I was looking into this circuit for constant current sink and was wondering about the working
and output voltage of this circuit.
I am trying to implement this circuit and in my case the input voltage will be bit higher(<10v).
How would this affect the circuit. Sink current(Io) should be connected to negative of battery?
In short: The device regulates for a constant voltage across two of it's pins. If you now connect a resistor across these two pins: Then (according Ohm's law) you get a constant current.
In short: The device regulates for a constant voltage across two of it's pins. If you now connect a resistor across these two pins: Then (according Ohm's law) you get a constant current.
See the circuit above:
* TL43xx is the voltage regulator. Please read it´s datasheet about it´s operation.
* Rs is the resistor that determines the constant current, because the TL43xx regulates a constant voltage across Rs. I = V / R
I wonder about this question. How should I understand it?
What else do you want to do with a constant current circuit?
And if it was not your inital plan to connect it to a load .. why did you choose this circuit?
It´s like buying a TV set and asking: What to do with it - should I watch TV?