Question

Draw and design a Zener voltage regulator circuit to provide output of 12 V for a maximum load current of 0.5 A, when the input voltage regulation is 15 to 18V

Answer 1

Answer:

The zener current I

Z

will minimum when the load resistance is maximum and the input voltage will also minimum.

Thus, I

T

=I

Z

(min)+I

L

(max)

By KVL, V

in

(min)−V

Z

=I

T

R=[I

Z

(min)+I

L

(max)]R

so, R=

(20+50)×10

−3

10−5

=71.43Ω