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Dennis Feucht

Seemingly Simple Circuits: The TL431 Voltage Regulator, Part 1

Dennis Feucht
D Feucht
D Feucht
8/10/2016 9:39:20 PM
User Rank
Blogger
Re: One of the most used ones
You probably need not fear what you'll find in the rest of this TL431 series. I am not going to proclaim that everyone who has been using this part doesn't have a clue as to how to use it, and that it will be failing in the field soon!

Instead, the series is a tutorial exercise in revealing more of the details of what the part is, how it works, and what to be aware of about it. Explanation will be based on both feedback-circuit analysis (mostly some algebra) and what comes (and does not come) from part data of  various TL431 suppliers. The articles will continue to follow my style of writing: start with basic principles and build on them, step by step, hopefully leaving no big gaps in the explanation. (If I do, post questions.)

The TL431 has a widespread reputation as a stable voltage reference, and for this reason alone, it is worth investigating more fully. Yet there are likely to be some surprises in this series for some readers, annoyances for others, and hopefully some "Aha!" moments for all!

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Navelpluis
Navelpluis
8/10/2016 5:07:35 AM
User Rank
Newbie
One of the most used ones
Hi Dennis,

To my opinion this is one of the most used IC parts in electronics. Each design here at our design house brobably has 3 to 6 LM431 (or alike) parts in them. I am really scared to find out all the mistakes I probably have made, so please promise us to write this series of articles  ;-))

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ramsuku
ramsuku
8/4/2016 6:49:15 AM
User Rank
Newbie
Re: TL431
nice post buddy

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David Ashton
David Ashton
8/3/2016 6:32:20 PM
User Rank
Artist
TL431
Looking forward to the rest Dennis, the TL431 is a really versatile part.  Thanks.

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