Table of Contents
- 1 What is zener knee current?
- 2 What could happen if the Zener diode would be changed to a zener which has a higher breakdown voltage?
- 3 When load current is zero zener current will be?
- 4 What is the purpose of a Zener diode in an electronic voltage regulator?
- 5 Which characteristics of Zener diode utilizes for voltage regulation?
- 6 What is maximum zener current?
What is zener knee current?
Zener Knee Current: The reverse current that flows through the zener diode while at the break-down voltage. Zener current shown as Iz in the data sheet. Zener Voltage: The break-down voltage of a zener diode. The abbreviation Vz is used in a data sheet to indicate Zener voltage.
What could happen if the Zener diode would be changed to a zener which has a higher breakdown voltage?
If the voltage exceeds the Zener breakdown then there would be current through the series resistor and a voltage drop equal to the difference between the applied voltage and the Zener breakdown. To get overvoltage protection from a Zener diode you must have a series resistor that will drop the excess potential.
When load current is zero zener current will be?
Answer: When load current is zero, the zener current will be 0.
What is minimum zener current?
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….Zener diode specifications.
| Zener Diode Voltage Values in E12 Range | ||
|---|---|---|
| 3.3 | 3.9 | 4.7 |
| 5.6 | 6.8 | 8.2 |
How do you calculate maximum zener current?
The maximum current is calculated by dividing the power rating by the Zener voltage: I=P/V = 3W/12V = 0.25A.
What is the purpose of a Zener diode in an electronic voltage regulator?
Zener diodes are widely used as voltage references and as shunt regulators to regulate the voltage across small circuits. When connected in parallel with a variable voltage source so that it is reverse biased, a Zener diode conducts when the voltage reaches the diode’s reverse breakdown voltage.
Which characteristics of Zener diode utilizes for voltage regulation?
Voltage regulator diodes utilize the reverse characteristics of a pn junction. When raising reverse voltage of pn junction diodes, high current starts flowing at a certain voltage, and constant voltage can be obtained.
What is maximum zener current?
IZM is the maximum current that can flow through the zener diode, PZM is the maximum power that the zener diode can handle, and VZ is the zener voltage. So if a zener diode has a zener voltage of 5.1V and a power rating of 1W, it can handle 1W/5.1V ma, which is approximately 196mA of current.