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Block Diagram for an AC to DC Converter (Power Supply)
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Zener Diode Circuits for Power Supply Designs
Section 4.4
In this lecture, we will:
Apply the characteristics of the Zener diode to a Zener diode voltage regulator circuit.
Block Diagram for an AC to DC Converter
(Power Supply)
Voltage Regulator
The characteristics of the Zener diode determines VL.
LIZ
i
ZPSI
L
ZL
IIIRVV
I
RVI
Example Problem I
Example Problem I
Example Problem I
Example Problem II
Example Problem II
Example Problem II
Example Problem II
Load Line Analysis
The reverse bias I-V is important for Zener diodes.
The Zener diode begins to conduct when VPS = VZ. When VPS ≥ VZ: VL = VZ
IL = VZ/RL,, but VZ ≠ constant
I1 = (VPS – VZ)/Ri
IZ = I1 - IL
Voltage Rectifier with nonzero Zener resistance
Example Problem III
Example Problem III
Example Problem III
Example Problem III
Example Problem III
Example Problem III
Example Problem IV
Example Problem IV
Example Problem IV
Example Problem IV
Example Problem IV