NSPM1041B Datasheet, PDF (6/7 Pages) ON Semiconductor – Transient Voltage Suppressors

NSPM1041B
IEC 61000−4−2 Spec.
Level
First Peak
Test Volt- Current Current at
age (kV)
(A)
30 ns (A)
1
2
7.5
4
2
4
15
8
3
6
22.5
12
4
8
30
16
Current at
60 ns (A)
2
4
6
8
IEC61000−4−2 Waveform
I_peak
100%
90%
I @ 30 ns
I @ 60 ns
10%
Figure 10. IEC61000−4−2 Spec
t_P = 0.7 ns to 1 ns
ESD Gun
TVS
Oscilloscope
50 W
Cable
50 W
Figure 11. Diagram of ESD Test Setup
ESD Voltage Clamping
For sensitive circuit elements it is important to limit the
voltage that an IC will be exposed to during an ESD event
to as low a voltage as possible. The ESD clamping voltage
is the voltage drop across the ESD protection diode during
an ESD event per the IEC61000−4−2 waveform. Since the
IEC61000−4−2 was written as a pass/fail spec for larger
systems such as cell phones or laptop computers it is not
clearly defined in the spec how to specify a clamping voltage
at the device level. ON Semiconductor has developed a way
to examine the entire voltage waveform across the ESD
protection diode over the time domain of an ESD pulse in the
form of an oscilloscope screenshot, which can be found on
the datasheets for all ESD protection diodes. For more
information on how ON Semiconductor creates these
screenshots and how to interpret them please refer to
AND8307/D.
100
t_r
90
80
70
60
50
PEAK VALUE I_RSM @ 8 ms
PULSE WIDTH (t_P) IS DEFINED
AS THAT POINT WHERE THE
PEAK CURRENT DECAY = 8 ms
HALF VALUE I_RSM/2 @ 20 ms
40
30
t_P
20
10
0
0
20
40
60
80
t, TIME (ms)
Figure 12. 8 X 20 ms Pulse Waveform
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