Key parameters to check when select a TVS electrostatic protection diodes?

Key parameters to check when select a TVS electrostatic protection diodes?

On the premise of choosing an ESD electrostatic protection diode, we must first understand its function and parameters. Where it is suitable for use and what kind of protection it plays is very important.

ESD Static Protection Diode Overview

ESD protection devices are used to protect sensitive circuits in electronic equipment from ESD (electrostatic discharge). ESD electrostatic protection diode is an overvoltage and anti-static protection component. ESD electrostatic protection is a common electronic electrostatic protection component in daily life. ESD electrostatic protection diode is an overvoltage, anti-static protection component, and it is a device designed for I/O port protection in high-speed data transmission applications. ESD protection diodes are used to protect sensitive circuits in electronic equipment from ESD (electrostatic discharge).

ESD low capacitance, the lowest can reach a few tenths of a picofarad;

●Fast response time: usually less than 1.0PS;

●Small size, miniaturized devices, saving PCB space;

●The working voltage can be designed according to the working voltage of the IC, such as: 2.8V, 3.3V, 5V, 7V, 15V and so on.

ESD Static Protection Diode Selection Guide

1) The cut-off voltage of the ESD electrostatic diode should be greater than the highest working voltage in the circuit;

2) The selection of the pulse peak current IPP and the maximum clamping voltage VC should be based on the maximum surge current that may appear on the line to select the appropriate IPP model. It should be noted that the VC at this time should be less than what the chip to be protected can withstand The maximum peak voltage received;

3) When used for signal transmission circuit protection, attention must be paid to the frequency or transmission rate of the transmitted signal. When the signal frequency or transmission rate is high, low-capacitance ESD electrostatic diodes should be selected;

4) Select the appropriate package according to the circuit design layout and the number of protected circuits. The size of the ESD package can reflect the protection level of the device to a certain extent. Generally, a device with a larger package can accommodate a larger ESD chip area and a higher protection level, and vice versa.