ACS108-6S STMicroelectronics, ACS108-6S Datasheet - Page 8

• Manufacturer Part Number: ACS108-6S
• Description: Overvoltage protected AC switch
• Manufacturer: STMicroelectronics

Alternating current line switch - basic application
2.1.2
8/15
Alternating current line transient voltage ruggedness
The ACS108-6S 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
is also used to test the ac switch according to the IEC 61000-4-5 standard conditions.
Thanks to the load limiting the current, the ACS108-6S 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 ACS108-6S breaks over safely as shown in
ACS108-6S 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 17. Effect of the switching off of a
Figure 19. Overvoltage ruggedness test
Surge generator
"1.2/50 waveform"
2.4 kV surge
loads with conditions equivalent to
100µs/div
Rgene
2
I
(5 mA/div)
OUT
1
IEC 61000-4-5 standards
I
H
high inductive load - typical
clamping capability of
ACS108-6S
circuit for resistive and
inductive
2
3
4
Model of the load
Figure 19
150
R
V
(200 V/div)
V
OUT
PEAK
5µH
5
Doc ID 11962 Rev 3
= V
L
CL
is representative of the final ACS108-6S application, and
ACS108-6Sx
Rg
220
Figure 18. Description of the different
Figure 20. Typical current and voltage
during IEC 61000-4-5 standard test
200ns/div
V
V
(200 V/div)
PEAK
OUT
steps during switching off of
a high inductive load
waveforms across the
ACS108-6S
I
I
I
I
OUT
OUT
H
H
5
5
Figure
2
2
1
1
3
3
20. The
I
(2 A/div)
OUT
4
4
ACS108-6S
V
V
CL
CL
V
V
OUT
OUT