ACST8-8CT View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
ACST8-8CT Datasheet PDF : 10 Pages
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ACST8
3. AC LINE TRANSIENT VOLTAGE RUGGEDNESS
The ACST8-8C switch is able to safely withstand the AC line transient voltages either by clamping the low
energy spikes or by breaking over under high energy shocks.
The test circuit in figure 3 is representative of the ACST application and is used to test the ACST switch
according to the IEC61000-4-5 standard conditions. Thanks to the load impedance, the ACST switch with-
stands voltage spikes up to 2 kV above the peak line voltage by breaking over safely. Such non repetitive
testing can be done 10 times on each AC line voltage polarity.
Figure 3: Overvoltage ruggedness test circuit for resistive and inductive loads according to
IEC61000-4-5 standard R = 47Ω, L = 10µH & VPP = 2kV
R
L
SURGE VOLTAGE
AC LINE & GENERATOR
VAC + VPP
OUT
G
COM
Figure 4: Maximum power dissipation versus
RMS on-state current
P(W)
11
10
α=180°
9
8
7
6
5
4
3
180°
2
α
α
1
IT(RMS)(A)
0
0
1
2
3
4
5
6
7
8
Figure 6: RMS on-state current versus ambient
temperature
IT(RMS)(A)
3.0
2.5
D2PAK
2.0
1.5
TO-220FPAB/TO-220AB
1.0
0.5
0.0
0
25
Tamb(°C)
50
75
α=180°
Printed circuit board FR4
Natural convection
100
125
Figure 5: RMS on-state current versus case
temperature
IT(RMS)(A)
9
8
7
6
5
4
3
2
1
α=180°
0
0
25
TO-220FPAB
TO-220AB/D2PAK
TC(°C)
50
75
100
125
Figure 7: Relative variation of thermal
impedance versus pulse duration (TO-220FPAB)
K=[Zth/Rth]
1.E+00
Zth(j-c)
1.E-01
Zth(j-a)
1.E-02
1.E-03
1.E-03
1.E-02
tp(°C)
TO-220FPAB
1.E-01 1.E+00 1.E+01 1.E+02 1.E+03
5/10
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