Electronics devices

Line Regulation with Zener Regulator Line Regulation with Zener Regulator Zener regulator under varying input voltage condition It can be seen the input is Vo=Vzis constant IL = Vo/Rl = Vz/Rl = constant And I = Iz+IL Now If Vin increases, than the total current I increases. But IL is constant as Vz is constant as Vz in constant. Hence the current Iz increases to keep IL constant But as long as Iz is between Izmin and Izmax, the Vz i.e output voltage Vo is constant Thus the changes in input voltage get compensated and output is maintained constant. Similarly if Vin decreases, than current I decreases. But to keep IL constant, Iz decreases. As long as Iz is between Izmax and Izmin the output voltage remains constant. the maximum power dissipation for the zener diode is fixed and given by Pd = VzIz max