CDLL6312

Series:	--
Packaging:	Bulk
Part Status:	Active
Voltage - Zener (Nom) (Vz):	3.3V
Tolerance:	±5%
Power - Max:	500mW
Impedance (Max) (Zzt):	24 Ohms
Current - Reverse Leakage @ Vr:	5µA @ 1V
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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Diodes - Zener - Single

The CDLL6312 is a single Zener diode developed by Central Semiconductor Corporation. Its unique design makes it an ideal choice for applications such as voltage limiters, protection against transients and ESD protection. This article is going to discuss the application fields and working principle of theCDLL6312.

Applications

The CDLL6312 is designed to limit and regulate the voltage levels of circuits. It has been found to be particularly useful in areas such as automotive electronics, communications, LCD displays and test & measurement apparatus.In the automotive industry, the CDLL6312 is often used in edge termination and ESD-protected circuits. Its low capacitance structure and low radiation performance make it an optimal choice for protecting automotive electronics systems. In the communications field, the CDLL6312 is commonly used in combination with high power transistors, MOSFETs and CCTs (Controlled Capacitance Transistors) to provide discrete distortion-free protection for lightning transients and other external line transients. In LCD displays, the CDLL6312 is usually employed as a static guard clamp for ESD-sensitive video components and LCD driver ICs. The device offers excellent interference reduction and isolation from spurious noise, ensuring stable and reliable video performance. The CDLL6312 is also popular in test and measurement systems, where it can be used as a clamp and shunt device to accurately monitor the voltage levels in critical systems.

Working principle

The CDLL6312 is a Zener diode, which means that it has two distinct, resistively connected regions, one P-type and one N-type. This unique structure allows current to flow through the diode in one direction, while also allowing it to act as a resistor in the other direction.When a small reverse-biased voltage is applied to the CDLL6312, the P-type region will act as a resistor, allowing current to pass through. Once the reverse bias reaches a certain level, the resistor in the P-type region will become saturated, and current will no longer pass through. This is the point at which the device operates as a Zener diode. At this point, any further increase in reverse bias voltage will cause a significant current to flow through the device from the anode to the cathode, resulting in a voltage clamp. This voltage clamp is the threshold at which the CDLL6312 will limit the voltage and thus protect the circuit from overvoltage.

Conclusion

The CDLL6312 is a single Zener diode designed for a range of applications such as voltage limiters, ESD protection and transients protection. The device has a low capacitance structure and low radiation performance, making it an ideal choice for automotive and LCD applications. Furthermore, its unique structure allows it to act as a resistor in one direction and a Zener diode in the other, allowing it to accurately limit and regulate voltage levels.

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