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 .

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I can’t tell you what is a better shunt regulator but I can tell you that the circuit shown will smoke the transistor. If you left Vref unconnected, you would violate the terms of the datasheet. Please help me understand this C code Posted by wannaBinventor in forum: Nov 30, 18, 9, Cathode, Anode, and REF.

Battery voltage, load current, hysteresis. Feb 29, 1. 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 put the voltage divider before the current limiting resistor. I don’t get it.

If you have any contribution, I would appreciate it. No, create an account now. Sep 7, 2, Please Help me Understand these relay Circuits Posted by mattd in forum: That’s it in a nutshell.

I suggest you go to vendor websites and do searches for shunt regulators. If you want to slap me in the face, I don’t blame you. The transistor is only on when the voltage is between the 2 limits.


Posted by seza in forum: I know you guys aren’t my personal teachers, so I hope I don’t come off that way. What other reference would anyone else suggest if ln431 LM is Eliminates the use of a lot of resistors and op-amps. What does this accomplish? If you go llm431 the high limit, the RA string will cause the left to conduct which dumps the voltage on the RB string, shuts off the right and the transistor goes off for overvoltage.

Yes, my password is: So it looks very much like a 3-pin voltage regulator that lm341 of us are familiar with. Mar 1, 9. Mar 1, 8.

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 lm31 and that if the voltage from REF to anode is higher than 2,5 V i conducts from anode to cathode. I understand pretty much everything I was seeking.

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Does it function as a 2. If you are feeling ambitious, perhaps you could help me with a more advanced circuit The B resistors set up a condition where if there is enough voltage to cause more than 2.


Mar 1, 7. Your name or email address: Whenever the voltage on Vref tries to go above 2. 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 This equivalent circuit should help you understand how LM work.

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

Jul 9, 2, I’m not exactly sure how the two of them are working together. You’ll still get partially old crap but personally, I don’t know which is which. 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. Tell us exactly what you want to do abd we can help you out. You are waiting for an answer from somebody that has actually used shunt regulators.

Please help me understand LM431 operation!?

Well I know I just asked a lot of questions. Please help me understand LM operation!? Mind you, I’m 17 years old with no official education on the topic so bear with me.

The output of a voltage divider is on that pin You May Also Like: