples and in simple words, which makes everyone to understand in better way. Kudos to you sir!!!! Please teach us about Flyback Diode/Damping diode in your upcoming videos. Eagerly waiting for it. Thank you

@bevfabrigas1081 4 жыл бұрын

Thank you, I passed my exam because of your great help! May I ask what software are you using to create a video and writting on the screen itself? Thanks

@Official-tk3nc 4 жыл бұрын

Sir i am from NIT jalandhar and you are teaching better than my professors who have 30 years experience

@k.gambit5996 4 жыл бұрын

@ashok choudhary..electrical mai hi hoga

@Maybe.019 2 жыл бұрын

thank you so much , i really appreciate your work sir , thanks again for keeping it free for all

@VersatileAnthem 4 жыл бұрын

great explanation .you made all of the concepts clear !!!!

@satvikchauhan85 Жыл бұрын

really amazing content, especially the questions you solve clear the concepts very nicely

@Sekhar_Home 4 жыл бұрын

Clear all the doubts.. thank you

@mr.tesla2837 Жыл бұрын

Nice presentation man. You deserve salary, not univercity lecturers. At least im my country.

@Mdharun-pv8ds 2 ай бұрын

tomorrow (today) is my class test and I am watching this video at 2:06 AM...thanks for saving me from getting a backlog on eee course

@doddilovakumari4722 4 жыл бұрын

Never forget ur help sir... Tq

@jatinjain850 4 жыл бұрын

Very nice video , it helped me a lot . THANK you 👍👌

@dipikatandel9540 3 жыл бұрын

It is very very good video for zener diodes thank you sir.

@zuhairalsaffar7001 3 жыл бұрын

Thank you so much for your help ❤ 🙏

@Nick-xl1tg 2 жыл бұрын

thank you.. great video ! solved my hour of frustration in 5 minutes

@funny11347 2 жыл бұрын

Hmm bro

@nandakishore9579 2 жыл бұрын

Best explanation bro I prefer you more than my professor

@mostafezurrahman8476 3 жыл бұрын

Thanks, I am greatly benefitted.

@bachelorlife123 4 жыл бұрын

Single video lot of content great

@JaikishanJaikumar 4 жыл бұрын

Only two words Best teacher

@jayasharma7713 4 жыл бұрын

Your explanation way is good..

@b.aishpatil 3 жыл бұрын

Thank you so much sir❤️

@alliajagbe3853 Жыл бұрын

this was really helpful

@moments_unforgettable_earth Жыл бұрын

Thanks a lot for your valuable video..

@sandip_kanzariya8476 2 жыл бұрын

Thanks for amazing explaintion .....👌👌👌👌👌

@tholleakhena8619 6 ай бұрын

Thanks for saving my grade point

@atexnik 2 жыл бұрын

In Russian literature this is called Parametric Voltage Stabilizer, the other type is called Compensating Voltage stabilizer, which uses a feedback from output to compare it with reference voltage to make the necessary adjustment.

@shivamarora9621 2 жыл бұрын

to kya kare?

@vedanttamboli Жыл бұрын

Next week is my jee mains paper, i was so confused on this topic, everything clear, 🙂🙂👍👍👍👍👍thanks.

@normalstranger6482 11 ай бұрын

Bhai clear ho gya?

@vedanttamboli 11 ай бұрын

@@normalstranger6482 hna bhai, hogaya

@ChemKirti 2 жыл бұрын

Thank you so much for this vedio...

@kamrulhasanshuvo9062 4 жыл бұрын

Very helpful video indeed. I have a question - from where the equation of Rs(max) came?

@ALLABOUTELECTRONICS 4 жыл бұрын

At 23:59, the two terms are equated and the equation is simplified for Rs. During this derivation, it has been assumed that the Zener Knee Current is Zero. That means just voltage across the Zener diode should remain at least Vz to operate it in the breakdown region.

