Zener Diode circuit design Calculator

This CalcTown calculator calculates the Input Resistance (R_i) in a Zener Diode voltage regulator circuit so that the designed specifications of input voltage and load resistance can be met.

*Please note that it has been assumed that the minimum Zener Current is 10% of the maximum Zener Current. Although in more practical applications, it is usually 20-30%.

**Out of the two resistance values shown in the output, please choose the one with lower magnitude and neglect the higher value.

Zener Diode circuit design Calculator

Maximum Input Voltage (V_PS (max))

Minimum Input Voltage (V_PS (min))

Maximum Input Load Current (I_L (max))

Minimum Input Load Current (I_L (min))

Regulated Output Voltage (V_Z)

Result

Maximum Zener Current

K-Ohm

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where

V_PS = Voltage of the Power Source

I_L= Current Flowing through the Load Resistance

I_Z= Current Flowing through the Zener Diode

V_Z = Zener Voltage

I_Z(max)= Maximum Zener Current

and Load Resistance and Power Source Voltage are variable over a certain range.