Equivalent Circuit Parameter Estimation and Application of TVS Electrostatic Discharge Suppressor

A parameter estimation method of TVS(Transient Voltage Suppressor) diode’ equivalent circuit model was proposed for electrostatic discharge(ESD) protection.Based on the physical mechanism of semiconductor device,the TVS model was built by considering the junction potential,breakdown voltage,junction capacitor of PN junction,body resistor,parasitic inductance and capacitance of packaging.The test platform of 50 high speed system was built for ESD waveform measurement.The TVS model is validated by comparing the results of circuit simulation and experimental measurement for ESD protection.Furthermore,simulation and measurement show that the serial resistor,packaging inductance are the main factors to decreasing the magnitude of first spike.At last,the suppression effectiveness of ESD pulse was predicted with the proposed TVS model at the analog port of protection and control equipment in UHV substation.