Understanding TL431 Adjustable Reference, Theory and Practical {1203}

In this video number {1203} Understanding TL431 Adjustable Reference, Theory and Practical. I explained precision voltage adjustable reference regulator. it is most commonly used in feedback loop in isolated power supplies / converters. TL431 ICs integrated circuits are 3−terminal programmable shunt regulators. These monolithic IC voltage references operate as a low temperature coefficient zener which is programmable from Vref to 36 V with two external resistors. These devices exhibit a wide operating current range of 1.0 mA to 100 mA with a typical dynamic impedance of 0.22. The characteristics of these references make them excellent replacements for zener diodes in many applications such as digital voltmeters, power supplies, and opamp circuitry. The 2.5 V reference makes it convenient to obtain a stable reference from 5.0 V logic supplies, and since the TL431, A, B operates as a shunt regulator, it can be used as either a positive or negative voltage reference.
Features
Programmable Output Voltage to 36 V. Voltage Reference Tolerance: ±0.4%, Typ @ 25°C (TL431B). Low Dynamic Output Impedance, 0.22 Typical. Sink Current Capability of 1.0 mA to 100 mA. Equivalent Full−Range Temperature Coefficient of 50 ppm/°C Typical. Temperature Compensated for Operation over Full Rated Operating Temperature Range. Low Output Noise Voltage. These are Pb−Free and Halide−Free Devices
it behaves as a comparator, comparing the VREF pin voltage to the internal virtual reference voltage. When provided a proper cathode current (IK), TL43xx will have enough open loop gain to provide a quick response.
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[@DaftOldMan]

I made a very similar video last week but it will not be released for months. What a coincidence. I used a breadboard and then soldered the circuit. I enjoy your videos and learn alot. Thank you.

[@HaseebElectronics]

wow that is awesome. i will wait for that video humble thanks for your valuable encouraging words.

[@sukhdeosingh617]

Every video of yours is amazing.

[@k3ggaming926]

Always the best teacher in youtube electronics❤

[@gauripartapshanker9197]

Very informative vedeo. Thank you so much. God bless you.

[@HaseebElectronics]

it is my pleasure

[@kaleelurrahumanrahuman99]

I'm from Sri Lanka sir that I request regarding clamp meter circuit diagram and working system how could fault finding the defective clamp circuit and rectify could you please explain thanks

[@behe2706]

Sir Goldstar 9500 satellite receiver has no output vcc cap and switching ic have unstable voltage 2R2 2R4 and 5R1 resisters gives continuity is it normal? thankyou

[@johnsonogbu8697]

Why is TL431 too difficult for me to understand?

[@HaseebElectronics]

yes. it is somewhat is difficult but interesting

[@mf7273]

Ich schaue mir gern deine Videos Beim Spannungsteiler sollte man präzise Widerstände benutzen الله يعونك سلام

[@HaseebElectronics]

Willkommen, Bruder. Ja, du hast recht. Wir müssen präzise Widerstände mit der geringsten Toleranz verwenden. Aber da es nur eine Demonstration war, habe ich gewöhnliche Widerstände verwendet, um einen Spannungsteiler zu bauen. الله يسلمك ويسعدك

[@rajkhumar001]

Really helpful sir. Yesterday i tried my self to increase the voltage of 12v adaptor to 15v. So i tried alter the divider point of tl431.So i used the following fomula to find the divider resistance value. =2.5×(1+R1÷R2) here R1=51k and R2=10k. so the output is 15.25v. And my output voltage is also as expected sir. My doubt is. Is it make a pulse to control the optocoupler or its just turn on the led sir. When ever i have a doubt about a specific topic, your also make video in same topic sir☺☺Thank you once again.

[@HaseebElectronics]

great you also need to change the current limit ratio with the same ratio if you increasing 12 volt to 15 volt and you are adjusting reference resistor network then the output voltage will increase in output of the TL431. which will cause to increase the optocouper LED current and it will also disturb the feedback so you need to increase the current limit resistor to decrease the LED current so the circuit will work without creating ripples or ringing in swithcing

[@rajkhumar001]

@@HaseebElectronics wow great sir. To understand your comment I read it 3 Time. Now I understand. The led current limit resistor value is already 2.2k . So I thought it would handle the led current. Thank you for your valuable comment sir. It makes some sense to me.

[@mjarefi]

Thanks brother for your knowledge and education

[@HaseebElectronics]

it is my pleasure

[@susantaatha6468]

Awesome. Thank you sir. Please sir explain how to programing MCU.

[@electronix.1]

this is👑 for you

[@jerryhatfield1404]

Great video!

[@jluke6861]

Great Videos as always. Thank you. Hasseeb.

[@nayanjagirdar8408]

Nice sir👌👍

[@mamostakurd3710]

Your old vid about TL431 was stonishing ,but this time 🤔 not so good .

[@omiza3416]

👍👍👍👍 Mobile charger 4.2v 800ma . Can i use resistor at the output to get less current, up to 300ma?

[@HaseebElectronics]

you can increase current sense resistor at MOSFET source pin to limit primary current so the output current will reduce

[@omiza3416]

Much appreciations sir👌👋

[@MostafaMahmoud-ts8ew]

Thanks sir for everything 🙏.. really thanks

[@W1RMD]

Great! Thanks and have a nice day!

[@restingroysurong805]

Without confuse sir again i request if two ic is connected in circuit board where is the returning path of current flow.please explain sir the returning path of current in ac and DC circuit.

[@HaseebElectronics]

Battery negative terminal is most of time reference point

[@mf7273]

Salam lebst du in Deutschland

[@HaseebElectronics]

wa alaikum salaam. ich komme aus Pakistan und bin jetzt in Jordanien

[@mf7273]

Salam أخي ich Versuche ein be quiet​ straight Power 11 zu reparieren ich habe den Verdacht dass die PFC defekt ist@@HaseebElectronics

[@scroopynooperz9051]

Haseeb top G!

[@krystekkr]

Hello , thank you for the lecture

[@HaseebElectronics]

You are welcome

[@transformateur9969]

Wow ! Wow ! Wow !