Electronic Devices - Semiconductor Diodes - Discussion
Discussion Forum : Semiconductor Diodes - General Questions (Q.No. 27)
27.
Determine the nominal voltage for the Zener diode at a temperature of 120° C if the nominal voltage is 5.1 volts at 25° C and the temperature coefficient is 0.05%/° C.
Discussion:
8 comments Page 1 of 1.
Priyanka said:
1 decade ago
Hello friends,
Find below steps to solve problem:
Cz - Temperature Coefficient of zener diode.
T1 - Temperature at nominal voltage.
T2 - Temperature at 2nd condition.
V1 - Nominal voltage.
V2 - required voltage.
Vd = V2-V1.
Formula:
Vd = Cz x V1 x (T2-T1)/100.
Solution:
Vd = 0.05 x 5.1 x (120-25)/100.
Vd= 0.242.
but Vd= V2-V1.
V2 = Vd+V1.
V2 = 0.242+5.1.
V2 = 5.34V.
Hence answer is Option D.
Find below steps to solve problem:
Cz - Temperature Coefficient of zener diode.
T1 - Temperature at nominal voltage.
T2 - Temperature at 2nd condition.
V1 - Nominal voltage.
V2 - required voltage.
Vd = V2-V1.
Formula:
Vd = Cz x V1 x (T2-T1)/100.
Solution:
Vd = 0.05 x 5.1 x (120-25)/100.
Vd= 0.242.
but Vd= V2-V1.
V2 = Vd+V1.
V2 = 0.242+5.1.
V2 = 5.34V.
Hence answer is Option D.
(3)
Ali Habab said:
1 decade ago
Am get the answer as only 6.031.
What wrong is me on?
What wrong is me on?
(1)
Radhika said:
6 years ago
Tc = ((vf-vi)/(tf-ti))*(100/vi).
(1)
Kimi said:
4 years ago
No need for a computation because the question is the "nominal voltage" and not the nominal Zener voltage. Therefore, the answer is in the given, 5.1V.
Don't confuse about your answer 6.03. It is also correct but what is asked is NOMINAL VOLTAGE and not "nominal Zener voltage".
Don't confuse about your answer 6.03. It is also correct but what is asked is NOMINAL VOLTAGE and not "nominal Zener voltage".
(1)
Lakshmi shravan said:
1 decade ago
temp%=[change in voltage/change in temp]*vol at initial temp
Sathish said:
1 decade ago
I used this formula & getting 6.031379V.
Hero said:
8 years ago
Formula:.
V2 = V1 + V1 x Coeff x * T.
V2 = V1 + V1 x Coeff x * T.
Harold said:
5 years ago
Vf = Vi * [1 + (Coeff / 100)*(Tf - Ti)],
Vf = 5.1*[1 + (0.05/100)*(120-25)],
Vf = 5.43225 V.
Vf = 5.1*[1 + (0.05/100)*(120-25)],
Vf = 5.43225 V.
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