Design a Zener regulator, regulated power supply using a 12V zener diode. When source voltage range from 15V to 20V and the load current ranges from 20mA to 100mA.
a. Determine proper choice of Ri
b. Determine maximum power dissipated in the Ri
c. Determine the output voltage Vout min and Vout max if Zener Diode has a resistance Rz = 3 ohms
Here is the circuit diagram :
simulate this circuit – Schematic created using CircuitLab
My question is how do I determine RL? As far as I can tell the information about range of input voltage and range of load current will help me calculate RL. But how to do it? Also, the min and max limit of current through load is given, for what value of Vi will load current maximum and for what value of Vi will the load current be minimum?
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