How do you calculate zener voltage?
How do you calculate zener voltage?
The maximum current is calculated by dividing the power rating by the Zener voltage: I=P/V = 3W/12V = 0.25A. In this case, the datasheet specifies 250 mA as the maximum current, so the calculation wasn’t necessary.
What is a 5v1 zener diode?
This 1N4733A zener diode is set at 5.1V, making it ideal for protecting the inputs of a 5V circuit. specifically, it has a minimum voltage of 4.845 V and a maximum voltage of 5.355 V, with a leakage current of 1 V and a test current of 49 mA. Features: Voltage – Forward (Vf) (Max) @ If: 5.355VDC.
What is Zener used for?
Zener diodes are used for voltage regulation, as reference elements, surge suppressors, and in switching applications and clipper circuits. The load voltage equals breakdown voltage VZ of the diode. The series resistor limits the current through the diode and drops the excess voltage when the diode is conducting.
How is Zener diode value calculated?
The power rating of a Zener diode indicates the maximum power that the diode can safely dissipate. In the formula below, power equals the voltage multiplied by the current. IZM is the maximum current that can flow through the diode, and PZM is the diode’s maximum power dissipation, and VZ is the Zener voltage.
How do I choose a Zener diode?
Matching the Zener Diode and Resistor to the Situation
- Choose a Zener Diode. Since we need 8 Volts we can choose between a 7.5V or an 8.2V zener diode.
- Calculate the Maximum Current in the Circuit.
- Select the Power Rating of the Zener Diode.
- Select the Resisitor.
- Select the Power Rating of the Resisitor.
What is meant by zener voltage?
The voltage that is sufficient for the reverse breakdown condition thus allowing the diode to conduct in the reverse direction.
How does Zener diode works?
A Zener diode operates just like a normal diode when it is forward-biased. However, a small leakage current flows through the diode when connected in reverse biased mode. As the reverse voltage increases to the predetermined breakdown voltage (Vz), current starts flowing through the diode.
What is minimum power rating of 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.
How do you select a Zener diode?
When choosing the Zener diode voltage, it should be remembered that the emitter voltage will be lower than the Zener voltage by the amount of the base-emitter voltage – about 0.6 volts for a silicon transistor.
