**Zener Diode & Zener Voltage Regulator Calculator**

**Formulas and Equations for Zener Diode & Zener Voltage Regulator Calculator**

**Series Current**

I

_{S}= V_{IN}– V_{Z}/ R_{S}….. (Ohm’s Law Again)**Load Voltage**

**V**=

_{L }**V**

_{Z}**Change in Load Voltage**

**∆V**= I

_{L}_{Z}x R

_{Z}

**Output (Regulated) Voltage**

**V**

_{OUT}**=**V

_{IN}– IR

**=**V

_{IN}– (I

_{Z}+ I

_{L}) / R

_{S}

**=**(V

_{IN}– I

_{S}) / R

_{S}

**Load Current**

**I**= V

_{L}_{L}/ R

_{L}

**Zener Current**

**I**= I

_{Z}_{S}– I

_{L}

**Output ripple**

**V**

_{R}_{(OUT)}**≈**V

_{R}

_{(IN)}x (R

_{Z}/R

_{S})

**Maximum Series resistance**

**R**= R

_{S (MAX)}_{L (MIN) }x [(V

_{IN}

_{(MIN)}/ V

_{Z}) -1]

**Maximum Series resistance**

**R**= R

_{S (MAX)}_{L (MIN) }x [(V

_{IN}

_{(MIN)}– V

_{Z}) / I

_{L(MAX)}]

**Or Series Resistance**

**R**= (V

_{S}_{L }– V

_{out}) / (I

_{Z}+ I

_{L})

**=**(V

_{L }– V

_{out}) / (I

_{S})

**Value of Resistor**

**R**= [(V

_{IN}

_{(MIN)}– V

_{OUT}) / (I

_{L}+ 10)]

**Power of Resistor**

**R**= (V

_{P}_{IN}

_{(Max)}– V

_{out})

^{ 2}/ R

**Power of Zener Diode**

**Z _{P} **= (V

_{IN}

_{(MIN)}– V

_{OUT}) / R) x

**V**

_{OUT}
Enter value and click on calculate. Result will be displayed.

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Wowss Good brother ..

Thanks for appreciation 🙂

Very nice, useful and instant calculation. ThanQ

To calculate Vout , we need Rs

VOUT= Vin – Ir = Vin – (Iz + IL) / Rs = (Vin – Is) / Rs

and then to calculate Rs We need V out again

RS = (VL – Vout) / (IZ + IL) = (VL – Vout) / (IS)