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11. A Zener diode is connected in a voltage regulator circuit as shown in Figure Q9. The Zener voltage is Vz 10 V and the Zener resistance is assumed to be rz = 0. (a) Determine the value of R such that the Zener diode remains in breakdown if the load current varies from I = 50 to 500 mA and if the input voltage varies from V = 15 to 20 V. Assume Iz (min) = 0.1Iz (max). (b) Determine the power rating required for the Zener diode and the load resistor.

11. A Zener diode is connected in a voltage regulator circuit as shown in Figure Q9. The Zener voltage is Vz 10 V and the Zener resistance is assumed to be rz = 0. (a) Determine the value of R such that the Zener diode remains in breakdown if the load current varies from I = 50 to 500 mA and if the input voltage varies from V = 15 to 20 V. Assume Iz (min) = 0.1Iz (max). (b) Determine the power rating required for the Zener diode and the load resistor.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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Solution to question 11 and 12 in the image below

Iz VI R VL Figure Q9 and Pz (max) = 10. In the voltage regulator circuit in Figure Q9, V, = 20 V, Vz = 10 V, R; = 222 400 mW. (a) Determine IL, Iz, and I, if RL = 3802. (b) Determine the value of RL that will establish Pz(max) in the diode. (c) Repeat part (b) if Ri = 1752. 11. A Zener diode is connected in a voltage regulator circuit as shown in Figure Q9. The Zener voltage is Vz = 10 V and the Zener resistance is assumed to be r, = 0. (a) Determine the value of R; such that the Zener diode remains in breakdown if the load current varies from IL = 50 to 500 mA and if the input voltage varies from V = 15 to 20 V. Assume Iz (min) = 0.1Iz (max). (b) Determine %3D %3D %3D %3D %3D %3D %3D the power rating required for the Zener diode and the load resistor. 12. A voltage regulator is to have a nominal output voltage of 10 V. The specified Zener diode has a rating of 1 W, has a 10 V drop at Iz = 25 mA, and has a Zener resistance of rz = 52. The input power supply has a nominal value of VPs = 20 V and can vary by ±25 percent. The output load current is to vary between I = 0 and 20 mA. (a) If the minimum Zener current is to be Iz = 5 mA, determine the required R. (b) Determine the maximum variation in output voltage. (c) Determine the percent regulation. 13. Consider the circuit in Figure Q13. Let VD = 0. (a) Plot vo Versus Vị over the range -10 <v <+10 V. (b) Plot i1 over the same input voltage range as part (a). 14. For the circuit in Figure Q14, (a) plot vo versus Vị for 0 vi < 15 V. Assume Vp = 0.7 V. Indicate all breakpoints. (b) Plot ip over the same range of input voltage. %3D %3D %3D 1 k2
Transcribed Image Text:Iz VI R VL Figure Q9 and Pz (max) = 10. In the voltage regulator circuit in Figure Q9, V, = 20 V, Vz = 10 V, R; = 222 400 mW. (a) Determine IL, Iz, and I, if RL = 3802. (b) Determine the value of RL that will establish Pz(max) in the diode. (c) Repeat part (b) if Ri = 1752. 11. A Zener diode is connected in a voltage regulator circuit as shown in Figure Q9. The Zener voltage is Vz = 10 V and the Zener resistance is assumed to be r, = 0. (a) Determine the value of R; such that the Zener diode remains in breakdown if the load current varies from IL = 50 to 500 mA and if the input voltage varies from V = 15 to 20 V. Assume Iz (min) = 0.1Iz (max). (b) Determine %3D %3D %3D %3D %3D %3D %3D the power rating required for the Zener diode and the load resistor. 12. A voltage regulator is to have a nominal output voltage of 10 V. The specified Zener diode has a rating of 1 W, has a 10 V drop at Iz = 25 mA, and has a Zener resistance of rz = 52. The input power supply has a nominal value of VPs = 20 V and can vary by ±25 percent. The output load current is to vary between I = 0 and 20 mA. (a) If the minimum Zener current is to be Iz = 5 mA, determine the required R. (b) Determine the maximum variation in output voltage. (c) Determine the percent regulation. 13. Consider the circuit in Figure Q13. Let VD = 0. (a) Plot vo Versus Vị over the range -10 <v <+10 V. (b) Plot i1 over the same input voltage range as part (a). 14. For the circuit in Figure Q14, (a) plot vo versus Vị for 0 vi < 15 V. Assume Vp = 0.7 V. Indicate all breakpoints. (b) Plot ip over the same range of input voltage. %3D %3D %3D 1 k2
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