Question 5 (IEIIQ18)
A simple Zener shunt voltage regulator is to supply a 10 V to load of 100 mA, the input supply voltage varies between 15 V and 20 V.
5.1 Draw the circuit diagram.
5.2 Calculate the minimum power for the Zener that could be used safely in this circuit.
5.3 Using a Zener diode with a power rating of twice this minimum value.
5.4 Calculate the range of series resistance that may safely be used in this circuit and suggested a suitable standard resistance value.
Question 6 (IEIIQ19)
A voltage regulator is required to provide a regulated terminal voltage of 25 V at a maximum load of 150 mA. The input volage varies between 50 V and 75 V dc.
6.1 Calculate the minimum power for the Zener that could be used safely in this circuit.
6.2 If a 30 W rated Zener is used, calculate the range of possible series resistance, RS. values and suggest a suitable standard E12 resistor value.
Question 5 (IEIIQ18)
A simple Zener shunt voltage regulator is to supply a 10 V to load of 100 mA, the input supply voltage varies between 15 V and 20 V.
5.1 Draw the circuit diagram.
5.2 Calculate the minimum power for the Zener that could be used safely in this circuit.
5.3 Using a Zener diode with a power rating of twice this minimum value.
5.4 Calculate the range of series resistance that may safely be used in this circuit and suggested a suitable standard resistance value.
Question 6 (IEIIQ19)
A voltage regulator is required to provide a regulated terminal voltage of 25 V at a maximum load of 150 mA. The input volage varies between 50 V and 75 V dc.
6.1 Calculate the minimum power for the Zener that could be used safely in this circuit.
6.2 If a 30 W rated Zener is used, calculate the range of possible series resistance, RS. values and suggest a suitable standard E12 resistor value.
