STMicroelectronics-ACST830-8FP
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ACST8
Datasheet
8 A – 800 V overvoltage protected AC switch
Features
OUT
•
•
•
Triac with overvoltage protection
High noise immunity: static dV/dt > 2000 V/μs
TO-220FPAB insulated package:
G
G
OUT
COM
OUT
COM
–
–
complies with UL standards (File ref : E81734)
insulation voltage: 2000 V
RMS
TO-220AB
TO-220FPAB
OUT
•
Benefits:
–
–
–
–
–
Enables equipment to meet IEC 61000-4-5
G
High off-state reliability with planar technology
Needs no external overvoltage protection
COM
D²PAK
Reduces the power passive component count
High immunity against fast transients described in IEC 61000-4-4 standards
OUT
Applications
•
•
AC mains static switching in appliance and industrial control systems
Drive of medium power AC loads such as:
G
–
–
Universal drum motor of washing machine
Compressor of fridge or air conditioner
COM
Product status link
Description
ACST8
The ACST8 series belongs to the ACS/ACST power switch family built around A.S.D.
(application specific discrete) technology. This high performance device is suited to
home appliances or industrial systems and drives an induction motor up to 8 A.
Product summary
I
8 A
This ACST8 switch embeds a Triac structure with a high voltage clamping device
to absorb the inductive turn-off energy and withstand line transients such as those
described in the IEC 61000-4-5 standards.
T(RMS)
V
/V
800 V
30 mA
DRM RRM
I
GT
ACST8 shows a high noise immunity complying with IEC standards such as IEC
61000-4-4 (fast transient burst test).
DS2106
–
Rev 11
–
September 2021
For further information contact your local STMicroelectronics sales office.
ACST8
Characteristics
1
Characteristics
Table 1.
Absolute ratings (limiting values)
Parameter
Symbol
Value
Unit
T =
91 °C
c
TO-220FPAB
8
On-state rms current (full sine
wave)
I
T =
105 °C
TO-220AB, D²PAK
D²PAK with 1 cm² copper
f = 50 Hz
A
T(RMS)
c
T
= 43 °C
2
amb
Non repetitive surge peak on-
state current
t =
20 ms
p
80
I
A
TSM
T initial
= 25 °C, (full cycle sine
j
t =
16.7 ms
p
f = 60 Hz
84
42
wave)
2
2
2
t =
10 ms
p
I t
I t
for fuse selection
A s
Critical rate of rise on-state
current
T =
125 °C
j
dI/dt
f = 120 Hz
100
A/μs
I
= 2 x I
, tr ≤ 100 ns
GT
G
(1)
T =
25 °C
V
P
Non repetitive line peak pulse voltage
Average gate power dissipation
2
0.1
kV
W
W
A
j
PP
T =
125 °C
j
G(AV)
P
Peak gate power dissipation (t
= 20 ms)
T =
125 °C
j
10
GM
p
I
Peak gate current (t
= 20 ms)
T =
125 °C
j
1.6
GM
p
T
Storage temperature range
-40 to +150
-40 to +125
260
°C
°C
°C
V
stg
T
Operating junction temperature range
j
T
Lead temperature for soldering during 10 s (at 3 mm from plastic case)
Insulation rms voltage (60 seconds) for TO-220FPAB
L
V
2000
ins
1. according
to test described by standard IEC 61000-4-5 standard and
Figure 17
Table 2.
Electrical characteristics per switch
Symbol
Test conditions
Quadrant
I – II – III
I – II – III
Value Unit
(1)
I
Max.
Max.
Min.
30
1.0
0.2
30
mA
V
GT
V
= 12
V
, R
=
3
3 Ω
L
OUT
V
GT
V
V
I
= V
, R
= 3.3 kΩ, T
= 125 °C
V
GD
OUT
DRM
L
j
(2)
= 500 mA
I
Max.
Max.
mA
mA
OUT
H
I
I =
1.2 x I
G GT
I – II – III
50
L
dV/dt
(2)
V
= 67% V
, gate open, T
= 125 °C
Min. 2000 V/µs
OUT
DRM
j
(dI/dt)c
(2)
Without snubber, T
= 125 °C
Min.
Min.
8
A/ms
V
j
V
I
= 0.1 mA, t
= 1 ms
CL p
850
CL
1. Minimum
I is
guaranteed at 5% of I
max
GT
GT
2. For
both polarities of OUT pin referenced to COM pin
DS2106
–
Rev 11
page 2/17
ACST8
Characteristics
Table 3.
