Transcription of AND8229/D An Introduction to Transient Voltage …
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Semiconductor Components Industries, LLC, 2005 July, 2005 Rev. 01 Publication Order Number:AND8229/DAND8229/DAn Introduction toTransient VoltageSuppression DevicesPrepared by: Jim LepkowskiON SemiconductorINTRODUCTIONT ransient Voltage Suppression (TVS) protection devicessuch as shielded cables, crowbars, filters and clampingdevices have been widely used for a number of years to solveEMI problems. These TVS devices can be used to achievehigher EMI higher immunity levels without significantlyadding to the cost and complexity of the circuit. Theattributes of traditional TVS devices will be compared to thefeatures of a relatively new option, the avalanche diode TVSEMI filter. Recent advancements in IC manufacturingtechnology provide the TVS diode with several technicaland cost advantages compared to traditional EMI surge voltages are a major cause of poorreliability.
AND8229/D http://onsemi.com 3 Crowbar TVS Devices Spark gaps, gas discharge tubes (GDTs), thyristors and thyristor surge protective devices (TSPDs) are TVS devices
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