@sampleproduct3522 2 жыл бұрын

Bhai Bhai sabse best vidio ye tha❤

@krutikanaka3663 4 жыл бұрын

Good. Video. For diploma studies

@thirutg9936 2 жыл бұрын

Really Superb Sir

@airdhe8005 Жыл бұрын

the best explanation

@mohanmanikanth8687 2 жыл бұрын

How do I find Vout for the examples which u solved It was really great explanation

@ee22anilkumar76 Жыл бұрын

Thanks you very much sir ji

@queencyfernandes6369 3 жыл бұрын

how does the dynamic impedance vary with zener current?

@prasanthkumar9699 4 жыл бұрын

nice explaination sir

@sunildesai5531 Жыл бұрын

Nicely explained

@chiranjibimahapatra708 3 жыл бұрын

U did it man!!! 😘😘😘

@manjithamarasinghe7118 3 жыл бұрын

This video is great

@saiteja.s 5 жыл бұрын

Helpful

@raulboja8679 3 жыл бұрын

can i use this in motorcycle as voltage regular

@neerajhebbar7313 2 жыл бұрын

Great Sur

@charansai3457 4 жыл бұрын

Thanks sir...

@ahmadzia7528 4 жыл бұрын

thums up for yuh guys !

@shashanks7346 2 жыл бұрын

Can somebody let me know how he solves using thevinens equivalence in the questions

@atanudey6507 4 жыл бұрын

Thank u so much

@mohitkwatra9587 3 жыл бұрын

But why can't the current Inc from its rated value in zener diode..... As we saw from graph that Iz can be too much at that almost same voltage....

@shahrukhkhanshahrukh3504 3 жыл бұрын

Sir g agr him ziyada doping krte hain to ziyada electrons p type mein ayeen ge jis se ziyada ions pida hoon ge jis se K potential barrier bar jaye ga.ab swal ye Paida hota hai k phir silicon ka potential barrier q constan rehta hai

@asadulhuq 4 жыл бұрын

Excellent!

@adityakashyap2237 Жыл бұрын

Very Nice explanation of Zener Diode topic. Please explain me about differential amplifier also

@ALLABOUTELECTRONICS Жыл бұрын

It has been already covered on the channel. Please check the channel page. In case, if you don’t get it then let me know, will send you a link.

@adityakashyap2237 Жыл бұрын

Ok Sir

@dhirajkumarsahu999 5 жыл бұрын

thanks a lot for this...but I got a doubt, after the zener breakdown occurs, the voltage across it remains constant, but the current through it increases exponentially with the applied voltage. Can we say that after the breakdown the resistance of it will decrease exponentially?

@ALLABOUTELECTRONICS 5 жыл бұрын

Yes.

@dhirajkumarsahu999 5 жыл бұрын

@@ALLABOUTELECTRONICS thank you so much !!!

@moumitade6265 3 жыл бұрын

Excellent 😀😀

@sathvikambati3464 2 жыл бұрын

Thank you Sir

@satviksharma1146 5 жыл бұрын

Epic!

@Pariharnawab 5 жыл бұрын

Thanks sir

@believethat6739 4 жыл бұрын

Sir what is the reason of minority carrier in diodes. p-side mn thode se electron or n-side mn thode holes Kese ate h

@ALLABOUTELECTRONICS 4 жыл бұрын

Please check this video, you will get it. kzfaq.info/get/bejne/edBxicmIxJzOpas.html After watching it, if you still have any dount then let me know here.

