Q5(a) Figure Q5(a) shows a basic series voltage regulator circuit. VIN VOUT RREF QI U1 R $20 k2 DI R2 30 kN Figure Q5(a) (i) Calculate the output voltage, Vour if VIn = 50 V and voltage drop across D1 = 6.2 V. (ii) Illustrate a circuit diagram for overload protection between transistor Q1 and the load. (iii) Based on the answer in Q5(a)(ii), calculate the overload current IL(max).

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Q5(a) Figure Q5(a) shows a basic series voltage regulator circuit.
VIN
VOUT
RREF
Q1
U1
R $20 k2
Di
R2 30 k2
Figure Q5(a)
(i)
Calculate the output voltage, VoUT if VIN = 50 V and voltage drop across
D, = 6.2 V.
(ii)
Illustrate a circuit diagram for overload protection between transistor Q1
and the load.
(iii)
Based on the answer in Q5(a)(ii), calculate the overload current ILmax).
(b)
Figure Q5(b) shows a voltage regulator.
+35 V
LM 317
+Vout
R1
Vref 220 2
Iref
C3
C1
TR2
TADJ
C2
R2
5 kn
Figure Q5(b)
(i)
Determine the maximum and minimum output voltage for the voltage
regulator in Figure Q5(b), if IADJ = 25 µA and Vref = 0.9 V.
(ii)
Determine the output voltage of the regulator if R2 is set to 4 kN.
Transcribed Image Text:Q5(a) Figure Q5(a) shows a basic series voltage regulator circuit. VIN VOUT RREF Q1 U1 R $20 k2 Di R2 30 k2 Figure Q5(a) (i) Calculate the output voltage, VoUT if VIN = 50 V and voltage drop across D, = 6.2 V. (ii) Illustrate a circuit diagram for overload protection between transistor Q1 and the load. (iii) Based on the answer in Q5(a)(ii), calculate the overload current ILmax). (b) Figure Q5(b) shows a voltage regulator. +35 V LM 317 +Vout R1 Vref 220 2 Iref C3 C1 TR2 TADJ C2 R2 5 kn Figure Q5(b) (i) Determine the maximum and minimum output voltage for the voltage regulator in Figure Q5(b), if IADJ = 25 µA and Vref = 0.9 V. (ii) Determine the output voltage of the regulator if R2 is set to 4 kN.
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