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

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
Follow me on KZbin:
/ allaboutelectronics
Follow me on Facebook:
/ allaboutelecronics
Follow me on Instagram:
/ all_about.electronics
Music Credit:
www.bensound.com/

[@ALLABOUTELECTRONICS]

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]

thanks saves time

[@thunderguy2766]

ultimate explanations

[@lohitlgd8335]

thnx actually for this info

[@guardofhonour3089]

you're the boss

[@akshaybharadwaj1508]

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

[@gangishettyvijay6969]

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.

[@kamleshnehra407]

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

[@scarockdanish8479]

Hlo bro

[@kamleshnehra407]

@@scarockdanish8479 hi

[@scarockdanish8479]

Bro apna bi electronics rakhi h kya

[@kamleshnehra407]

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

[@scarockdanish8479]

Bhai plse muje apna Instagram account btao

[@vaikh8450]

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 .

[@Official-tk3nc]

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

[@k.gambit5996]

@ashok choudhary..electrical mai hi hoga

[@noweare1]

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

[@mr.tesla2837]

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

[@satisharadhya1425]

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

[@Mdharun-pv8ds]

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

[@husainshamsu5314]

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

[@frankreiserm.s.8039]

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

[@JaikishanJaikumar]

Only two words Best teacher

[@jeyarajkichu15722]

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

[@doddilovakumari4722]

Never forget ur help sir... Tq

[@bevfabrigas1081]

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

[@nandakishore9579]

Best explanation bro I prefer you more than my professor

[@vedanttamboli]

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

[@normalstranger6482]

Bhai clear ho gya?

[@vedanttamboli]

@@normalstranger6482 hna bhai, hogaya

[@bachelorlife123]

Single video lot of content great

[@sleepdeprived6586]

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. ❤

[@tholleakhena8619]

Thanks for saving my grade point

[@VersatileAnthem]

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

[@zuhairalsaffar7001]

Thank you so much for your help ❤ 🙏

[@alliajagbe3853]

this was really helpful

[@dipikatandel9540]

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

[@Nick-xl1tg]

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

[@funny11347]

Hmm bro

[@Sekhar_Home]

Clear all the doubts.. thank you

[@sampleproduct3522]

Bhai Bhai sabse best vidio ye tha❤

[@jatinjain850]

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

[@krutikanaka3663]

Good. Video. For diploma studies

[@b.aishpatil]

Thank you so much sir❤️

[@mostafezurrahman8476]

Thanks, I am greatly benefitted.

[@Maybe.019]

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

[@knowledgeKorner474]

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

[@jayasharma7713]

Your explanation way is good..

[@thirutg9936]

Really Superb Sir

[@satvikchauhan85]

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

[@kamrulhasanshuvo9062]

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

[@ALLABOUTELECTRONICS]

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.

[@neerajhebbar7313]

Great Sur

[@manjithamarasinghe7118]

This video is great

[@chiranjibimahapatra708]

U did it man!!! 😘😘😘

[@ee22anilkumar76]

Thanks you very much sir ji

[@moments_unforgettable_earth]

Thanks a lot for your valuable video..

[@landonjackson284]

The way he ends the sentences is killing me.

[@sandip_kanzariya8476]

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

[@airdhe8005]

the best explanation

[@moumitade6265]

Excellent 😀😀

[@ChemKirti]

Thank you so much for this vedio...

[@adityakashyap2237]

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

[@ALLABOUTELECTRONICS]

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]

Ok Sir

[@sunildesai5531]

Nicely explained

[@arvind3656]

Nice video 👍👍👍👍👍👍

[@saiteja.s]

Helpful

[@kuldeepnishad2194]

Maja aa gaya !

[@atexnik]

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]

to kya kare?

[@parth6661]

BEST VIDEO!

[@deepachauhan9365]

Thanks 😊 sir

[@purpiedurpie]

best vedio in utub

[@purpiedurpie]

op

[@purpiedurpie]

pls reply @ALL ABOUT ELECTRONISCS

[@atanudey6507]

Thank u so much

[@prasanthkumar9699]

nice explaination sir

[@sathvikambati3464]

Thank you Sir

[@smerdyakov_11]

Thanks a lot

[@satviksharma1146]

Epic!

[@ahmadzia7528]

thums up for yuh guys !

[@playerplaying3936]

Thanks

[@asadulhuq]

Excellent!

[@charansai3457]

Thanks sir...

[@Pariharnawab]

Thanks sir

[@deenathayalan-i9j]

How zener diode maintain constant voltage across load,how it reduces voltage?let me explain plz

[@mohanmanikanth8687]

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

[@rana09able]

Nice

[@sravanisiva8414]

Tq very much 🙏

[@dhirajkumarsahu999]

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]

Yes.

[@dhirajkumarsahu999]

@@ALLABOUTELECTRONICS thank you so much !!!

[@blakshmipriya2853]

Thankyou sir

[@TakHandler]

Thxx bro

[@mayurshah9131]

Very good

[@nirbhaykumarchaubey8777]

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]

Yes will do it soon

[@believethat6739]

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]

Please check this video, you will get it. kzbin.info/www/bejne/eZukh5mNlJudq9k After watching it, if you still have any dount then let me know here.

[@omarhosari479]

brilliant

[@mohitkwatra9587]

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]

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

[@savisavisavisai1571]

👌👌sir

[@rajakaintura5709]

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?

[@shashanks7346]

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

[@queencyfernandes6369]

how does the dynamic impedance vary with zener current?

[@guardofhonour3089]

ex2:expressing with constants

[@bhaveshaghara750]

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]

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

[@nathan.m9109]

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

[@ALLABOUTELECTRONICS]

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]

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

[@raulboja8679]

can i use this in motorcycle as voltage regular

[@rajeevsingh1298]

Upload next video sooooon....

[@mr.tesla2837]

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

[@ALLABOUTELECTRONICS]

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.

[@prabesh5339]

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

[@ALLABOUTELECTRONICS]

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]

Thank you sir .

[@abhijithanilkumar4959]

Why don't you publish a book Sir Just copy paste the sub titles along with the diagrams Let the books name be "All About Electronics" itself It is gonna be a bestseller Btw which books do you recommend to electronics aspirants???

[@ALLABOUTELECTRONICS]

You can some of the basic electronics books. 1) Electronics Principles by Malvino 2) Electronic devices and circuit theory by Robert Boylestad

[@abhijithanilkumar4959]

@@ALLABOUTELECTRONICS thank you sir Thank you

[@inercija]

namaste

[@juanalvares11]

very wasy to understand ,

[@ngkean9743]

wat is Izm

[@ALLABOUTELECTRONICS]

It is the maximum allowable Zener Current. If the Zener current is more than that, it can damage the diode.

[@venkat.sairam]

please provide notes and make an app please.

[@guardofhonour3089]

Vi,Rs also can vary

[@frankreiserm.s.8039]

How can Is(max) be above Izm?

[@ALLABOUTELECTRONICS]

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.

[@9629024694]

Deep explanation, Very nice

[@himanshdaksh1834]

can you provide us notes?

[@josephmichaelm8139]

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

[@keviseiralu4536]

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]

@@keviseiralu4536 Thank you :)

[@yys9801]

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]

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]

@@ALLABOUTELECTRONICS thanks for ur reply.

[@yys9801]

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