Suggestion for product selection of ESD electrostatic protection devices

Suggestion for product selection of ESD electrostatic protection devices:

1. When using ESD electrostatic protectors, they are connected in parallel to the protected circuit and should not have any impact on the operation of the circuit under normal circumstances;

2. Selection of breakdown voltage Vp: The breakdown voltage of the ESD diode should be greater than the maximum working voltage Um of the line or the maximum voltage value of the signal level;

3. Selection of pulse peak current IPP and maximum clamping voltage VC: When using ESD DIODES, the appropriate model of IPP should be selected based on the maximum surge current that may occur on the line. It should be noted that the maximum clamping voltage VC at this time should not be greater than the maximum peak voltage that the protected chip can withstand;

4. 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 pipes should be selected.