1N747

Introduction to 1N747 Application Field and Working Principle

The 1N747 is a single Zener diode from the semiconductor industry. It is widely used in modern electronic engineering applications such as rectifiers, voltage regulation, protection circuits and voltage clampers. In this article, the application field, structure, and working principle of 1N747 will be discussed in detail.

Application Fields of 1N747

1N747 is a PN junction diode, mainly used to regulate and protect the circuit. Firstly, it can be used as a voltage regulator. The Zener diode can effectively reduce the amount of power lost in the circuit, that is, it can reduce the amount of power that is used up due to the presence of the load on the circuit. Secondly, it can also be used as a rectifier. The 1N747 can be connected to an AC source to supply direct current to the circuit. It can also be used as a protection device. By limiting the voltage to a certain level, the diode can protect the components from damage due to an excessive voltage spike. Lastly, the 1N747 can also be used in voltage clamping applications. The diode can clamp the voltage at the set value, and thus provide protection for the circuit from any sudden increase in voltage.

Structure of 1N747

The 1N747 is a PN junction diode. It is made up of two semiconductor layers, one of which is a heavily doped N-type layer, while the other is a lightly doped P-type layer. The PN junction between these two layers is the diode\'s rectifying region, which is responsible for the diode\'s rectified properties. This diode also has a vertical Zener voltage doping structure at the PN junction interface. When the reverse bias voltage on the diode exceeds the established vertical Zener voltages of the doping structure, the 1N747 can conduct electricity in the reverse direction, thus providing the voltage regulation and protection.

Working Principle of 1N747

When the voltage on the the 1N747 is below its Zener voltage, there is only a small current through the diode. This current is known as the leakage current. As the voltage reaches the Zener voltage, the diode enters into a highly conducting state and starts to conduct current in the reverse direction. This is known as the Zener breakdown effect. At the same time, the voltage on the junction is held to a constant value regardless of the applied reverse bias voltage. This is called the Zener voltage regulation effect.

Furthermore, when the applied reverse bias voltage is below the Zener voltage, current flows through the diode in the reverse direction. This current is known as the reverse current, and it is limited by the Zener resistance. As the voltage increases, the current also increases and reaches a certain saturation value. At this point, the diode starts to conduct and the voltage across it becomes stable.

Lastly, the 1N747 can also be used in voltage clamping applications. When a sudden spike in the reverse bias voltage occurs, the diode\'s Zener voltage and Zener resistance limit the voltage to the set value and thus, protect the circuit from unforeseen overloads.

Conclusion

In conclusion, 1N747 is a single Zener diode that is widely used in modern electronic applications such as rectifiers, voltage regulation, protection circuits and voltage clampers. It works on the principle of Zener breakdown and Zener voltage regulation. It is made up of two semiconductor layers, one of which is heavily doped, while the other is lightly doped. This diode can successfully reduce the amount of power lost in the circuit, that is, it can reduce the amount of power used up due to the presence of the load on the circuit. Moreover, it can also be used for protection and voltage clamping applications.