ESD7104
www.onsemi.com
4
Figure 6. Positive TLP I−V Curve Figure 7. Negative TLP I−V Curve
VOLTAGE (V)
CURRENT (A)
VOLTAGE (V)
14121086420
0
2
4
6
8
10
12
14
16
16
18
20
18 20
0
−2
−4
−6
−8
−10
−12
−14
−16
−18
−20
22 24 −14−12−10−8−6−4−20 −16 −18 −20 −22 −
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
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
voltage over a range of current levels.
Figure 8. Simplified Schematic of a Typical TLP
System
DUT
L
S
÷
Oscilloscope
Attenuator
10 MW
V
C
V
M
I
M
50 W Coax
Cable
50 W Coax
Cable
Figure 9. Comparison Between 8 kV IEC 61000−4−2 and 8 A and 16 A TLP Waveforms
