HW_5 - EE438 Homework #5 Zener Diode Regulated Power Supply...

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EE438 Homework #5 Zener Diode Regulated Power Supply In the circuit below, a Zener diode regulator is used to stabilize the load voltage of a peak rectifier. Use the following information to model the components in the circuit. Transformer Primary 115 VAC 60Hz Secondary 25.2 VAC CT 12.6 VAC 12.6 VAC 115 VAC C R 1N5239B Zener 1N4001GP 1N4001GP I L V L + _ I Z V SDC 1N4001GP V D0 = 0.7 V r d = 0 1Ν5239Β V Z = 9.1 V I ZT = 20 mA r Z = 5 1. a) For a Line Voltage of 115 VAC determine the value of R that will have I Zmin = 5 mA for load current (I L ) variations of from 0 to 50 mA. b) For a Line Voltage of 115 VAC use the value of R determined in a) to compute the maximum and minimum values of the Load Voltage, V L , for variations of the load current, I L , from 0 to 50 mA c) Use the value of R determined in a) to compute the maximum and minimum values of the Load Voltage, V L , for variations in the line voltage from 110 VAC to 120 VAC for a load current I L = 50 mA. d) Assuming that the Line Voltage is 115VAC and using the value of R determined in a),
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HW_5 - EE438 Homework #5 Zener Diode Regulated Power Supply...

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