1. An 7.5 V zener diode (7.5 V at 25 deg C) has a negative temperature coefficient of 0.01%/ deg C What is the zener voltage at 75 deg C.

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1. An 7.5 V zener diode (7.5 V at 25 deg C ) has a negative temperature coefficient of
0.01%/ deg C What is the zener voltage at 75 deg C.
2. A certain zener diode has a maximum power rating of 300 mW at 40 deg C and a
derating factor of 1.4mW/deg C. Determine the maximum power the zener can
dissipate at a temperature of 80 deg C.
3. From the datasheet, a 1N4728A zener diode has a ZZ of 10 Q. The datasheet gives VZ
= 3.3 V at a test current, IZ, of 76 mA. What is the voltage across the zener terminals
when the current is 90 mA? When the current is 45 mA?
%3D
Transcribed Image Text:1. An 7.5 V zener diode (7.5 V at 25 deg C ) has a negative temperature coefficient of 0.01%/ deg C What is the zener voltage at 75 deg C. 2. A certain zener diode has a maximum power rating of 300 mW at 40 deg C and a derating factor of 1.4mW/deg C. Determine the maximum power the zener can dissipate at a temperature of 80 deg C. 3. From the datasheet, a 1N4728A zener diode has a ZZ of 10 Q. The datasheet gives VZ = 3.3 V at a test current, IZ, of 76 mA. What is the voltage across the zener terminals when the current is 90 mA? When the current is 45 mA? %3D
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