CDLL5522B

Series:	--
Packaging:	Bulk
Part Status:	Active
Voltage - Zener (Nom) (Vz):	4.7V
Tolerance:	±5%
Power - Max:	500mW
Impedance (Max) (Zzt):	22 Ohms
Current - Reverse Leakage @ Vr:	2µA @ 2V
Voltage - Forward (Vf) (Max) @ If:	1.1V @ 200mA
Operating Temperature:	-65°C ~ 175°C
Mounting Type:	Surface Mount
Package / Case:	DO-213AB, MELF
Supplier Device Package:	DO-213AB

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CDLL5522B Application Field and Working Principle

Introduction

The CDLL5522B is a zener diode, a type of diode specifically designed to regulate voltage. This diode is a low power, surface-mount layer device with a maximum working voltage of 22V and peak pulsed current of 1A. It is rated for use at temperatures from -55°C to +150°C. Its uniform breakdown voltage characteristics, low reverse leakages and good precision makes it suitable for a variety of applications, from simple power supply regulation to implementing signal generators.

Working Principle

Zener diodes operate in a manner opposite to that of regular diodes. Instead of a high forward bias preventing current from flowing, a high reverse bias allows a current to flow. This current is known as the Zener current and it varies with the voltage applied. As the Zener current increases, so does the Zener voltage. The CDLL5522B diode operates in this manner.When in the reverse-bias configuration, the diode clips the voltage so the voltage seen at the diode\'s output is equal to the diode\'s rated Zener voltage. This allows regulation of the output voltage to within a tolerance value, as well as preventing any further current flow beyond the Zener current. By adding a resistor in series with the Zener diode, one can regulate both the Zener current and Zener voltage, allowing for greater control and stability.

Application Fields

The CDLL5522B diode is used in a wide range of applications due to its low power requirements and uniform breakdown voltage characteristics. It has found a place in both analog and digital circuits.The most common applications of the diode are in regulating power supplies. The diode can be used to regulate voltage to within the manufacturer-specified tolerance and to prevent surges. It can be used to protect circuits and components from reversed-polarity failures, as the diode will limit the current to a safe level.The stability of the Zener voltage makes the CDLL5522B a good choice for memory cells, digital-to-analog converters and differential amplifiers. The diode also finds use in oscillators and signal generators, where its stability over temperature makes it an ideal replacement for regular diodes and thermistors.

Conclusion

The CDLL5522B diode is a low-power surface mounted device with a maximum working voltage of 22V, peak pulsed current of 1A, and a temperature range from -55°C to +150°C. Its maximum breakdown voltage of 22 volts and its uniform Zener characteristics make it ideal for use in voltage regulation and signal generation. It can be used to protect circuits, stabilize memory cells, and regulate power supplies. The CDLL5522B is widely used in both analog and digital circuits.

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