Application of TVS

Application of TVS

① Selection of pulse peak current IPP and maximum clamping voltage VC: When using TVS  tubes separately, the appropriate model of IPP should be selected based on the maximum surge current that may occur on the line. When TVS DIODE is used as the second level protection, 500W to 600W is generally sufficient. It should be noted that the maximum clamping voltage VC at this time should not be greater than the maximum surge voltage (safety voltage) that the protected equipment can withstand.

② When used for signal transmission circuit protection, it is important to pay attention to the frequency or transmission rate of the transmitted signal. When the signal frequency (transmission rate) is ≥ 10MHz (Mb/s), Cj should be ≤ 60pF; When the signal frequency (transmission rate) is ≥ 100MHz (Mb/s), Cj should be ≤ 20pF. When the signal frequency or transmission rate is high, low capacitance series pipes should be selected. When the low capacitance series still cannot meet the requirements, the TVStransistor should be connected to a bridge composed of fast recovery DIODE to reduce the total equivalent capacitance and increase the transmission signal frequency.