ACS102-6T AC line switch - basic application
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2.1.2 AC line transient voltage ruggedness
The ACS102-6T switch is able to withstand safely the AC line transients either by clamping
the low energy spikes or by breaking over under high energy shocks, even with high turn-on
current rises.
The test circuit shown in Figure 16 is representative of the final ACS102-6T application, and
is also used to test the ACS switch according to the IEC 61000-4-5 standard conditions.
Thanks to the load limiting the current, the ACS102-6T switch withstands the voltage spikes
up to 2 kV above the peak line voltage. The protection is based on an overvoltage crowbar
technology. Actually, the ACS102-6T breaks over safely as shown in Figure 17. The
ACS102-6T recovers its blocking voltage capability after the surge (switch off back at the
next zero crossing of the current).
Such non-repetitive tests can be done 10 times on each AC line voltage polarity.
Figure 14. Effect of the switching off of a high
inductive load - typical clamping
capability of ACS102-6T
Figure 15. Description of the different steps
during switching off of a high
inductive load
1
2
3
4
5
I
H
I
(5 mA/div)
OUT
V
PEAK
=V
CL
V
(200 V/div)
OUT
100µs/div
I
H
V
CL
V
OUT
I
OUT
1
2
3
4
5
I
H
V
CL
V
OUT
I
OUT
1
2
3
4
5
Figure 16. Overvoltage ruggedness test circuit
for resistive and inductive loads
with conditions equivalent to
IEC 61000-4-5 standards
Figure 17. Typical current and voltage
waveforms across the ACS102-6T
during IEC 61000-4-5 standard test
2.4 kV surge
Surge generator
"1.2/50 waveform"
Rg
220
ACS102-6Tx
Rgene
2
L
5µH
R
150
Model of the load
I
(2 A/div)
OUT
V
PEAK
V
(200 V/div)
OUT
200ns/div
