What parameters should be paid attention to when selecting TVS electrostatic protection diodes?

What parameters should be paid attention to when selecting TVS electrostatic protection diodes?

Before choosing ESD electrostatic protection diodes, we first need to understand their functions and parameters. Where it is suitable for use and what kind of protective effect it plays is crucial.

Overview of ESD Electrostatic Protection Diodes

ESD electrostatic protection diodes, are used to prevent sensitive circuits in electronic devices from being affected by ESD (electrostatic discharge). ESD electrostatic protection Diodes is a type of overvoltage and anti-static protection component, and ESD electrostatic protection is a common electronic electrostatic protection component in daily life. ESD static protection Diodes is an overvoltage and anti-static protection component designed for I/O port protection in high-speed data transmission applications. ESD electrostatic protection diodes are used to prevent sensitive circuits in electronic devices from being affected by ESD (electrostatic discharge).

Characteristics of ESD electrostatic protection diodes,

●Low capacitance, with a minimum of a few tenths of a decibel;

● Quick response time: usually less than 1.0PS;

●Small size, miniaturized devices, saving PCB space;

●The working voltage can be designed based on the working voltage of the IC, such as 2.8V, 3.3V, 5V, 7V, 15V, etc.

ESD electrostatic protection diodes,selection guide

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

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

3) When used for signal transmission circuit protection, it is necessary to pay attention to the frequency or transmission rate of the transmitted signal. When the signal frequency or transmission rate is high, low capacitance series  ESD electrostatic Diodes should be selected;

4) Select the appropriate packaging based on the circuit design layout and the number of protected circuits. The size of the ESD electrostatic protection diodes, package can to some extent reflect the protection level of the device. Generally, the larger the package, the larger the ESD chip area it can accommodate, and the higher the protection level, and vice versa.