## Peak Inverse Voltage (PIV) of a Diode
1. Definition:
- The peak inverse voltage (also known as reverse breakdown voltage or peak reverse voltage) is the maximum voltage that a diode or PN-junction can withstand in a non-conducting state (reverse bias condition) before breaking down.
- If this voltage is exceeded, the diode might get damaged.
2. Importance:
- PIV is a critical parameter for diodes, especially in rectifier circuits.
- It ensures that the diode can handle the maximum reverse voltage without failing.
3. Calculation:
- The PIV rating of a diode is specified by the manufacturer in the datasheet.
- For a silicon diode, the PIV occurs at the peak value of each negative half-cycle of the input AC waveform.
- The formula for PIV is given as:
[ ext{PIV of Diode} = E_{ext{sm}} ]
where:
- (E_{ext{sm}}) represents the peak value of the secondary voltage (secondary winding of the transformer).
4. Application:
- In rectifier circuits, ensure that the maximum value or peak value of the AC supply does not exceed the PIV rating of the diode.
- Proper diode selection based on the desired circuit specifications and PIV rating is crucial.
5. Calculation Example:
- Consider the circuit diagram shown below for PIV calculation:
- The PIV of the silicon diode is calculated in the reverse bias condition or non-conducting state of the diode.
- When the D2 diode is reverse biased, the total voltage of the secondary winding of the transformer is dropped across it.
In summary, understanding the PIV of a diode ensures proper diode selection and reliable operation in rectifier circuits¹²³.
(1) Peak Inverse Voltage : Calculation and Its Importance - WatElectronics.com. https://www.watelectronics.com/what-is-peak-inverse-voltage-its-importance/.
(2) Peak inverse voltage - Wikipedia. https://en.wikipedia.org/wiki/Peak_inverse_voltage.
(3) Peak Inverse Voltage of Diode - Electrical Concepts. https://electricalbaba.com/peak-inverse-voltage/.
(4) What is Peak Inverse Voltage? definition - Circuit Globe. https://circuitglobe.com/peak-inverse-voltage-piv.html.
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