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ESD7004, SZESD7004
22
20
18
16
14
12
10
8
6
4
2
0
? 22
? 20
? 18
? 16
? 14
? 12
? 10
? 8
? 6
? 4
? 2
0
0
2
4
6
8 10 12
14
16
18
20
0
? 2
? 4
? 6
? 8
? 10 ? 12 ? 14 ? 16 ? 18 ? 20
VOLTAGE (V)
Figure 6. Positive TLP I ? V Curve
VOLTAGE (V)
Figure 7. Negative TLP I ? V Curve
Transmission Line Pulse (TLP) Measurement
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 8. TLP I ? V curves of ESD
protection devices accurately demonstrate the product’s
ESD capability because the 10s of amps current levels and
L
50 W Coax
Cable
10 M W
V C
S Attenuator
÷
I M
50 W Coax
Cable
V M
DUT
under 100 ns time scale match those of an ESD event. This
is illustrated in Figure 9 where an 8 kV IEC 61000 ? 4 ? 2
current waveform is compared with TLP current pulses at
8 A and 16 A. A TLP I ? V curve shows the voltage at which
the device turns on as well as how well the device clamps
Oscilloscope
Figure 8. Simplified Schematic of a Typical TLP
System
voltage over a range of current levels. A typical TLP I ? V
curve for the ESD7004 is shown in Figures 6 and 7.
Figure 9. Comparison Between 8 kV IEC 61000 ? 4 ? 2 and 8 A and 16 A TLP Waveforms
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