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How do diodes work in parallel?
If the load current is greater than the current rating of a single diode, then two or more diodes can be connected in parallel (see Figure 1) to achieve a higher forward current rating. Diodes connection in parallel do not share the current equally due to different forward bias characteristics.
What happens when two Zener diodes are connected back to back?
When the back-to-back arrangement of identical Zener diodes in series is connected to a DC voltage source, the following occurs: Because the reverse biased diode has the highest impedance, it has the largest voltage drop, which limits the current produced by the forward biased diode (due to Kirchoff’s voltage law).
How does Zener diode work?
Zener diodes behave much the same as ordinary silicon diodes and start conducting at around 0.7V
What is the impedance of a Zener diode?
What is the impedance of a Zener diode? Zener impedance is the equivalent series resistance of a Zener diode when it is conducting current. It is calculated as a change of Zener voltage, ΔV Z, that occurs as a result of a tiny change in Zener current, ΔI Z. Zener impedance should ideally be zero, but in reality, a Zener diode has some impedance.
What is the current, IZM, of a Zener diode?
Current : The current, IZM, of a Zener diode is the maximum current that can flow through a Zener diode at its rated voltage, VZ. Typically there is also a minimum current required for the operation of the diode. As a rough rule of thumb, this can be around 5 to 10 mA for a typical leaded 400 mW device.
What is the Zener voltage?
The Zener voltage is the voltage at which the depletion region completely vanish. The reverse bias applies across the diode increases the intensity of electric field across the depletion region. Thus, it allows the electrons to move from the valence band of P-type material to the conduction band of N-type material.
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