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//chapter9
//example9.28
//page174
Ei=16 // V
Vz=12 // V since we want to ragulate at 12 V
Eo=Vz
Iz_min=0 // A
Il_max=200d-3 // A
// Zener current will be min when input voltage is min
// we see that R=(Ei-Eo)/(Iz-Il) and minimum Iz occurs when Il is maximum so
R=(Ei-Eo)/(Iz_min+Il_max)
Izm=Il_max
Pzm=Vz*Izm
printf("Zener voltage = %.3f V \n",Vz)
printf("required series resistance = %.3f ohm \n",R)
printf("maximum power rating of zener diode = %.3f W \n",Pzm)
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