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CDSOD323-T12C application field and working principle

TVS - Diodes are an essential element in many electronic systems, providing surge and ESD protection for data lines and sensitive components. CDSOD323-T12C is a unidirectional and low capacitance transient voltage suppressor diode array, which can be used in many different applications. In this article, we will discuss the application field and working principle of CDSOD323-T12C.

Application Fields of CDSOD323-T12C

CDSOD323-T12C is specially designed for providing Electrostatic Discharge (ESD) protection, Lightning and Surge transient protection, and creepage & clearance paths protection. It is made up of two integrated chips with two ESD protection diodes and one small signal diode. The two chips contain twelve TVS diode element and are electrically isolated. CDSOD323-T12C is designed to protect up to 8 data channels, and is a perfect solution for Ethernet ports as it contains two independent TVS arrays. It is able to protect against both ESD and Surge events during data communication on Ethernet ports.

CDSOD323-T12C is used for 12-channels I/O protection, in applications where I/O interface voltages range from 0-20V, and RoHS compliance is required. It could be used as a component in low-voltage compact equipment such as computer peripherals, medical instruments, and industrial and consumer electronic equipment. Meanwhile, it helps to reduce the risk of damage from over-voltage or over-power causes. It can also be used for testing and debugging microelectronic or semiconductor devices.

Working Principle of CDSOD323-T12C

The CDSOD323-T12C is designed with a breakdown voltage of about 5.7V and a stand-off voltage of 4V. It is a low capacitance TVS diode array with self-clamped voltage capability, active dynamic clamping, and low ground currents. The major components of CDSOD323-T12C include a Zener diode, a varactor diode (also called a voltage-dependent or capacitor diode), and a Thyristor (also known as a silicon-controlled rectifier or SCR).

When a voltage transient occurs, the Zener diode clamps the input voltage to the diode array breakdown voltage. The varactor diode helps to maintain the clamping voltage, and the Thyristor serves as a switch to quickly cut off the current when a voltage transient occurs. The combined actions of all the components help to protect the circuit against any voltage transients or surges that may occur.

CDSOD323-T12C also provides noise immunity by limiting the inductance of the current. The device is designed to operate in both high and low voltage situations. It is made with a range of components which provide protection from different levels of input voltage, current and voltage spikes. The device also has a low stand-off voltage that makes it easier to handle in low voltage situations.

CDSOD323-T12C is an ideal component for protecting against ESD and surge events. Its wide application field, low capacitance and high surge power rating make it an appropriate choice for many applications. The combination of self-clamping voltage capability, active dynamic clamping, and low voltages make it an effective form of protection.

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