The first 1,000 people to use this link will get a 1 month free trial of Skillshare: https://skl.sh/greatscott10211 Previous video: https://www.youtube.com/watch?v=j1V2I-otdzk Power Supply video: https://www.youtube.com/watch?v=ycT-PItAzNk Zener Diode video: https://www.youtube.com/watch?v=GtH8lAzQf2A Comparator video: https://www.youtube.com/watch?v=woTiKij76cA Facebook: https://www.facebook.com/greatscottlab Twitter: https://twitter.com/GreatScottLab Support me for more videos: https://www.patreon.com/GreatScott?ty=h Altium Designer: https://altium.com/yt/greatscott! In this video we will be having a look at a very versatile component, the TL431 IC. I used it in the feedback loop of my DIY switched mode power supply and thus got interested in it. That is why I will show you how it works, how you can use it in lot of different circuits and also how it functions in feedback loops of for example voltage converters. Let's get started! Useful websites you can visit for more information: https://www.ti.com/lit/ds/symlink/tl431.pdf?ts=1631534081428&ref_url=https%253A%252F%252Fwww.google.com%252F https://www.bristolwatch.com/ccs/TL431A.htm http://www.runonielsen.dk/Feedback.pdf https://www.site.uottawa.ca/~rhabash/Practical-Feedback-Loop-Design-Buck.pdf https://www.onsemi.com/pub/Collateral/TND381-D.PDF http://u.dianyuan.com/bbs/u/70/1360651225251207.pdf https://www.ti.com/lit/an/slvaf37/slvaf37.pdf?ts=1631594690215&ref_url=https%253A%252F%252Fwww.google.com%252F https://www.apogeeweb.net/circuitry/tl431-simple-circuits.html Thanks to Skillshare for sponsoring this video. Music: 2011 Lookalike by Bartlebeats 0:00 TL431 is amazing! 1:25 Intro 2:28 Basics 3:19 TL431 as a Comparator 4:32 TL431 as a 2.5V Zener Diode 5:51 TL431 as an adjustable Zener Diode 6:30 Various other applications 7:20 SMPS Feedback Loop Theory 8:46 TL431 in DIY SMPS