Probably the most used component nobody knows of! TL431 Guide! EB#50

Comments · 535

• GR

  @greatscottlab · 5 years ago · pinned

  The first 1,000 people to use this link will get a 1 month free trial of Skillshare: <a href="https://skl.sh/greatscott10211">https://skl.sh/greatscott10211</a>

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• BR

  @br1ckbr3ak3r · 4 years ago

  Anyone else on youtube: Let&apos;s get started!<br>Great Scott music starts playing in head

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• TO

  @tobias7166 · 4 years ago

  GreatScott: Switch mode power supply are amazing !<br>Measurement Engineer : <b>screaming</b>

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• EL

  @ELECTRONOOBS · 4 years ago

  What a huge coincidence to have the same topic. When I&apos;ve posted my video and saw your post &nbsp;too I couldn&apos;t believe it. The odds are low:))) Btw, very nice video 👌🏻

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• JE

  @jensschroder8214 · 4 years ago

  I had a 24 volt switched-mode power supply but needed 19 volts. To do this, I simply changed the voltage divider on the TL431. I connected a potentiometer (value corresponding to the old resistor that I removed) between the plus 24 volts and the 2.5 volt sense point of the TL431 and reduced the value until I could measure 19 volts at the output. Then I replaced it with a fixed resistor.

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• SC

  @scunnerdarkly4929 · 4 years ago

  This is the freakiest thing ever. Possibly. I’ve literally just been pricing up TL431s for the SMPS section of the Mac Classic analogue board (PSU and CRT section) schematic I’m staring at right now, when the notification for this video came through. Timing could not have been more perfect!

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• GE

  @georgeh1352 · 2 years ago

  Working out how circuits work doesn&apos;t come easy for this old guy, so good explanations are a God send. Many thanks, have subscribed and hope to see more of your videos.

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• SO

  @sofiaco1513 · 4 years ago

  TechBuilder made a short facebook post on this a few months ago. Never knew how nifty it could be by adding an outboard pass transistor. Been using it as a handy adjustable voltage reference for adcs

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• UC

  @ucantSQ · 4 years ago

  Good find! And even better that you felt it was cool enough to feature in a video.

• PI

  @piconano · 4 years ago

  Please keep in mind one important characteristic of this programmable Zener IC. <br>It&apos;s fully temperature compensated, unlike any Zener that ever lived. <br>Zeners are so yesterday.

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• JO

  @joop2295 · 4 years ago (edited)

  Used the TL431 in several applications,. Yes, very versatile component!<br>You call the internals of the TL431 a comparator, but it is really an opamp. <br>You can use an opamp as a comparator, but in most cases you cannot use a comparator as an opamp, <br>because comparators are not stable in the linear region. A TL431 can be used in the linear region, when you use proper compensation.

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• BO

  @BobMonsen · 4 years ago

  Think of the TL431 as an NPN transistor with a Vbe of 2.5 volts, and a super high beta.

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