@deepachauhan9365 3 жыл бұрын

Thanks 😊 sir

@mayurshah9131 5 жыл бұрын

Very good

@arvind3656 3 жыл бұрын

Nice video 👍👍👍👍👍👍

@smerdyakov_11 Жыл бұрын

Thanks a lot

@playerplaying3936 5 жыл бұрын

Thanks

@TakHandler 4 жыл бұрын

Thxx bro

@nirbhaykumarchaubey8777 Жыл бұрын

Sir, please rearrange the videos in the playlist Diode Circuits I think precision diode and peak detector circuit should come after op amp and the playlist would be fine, please take a look at this. 🙏

@ALLABOUTELECTRONICS Жыл бұрын

Yes will do it soon

@sravanisiva8414 3 жыл бұрын

Tq very much 🙏

@omarhosari479 4 жыл бұрын

brilliant

@parth6661 2 жыл бұрын

BEST VIDEO!

@bhaveshaghara750 4 жыл бұрын

Philip trimmer which is work on 1.2 volt and it takes near about 1.4 Amp. Currently it works on battery but i wat to make 1.2 v, 1.4 amp adaptor from mobile charger which is 5 v, 3 amp of capacity. Can u tell me what is the value of input resistance and its wattage, zener diode specs....

@circuitsanalytica4348 3 жыл бұрын

Dear friend, use LM 317, a three terminal variable voltage regulator

@guardofhonour3089 5 жыл бұрын

ex2:expressing with constants

@blakshmipriya2853 3 жыл бұрын

Thankyou sir

@kuldeepnishad2194 3 жыл бұрын

Maja aa gaya !

@himanshdaksh1834 2 жыл бұрын

can you provide us notes?

@nathan.m9109 4 жыл бұрын

Sir can u tell me how zener regulates when source voltage increases

@ALLABOUTELECTRONICS 4 жыл бұрын

In case of the Zener diode, in reverse bias, when we increase the voltage beyond Vz (Its Zener Voltage) then it tries to maintains the same voltage across it. But the current through the Zener diode increases. In reality the voltage slightly increases, as we increase the source voltage. And it is also evident from the Zener Curve in the reverse biased condition. But for academic purpose and even in some sort of applications the small increase in the voltage is acceptable and can be assumed as if the voltage across it remains constant. But at the same current through the diode increase. Because of that, the power dissipation across the diode increases. And if it goes beyond the rated value, it can damage the diode. So, when the source voltage increases, then one needs to ensure that the current through the diode is less than the Iz (max), the maximum allowable Zener Current. I hope it will clear your doubt.

@amberbusra3736 4 жыл бұрын

Sir how written assignment Ques explain how zener diode acts as a voltage regulator

@venkat.sairam 3 жыл бұрын

please provide notes and make an app please.

@rajeevsingh1298 5 жыл бұрын

Upload next video sooooon....

@yys9801 5 жыл бұрын

Hi, I want to ask .can I connect a zenor diod across.a battery.to regulate charging .( Specialy 3.8 volt laptop battery in series .to get 12 volts. 3.8x4 =14.8. I want 12 volt. Thanks a lot .

@ALLABOUTELECTRONICS 5 жыл бұрын

I would suggest you to use a voltage regulator instead of the Zener diode. Of course, you can connect, but the practically, the Zener diode won't give you a constant voltage across it. Instead, you can use a regulator like LM 317.

@yys9801 5 жыл бұрын

@@ALLABOUTELECTRONICS thanks for ur reply.

@yys9801 5 жыл бұрын

To be frank .I want to connect laptop battery in bike (Yamaha rx100). I. Have connected few times works fine few months than battery became open. Presently again connected 4 in seris in to 3 line's .in gap of few day I take reading now crossed 17 volts .means it will not last..that's why I asked for diod

@rajakaintura5709 4 жыл бұрын

I have made n side up And p side down But rest of diagram is right In zener diode How much I will get out of three?

@prabesh5339 3 жыл бұрын

Wheather any capacitor is required after zenner or not ? If yes then why and calculating the value , if not then why ?

@ALLABOUTELECTRONICS 3 жыл бұрын

No, as you can see, directly a load is connected after zener. Actually, after the rectification,the filtered output can be connected to zener diode. Considering ideal zener diode, it elemimates the ripple in the filtered output and output voltage across it remains the same. I hope, it will clear your doubt.

