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EMI8143 Datasheet(PDF) 5 Page - ON Semiconductor |
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EMI8143 Datasheet(HTML) 5 Page - ON Semiconductor |
5 / 9 page EMI8141, EMI8142, EMI8143 http://onsemi.com 5 TRANSMISSION LINE PULSE (TLP) MEASUREMENTS Transmission Line Pulse (TLP) provides current versus voltage (I−V) curves in which each data point is obtained from a 100 ns long rectangular pulse from a charged transmission line. A simplified schematic of a typical TLP system is shown in Figure 4. TLP I−V curves of ESD protection devices accurately demonstrate the product’s ESD capability because the 10 s of amps current levels and under 100 ns time scale match those of an ESD event. This is illustrated in Figure 5 where an 8 kV IEC61000−4−2 current waveform is compared with TLP current pulses at 8 A and 16 A. A TLP curve shows the voltage at which the device turns on as well as how well the device clamps voltage over a range of current levels. Typical TLP I−V curves for the EMI814x are shown in Figure 4. L SW 50 W Coax Cable 10 MQ VC Attenuator ÷ IM 50 W Coax Cable VM DUT Oscilloscope Figure 4. Simplified Schematic of a Typical TLP System Figure 5. Comparison Between 8 kV IEC6100 0-4-2 and 8 A and 16 A TLP Waveforms 18 16 14 12 10 8 6 4 2 0 02 18 16 14 12 46 8 10 Vclamp (V) 0 −2 −18 −14 −12 −4 −6 −8 −10 Vclamp (V) −18 −16 −14 −12 −10 −8 −6 −4 −2 0 Figure 6. Positive and Negative TLP Waveforms −16 |
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