Hey fella's,
Main Question:
If a TL431 is set/programmed with a voltage divider how does that work when the circuit is being powered from a battery since the voltage is constantly decreasing which would change the value of the voltage divider correct?
Long version:
So recently I've been seeing a lot of circuits that have to do with batteries etc... using the TL431 or similar...
From my research I've gathered that the TL431 can be thought of as an adjustable / programmable zener diode. And by creating a voltage divider will determine/set the value.
I understand all that and I've got it to work on a breadboard. I can set the voltage divider to have the TL431 to conduct or not So I understand how to set it and how it works.
But what I do not understand is how the TL431 is being used when it's in a circuit powered by a battery because -
If I use a voltage divider calculator and the input voltage is let's say 12v and I want 10v on the voltage divider I used two resistors of a certain value. But if the circuit is powered from a battery and that voltage is constantly changing and getting lower then my voltage divider value is also constantly changing...
So how do you set a TL431 with a voltage divider connected to a battery and the output of the voltage divider is always changing as the battery voltage decreases?
Main Question:
If a TL431 is set/programmed with a voltage divider how does that work when the circuit is being powered from a battery since the voltage is constantly decreasing which would change the value of the voltage divider correct?
Long version:
So recently I've been seeing a lot of circuits that have to do with batteries etc... using the TL431 or similar...
From my research I've gathered that the TL431 can be thought of as an adjustable / programmable zener diode. And by creating a voltage divider will determine/set the value.
I understand all that and I've got it to work on a breadboard. I can set the voltage divider to have the TL431 to conduct or not So I understand how to set it and how it works.
But what I do not understand is how the TL431 is being used when it's in a circuit powered by a battery because -
If I use a voltage divider calculator and the input voltage is let's say 12v and I want 10v on the voltage divider I used two resistors of a certain value. But if the circuit is powered from a battery and that voltage is constantly changing and getting lower then my voltage divider value is also constantly changing...
So how do you set a TL431 with a voltage divider connected to a battery and the output of the voltage divider is always changing as the battery voltage decreases?