Zener based regulator. High current output

191

03:27:26

The 10ohm resistance at the output is the load. The resistance of 2ohms represents a parasitic resistance from the voltage source( for example from a rectification stage) 
Adjusting the potentiometer you can vary the output voltage.
Adjusting the resistances and potentiometer values and/or zener voltage,you can change the regulation range

published 5 years ago

Daithi_D

5 years ago

Can you do the same but instead of the variable being the potentiometer have the variable as the input voltage. For example input range from 10 to 100 and the output stays constant at 15?

Kimen

5 years ago

Yes you can! You would need to take out the potentiometer,and set the zener value/values of R to achieve 15V. What you can't do with this type of circuit,is to have an input lower than the output. Linear zener based regulators have a"dropout voltage",which is the minimum difference between the input and the output to assure a correct regulation

Kimen

5 years ago

And you would need to modify some components too,if you"play"with the input voltage,you will see that the current through the zener increases,and you have to keep it under the maximum. You can achieve this by re-designing the 2k resistance that feeds the base of the Darlington pair. But you would have to calculate the valid range of it

add comment in editor

EveryCircuit is an easy to use, highly interactive circuit simulator and schematic capture tool. Real-time circuit simulation, interactivity, and dynamic visualization make it a must have application for professionals and academia. EveryCircuit user community has collaboratively created the largest searchable library of circuit designs. EveryCircuit app runs online in popular browsers and on mobile phones and tablets, enabling you to capture design ideas and learn electronics on the go.