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Número de pieza | ACST8 | |
Descripción | OVER VOLTAGE PROTECTED AC POWER SWITCH | |
Fabricantes | STMicroelectronics | |
Logotipo | ||
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ASD™
(AC Switch Family)
ACST8
OVER VOLTAGE PROTECTED
AC POWER SWITCH
MAIN APPLICATIONS
■ AC static switching in appliance & industrial
control systems
■ Washing machine with bi-rotational induction
motor drive
■ Induction motor drive for:
- refrigerator / freezer compressor
- air conditioning compressor
FEATURES
■ VDRM /VRRM = +/- 800V
■ Avalanche controlled device
■ IT(RMS) = 8A with TCASE = 90 °C
■ High noise immunity: static dV/dt > 750 V/µs
■ Gate triggering current : IGT < 30 mA
■ Snubberless turn off commutation:
(dI/dt)c > 4.5A/ms
BENEFITS
■ Enables equipment to meet EN61000-4-5
standard
■ High off-state reliability with planar technology
■ Need no external overvoltage protection
■ Reduces the power component count
DESCRIPTION
The ACST8-8C belongs to the AC power switch
family built around the ASDTM technology. This
high performance device is adapted to home appli-
ances or industrial systems and drives an induc-
tion motor up to 8A.
This ACST switch embeds a triac structure with a
high voltage clamping device to absorb the induc-
tive turn off energy and withstand line transients
such as those described in the IEC61000-4-5
standards.
OUT
G
OUT
COM
TO-220FPAB
ACST8-8CFP
OUT
G
OUT
COM
TO-220AB
ACST8-8CT
G
COM
D2PAK
ACST8-8CG
Table 1: Order Codes
Part Number
ACST8-8CFP
ACST8-8CT
ACST8-8CG
Marking
ACST88C
Figure 1: Functional Diagram
OUT
G
COM
TM: ASD is a trademark of STMicroelectronics.
November 2004
REV. 6
1/10
1 page 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
RL
SURGE VOLTAGE
AC LINE & GENERATOR
VAC + VPP
OUT
COM
G
Figure 4: Maximum power dissipation versus
RMS on-state current
P(W)
11
10 α=180°
9
8
7
6
5
4
3 180°
2α
α
1 IT(RMS)(A)
0
012345678
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
5 Page |
Páginas | Total 10 Páginas | |
PDF Descargar | [ Datasheet ACST8.PDF ] |
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