V-I characteristics of Power Diode
The V-I (voltage-current) characteristics of a power diode describe its behavior in terms of voltage and current when operating in different modes.
- With increase of the source voltage Vs from zero to cut- in voltage, the forward- diode current is veritably small.
- Cut- in voltage is also known as threshold voltage or turn- on voltage.
- The current of the diode rises rapidly for the values lying beyond the cut-in voltage and the diode starts conducting.
- For silicon diode, the cut- in voltage is around 0.7 V. When diode conducts, there’s a forward voltage drop of the order of 0.8 ~1V.
- For high power diodes, the forward current grows linearly with increase in voltage.
- For low power diodes, the forward current first increases exponentially with the voltage and then becomes linear with respect to change in voltage.
- In the reverse biased condition, a small reverse current called leakage current, arises.
- The leakage current is nearly independent of the magnitude of reverse voltage until this voltage reaches breakdown voltage. At this breakdown point, voltage remains nearly constant but reverse biased current becomes relatively high-limited only by the external circuit resistance.
- By operating the diode below the peak reverse repetitive voltage VRRM .
- Peak Inverse Voltage is the largest reverse voltage to which a diode may be subordinated during its working. PIV is the same as VRRM
Power Diode
In this Article, We will be going to see the Power Diode, the V-I characteristics of a Power Diode, Reverse Recovery Characteristics, the Need for a power Diode, the Construction of power diodes, Working of Power diodes with their types. At last, we will conclude our article With Advantages, Disadvantages, and FAQs.
Table of Content
- What is Power Diode?
- V-I characteristics of Power Diode
- Reverse Recovery Characteristics
- Need for power Diode.
- Construction of power diodes
- Working of Power diodes
- Types of Power Diode