Lm350 power supply circuit
How can i determine the value of the R2 potentiometer for an input voltage to the regulator at 12volts and a 1.5v output voltage needed?
thanks,
Dimitri Guest
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Lm350 power supply circuit
How can i determine the value of the R2 potentiometer for an input voltage to the regulator at 12volts and a 1.5v output voltage needed?
thanks,
Dimitri Guest
Hi dimitri123
As noted in your attachment, the last term with Iadj can usually be neglected when it is small relative to the total current. In that case, the equation reduces to the following and can be solved easily for R2.
I get 24 ohms. You can check this easily with one of the online calculators, e.g. https://diyaudioprojects.com/Technical/Voltage-Regulator/
If you are looking for a potentiometer, a 50 or 100 ohm model might work well.
Hi dimitri123
As noted in your attachment, the last term with Iadj can usually be neglected when it is small relative to the total current. In that case, the equation reduces to the following and can be solved easily for R2.
I get 24 ohms. You can check this easily with one of the online calculators, e.g. https://diyaudioprojects.com/Technical/Voltage-Regulator/
If you are looking for a potentiometer, a 50 or 100 ohm model might work well.
