Design a Zener diode voltage regulator circuit as shown in Fig. 3(b) to charge a rechargeable battery of voltage VB = 10V. The battery is charging with a constant current 20mA. Assume that the transformer primary to secondary coils turns ratio is N:N2 = 16:1. The normal AC voltage, vp = 220V (rms) and can vary +10% during charging. If the rectifire diode cut-in voltage, V = 0.7V and forward resistance rs = 0. i. Determine Ri when the battery is charging and the minimum Zener current is Iz(min) = 5mA. ü. Determine the maximum power dissipation in the Zener diode when the battery is disconnected from the circuit.
Design a Zener diode voltage regulator circuit as shown in Fig. 3(b) to charge a rechargeable battery of voltage VB = 10V. The battery is charging with a constant current 20mA. Assume that the transformer primary to secondary coils turns ratio is N:N2 = 16:1. The normal AC voltage, vp = 220V (rms) and can vary +10% during charging. If the rectifire diode cut-in voltage, V = 0.7V and forward resistance rs = 0. i. Determine Ri when the battery is charging and the minimum Zener current is Iz(min) = 5mA. ü. Determine the maximum power dissipation in the Zener diode when the battery is disconnected from the circuit.
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