ACS102-6T
2 AC line switch - basic application
Figure 14. Effect of the switching off of a high Figure 15. Description of the different steps
inductive load - typical clamping
capability of ACS102-6T
during switching off of a high
inductive load
4
I OUT
VPEAK = VCL
IOUT
1
(5 mA/div)
3
VOUT
(200 V/div)
3
2
I H
4
1
VOUT
5
IH
VCL
2
5
100µs/div
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 16. Overvoltage ruggedness test circuit Figure 17. Typical current and voltage
for resistive and inductive loads
with conditions equivalent to
IEC 61000-4-5 standards
waveforms across the ACS102-6T
during IEC 61000-4-5 standard test
VPEAK
I OUT
(2 A/div)
Surge generator
"1.2/50 waveform"
VOUT
Model of the load
Rgene
2
L
R
(200 V/div)
150
5µH
ACS102-6Tx
2.4 kV surge
Rg
220
200ns/div
7/11
STMICROELECTRONICS [ ST ]
