When we encounter ESD static problems, usually in the only way sensitive signal lines or by increasing the external low-power static protection to discharge or ESD TVS tube selection mode. But often there are times when an engineer in the selection of low-power static protection and TVS tube selection, when engineers will not clear for some of their parameters, so sometimes can not quickly choose the appropriate protection devices.
ESD suppressors a polymer (POLYMER) material and a high voltage electrical molecular mutagenesis core material, which we call a low-power static protection polymer, the physical characteristics of the discharge is no age limit, the reaction rate <1ns, ultralow capacitance (<0.15pF), ultra-low leakage current (<1nA). Its main parameters are:
1, Reverse Stand off Voltage: Vr is a reverse voltage, non-conducting voltage represents only a small reverse leakage current at this voltage. This example TVS tube connected to the pins of the IC, as long as the selection time is less than the operating voltage of the IC voltage on the line.
2, Breakdown Voltage: breakdown voltage, TVS tube selection voltage when the test current IT through predetermined.
3, Maximum Clamping Voltage: maximum clamping voltage, TVS tube through selection of the peak current Ipp, TVS selection voltage across the tube.
. 4, the Maximum Pulse Peak Current: TVS tube Selection allowable peak current of 10 / 1000μs wave passing beyond which damage the TVS tube current selection.
5, Maximum Reverse Leakage: reverse leakage current, TVS tube selection leakage current in the reverse voltage. This parameter is the smaller the better.