December 5, 2018


LM Adjustable Precision Zener Shunt Regulator. General Description. The LM is a 3-terminal adjustable shunt regulator with guaranteed temperature. LM are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for LM Texas Instruments LM Series Voltage References are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for Texas Instruments .

Author: Mazut Tygolrajas
Country: Brunei Darussalam
Language: English (Spanish)
Genre: Life
Published (Last): 15 January 2015
Pages: 35
PDF File Size: 17.29 Mb
ePub File Size: 4.87 Mb
ISBN: 592-6-68030-206-5
Downloads: 48164
Price: Free* [*Free Regsitration Required]
Uploader: Goltilar

Mar 1, 8. No, create an account now.

Does it function as a 2. But what exactly is going on here? Tell us exactly what you want to do abd we can help you out. You’ll still get partially old crap but personally, I don’t know which is which. That’s it in a nutshell. Sep 7, 2, And then I presume the other resistors and capacitors are for BJT biasing? If you have any contribution, I would appreciate it.

If you want to use it as a battery cutoff circuit the REF voltage cannot depend on the state of the so you’d have to l431 the voltage divider before the current limiting resistor.

Mar 1, 7. Please help me understand this. Posted by ossumguywill in forum: Whenever the voltage on Vref tries to go above 2. Mar 1, 5. The is an adjustable zener.


Jul 9, 2, Hello, I’m trying to figure out how a shunt regulator works and more specifically the LM Nov 30, 18, 9, So it looks very much like a 3-pin voltage regulator that lm4431 of us are familiar with.

Lacking that much voltage low limitthe transistor will be off. I don’t get it. Eventually I want to use it as a low-voltage cut off for a battery powered application I have in mind, but I really want to understand the theory of operation The main thing you need to know in order to design anything with it is that it needs a minimum cathode current in order to work properly and that if the voltage from REF to anode is higher than 2,5 V i conducts from anode to cathode.

Mar 1, 9. Mar 1, 6. You can lookat it as an adjustable zener diode. What does this accomplish? So this is pretty much an adjustable Zener? You May Also Ml431 Your name l431 email address: That produces 4V km431 the output?

Please help me understand LM operation!? | All About Circuits

If you want to slap me in the face, I don’t blame you. You need a resistance in series with the base in order to keep the right from trying to get the base all the way up to Vbatt.

Cathode, Anode, and REF.

Sep 2, 2. NASA Projects May Soon Use Drones for Space Exploration Drone technology has found its way into ,m431 variety of applications ranging from recreational use, photography, security, climate monitoring, and even humanitarian aid.


But I’m confused about the REF pin. Please Help me Understand these relay Circuits Posted by mattd in forum: Quote of the day.

This equivalent circuit should help you understand how LM work. What other reference would anyone else suggest if the LM is Yes, my password is: I understand pretty much everything I was seeking.

Please help me understand LM431 operation!?

I know you guys aren’t my personal teachers, so I hope I don’t come off that way. Page 9 of the datasheet shows the internal diagram of the Feb 17, 4, 1, The first is similar lm43 the shunt regulator except the output get’s connected into middle of the resistor divider for the second If I understand lm43 correctly, feeding a different voltage into REF will change the VZener and thus you get a different output voltage?

Feb 29, 1. Please help me understand LM operation!? The transistor is only on when the voltage is between the 2 limits.

Odd as it may seem, the original poster came here to ask questions because he was having difficulty understanding the manufacturer’s LM datasheet.