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In a zener regulatedpower supply a zenerdiode with Vz = 6 Visused for regulation.The load current is tobe 4 mA and theunregulated input is10 V. What should bethe value of seriesresistor Rs? |
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Answer» The resistor value is 167 ohm. Solution: The load current when regulated perfectly must have value of series resistance as R in order that the Zener diode has larger current flow than load current. The value of series resistance is calculated as follows, Given: Zener Voltage, = 6 V = 4 m A Unregulated input = 10A Now the total current is given by, I = 20 + 4 = 24 m A Voltage drop across the series resistance = Unregulated – Regulated V = 10 – 6 V = 4 v Therefore, series resistance R = 167 ohm. |
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