@prabesh5339 3 жыл бұрын

Thank you sir .

@guardofhonour3089 5 жыл бұрын

Vi,Rs also can vary

@knowledgeKorner474 Жыл бұрын

Very very Thanks sir finally I got the best video of electronic ☺️☺️☺️☺️☺️ I am Ravi

@landonjackson284 2 жыл бұрын

The way he ends the sentences is killing me.

@mr.tesla2837 Жыл бұрын

I have a question: What shall I do if I don't know load resistance?

@ALLABOUTELECTRONICS Жыл бұрын

Just assume some value of load resistance, which you supposed to be using. And accordingly you can select other values. With that design, you can mention that, it will work for load upto let's say 1kΩ.

@purpiedurpie 3 жыл бұрын

best vedio in utub

@purpiedurpie 3 жыл бұрын

pls reply @ALL ABOUT ELECTRONISCS

@juanalvares11 5 жыл бұрын

very wasy to understand ,

@wildpuyito 4 жыл бұрын

what happen if Vth is less than the zener voltage?

@ALLABOUTELECTRONICS 4 жыл бұрын

If Vth is less than Zener Voltage, then the Zener Diode will act as an open circuit. And Vo = Vin.

@googlearthtest12 Жыл бұрын

I think Vin would be equal to Vs + VL (where VL = Vo). Vin = Vs + Vo. Please confirm.

@googlearthtest12 Жыл бұрын

1. What would happen (w.r.t Example 1) if we select RL less than its minimum value. Let's say we connect RL with value of 50 ohm [but RL(min) is 125ohm] , what would happen to Vz/VL? Will it remain 5V or drop? 2. What would happen (w.r.t Example 1) if we use 5v zener diode and put 3v LED as RL in the circuit?? What would now be the voltage across zener diode / load (Vz/VL) ?

@adibmd.ridwan 4 жыл бұрын

Sir , if Iz is greater than Iz(max), then what happen?

@ALLABOUTELECTRONICS 4 жыл бұрын

It can damage the Zener diode.

@madagalarajasekhsar3739 4 жыл бұрын

power dissipated by the zener diode is very high and the diode may get destroyed

@circuitsanalytica4348 3 жыл бұрын

If Iz is greater than rated maximum, power dissipated as heat will damage the PN junction permanently....

@frankreiserm.s.8039 3 жыл бұрын

How can Is(max) be above Izm?

@ALLABOUTELECTRONICS 3 жыл бұрын

Is is the supply current. It will always be more than Iz. Since, Is= Iz+ IL. Therefore Is(max) can be more than Iz (max). I hope it will clear your doubt.

@gamar1226 3 жыл бұрын

Hello, what is the purpose of the load resistor?

@gamar1226 3 жыл бұрын

Is it to ensure that the Zener Diode works properly?I mean its purpose would be to make this voltage regulator work?

@ALLABOUTELECTRONICS 3 жыл бұрын

Typically the load resistor is the load across which we require a constant voltage. It could be the input of some circuit or input stage of bigger circuit. During the analysis, it can be represented as the input impedance of that circuit. But here for simplicity, it is represented simply as load resistor. I hope it will clear your doubt.

@gamar1226 3 жыл бұрын

@@ALLABOUTELECTRONICS it does, thank you!

@josephmichaelm8139 4 жыл бұрын

Why we cant use the pn junction diode as voltage regulator.... 🤔🤔

@keviseiralu4536 3 жыл бұрын

I think it's because normal PN junction diodes will get damaged when operated in the breakdown region. Zener diodes are spicial diodes which are designed to operate in their breakdown region. Looking up the two types of breakdowns, i.e. Avalanche breakdown and Zener breakdown may help you grasp a further understanding as to what makes Zener diodes special. Good luck mate.

@josephmichaelm8139 3 жыл бұрын

@@keviseiralu4536 Thank you :)