ACST4 Просмотр технического описания (PDF) - STMicroelectronics
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ACST4 Datasheet PDF : 13 Pages
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ACST4
AC line transient voltage ruggedness
3
AC line transient voltage ruggedness
The ACST4 switch is able to sustain safely the AC line transient voltages 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 of the Figure 6. is representative of the final ACST application and is also
used to stress the ACST switch according to the IEC 61000-4-5 standard conditions. Thanks
to the load, the ACST switch sustains the voltage spikes up to 2 kV above the peak line
voltage. It will break over safely even on resistive load where the turn on current rate of rise,
is as high as shown on Figure 7. Such non-repetitive test can be done 10 times on each AC
line voltage polarity.
Figure 3.
Overvoltage ruggedness test
circuit for resistive and inductive
loads according to IEC 61000-4-5
standards.
R = 150 Ω, L = 10 µH, VPP = 2 kV.
Figure 4.
Current and voltage of the ACST4
during IEC 61000-4-5 standard test
with R, L and VPP.
SURGE VOLTAGE
AC LINE & GENERATOR
R
L
VAC + VPP
OUT
ACST4
COM
G
RG = 220Ω
Figure 5. Maximum power dissipation versus Figure 6. RMS on-state current versus case
RMS on-state current.
temperature.
P(W)
5.0
α=180°
4.5
IT(RMS)(A)
4.5
4.0
4.0
3.5
3.5
3.0
3.0
2.5
2.5
2.0
2.0
1.5
1.5
1.0
180°
α
1.0
α
0.5
0.5
IT(RMS)(A)
α=180°
0.0
0.0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
0
25
TO-220FPAB
DPAK
IPAK
Tc(°C)
50
75
100
125
5/13
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