Static characteristics
Test conditions
Symbol
Value Unit
(1)
V
I
= 11.3 A, t
= 500 μs
T =
25 °C
Max.
Max.
Max.
1.5
0.9
50
20
1
V
V
OUT
p
j
TM
(1)
V
T =
125 °C
j
Threshold voltage
Dynamic resistance
T0
(1)
R
T =
125 °C
j
mΩ
µA
mA
D
T =
25 °C
j
I
DRM
V
= V
/ V
DRM RRM
Max.
OUT
I
T =
125 °C
j
RRM
1. For
both polarities of OUT pin referenced to COM pin
Table 4.
Thermal characteristics
Symbol
Parameter
Value Unit
Junction to ambient
TO-220FPAB, TO-220AB
D²PAK
60
R
th(j-a)
th(j-c)
Junction to ambient (soldered on 1cm² copper pad)
45
°C/W
3.6
TO-220FPAB
R
Junction to case (AC)
TO-220AB, D²PAK
2
DS2106
–
Rev 11
page 3/17
ACST8
Characteristics (curves)
1.1
Characteristics (curves)
Figure 1.
Maximum power dissipation versus RMS on-
state current
Figure 2.
On-state RMS current versus case temperature
(full cycle)
I
T(RM
S
)
(A)
P(W)
10
9
180°
α =180°
α = 180°
TO-220AB
D²PAK
9
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
0
T
O
2
20FPAB
T
C
(°C)
I
(A)
T(RMS)
0
0
25
50
75
100
125
0
1
2
3
4
5
6
7
8
Figure 3.
On-state RMS current versus ambient
temperature (free air convection, full cycle)
Figure 4.
Relative variation of thermal impedance versus
pulse duration
K=[Z /R ]
th th
I
(A)
T(RMS)
1.0E+00
3.0
2.5
2.0
1.5
1.0
0.5
0.0
TO-220AB
Z
th(j-c)
α=180°
Z
th(j-a)
D
2
P
A
K
Copper surface
=
1cm
2
TO-220F
P
A
B
TO-220
1.0E-01
TO-220AB
TO-220F
P
A
B
1.0E+00
T
amb
(°C)
t (s)
p
1.0E-02
0
25
50
75
100
125
1.0E-03
1.0E-02
1.0E-01
1.0E+03
1.0E+01
1.0E+02
Figure 5.
Relative variation of gate trigger current
and gate trigger voltage versus junction temperature
(typical values)
Figure 6.
Relative variation of holding current
and latching current versus junction temperature
(typical values)
I
H
, I
L
[
T
j
] / I
H
, I
L
[
T
j
=25 °C]
I
GT
, V
GT
[
T
j
]
/
I
GT
, V
GT
[
T
j
=25 °C]
2.5
3.0
I
GT
Q3
T
y
pical values
2.0
1.5
1.0
0.5
0.0
2.5
2.0
1.5
1.0
0.5
0.0
I
GT
Q1-Q2
I
L
V
GT
Q1-Q2-Q3
I
H
T
j
(°C)
T
j
(°C)
-50
-25
0
25
50
75
100
125
-50
-25
0
25
50
75
100
125
DS2106
–
Rev 11
page 4/17
ACST8
Characteristics (curves)
Figure 7.
Surge peak on-state current versus number of
cycles
Figure 8.
Non repetitive surge peak on-state current for a
sinusoidal pulse width
TO-220AB and D²PAK
Number of cycles
Figure 10.
Relative variation of critical rate of decrease of
main current (dI/dt)c versus junction temperature
Figure 9.
On-state characteristics (maximum values)
I
TM
(A)
(dI/dt)c[T ]
/ (dI/dt)c[T
=125°C]
j
j
100
10
1
15
14
13
12
11
10
9
8
7
6
5
4
3
T
j
max :
V
to
= 0.90 V
R
d
= 50 mΩ
2
T
j
=125 °C
V
TM
(V)
T
j
=25 °C
1
T (°C)
j
0
0
1
2
3
4
5
25
50
75
100
125
Figure 11.
Relative variation of static dV/dt immunity
versus junction temperature (gate open)
Figure 12.
Relative variation of leakage current versus
junction temperature
I
DRM
/I
RRM
[T ;V
DRM /
V
RRM
]/I
DRM
/I
RR
M
[T =
125°C; 00V]
8
j
j
1.0E+00
1.0E-01
1.0E-02
1.0E-03
V
DRM
=V
RRM
=800 V
Different blocking voltages
V
DRM
=V
RRM
=600 V
V
DRM
=V
RRM
=200 V
T
j
(°C)
100
25
50
75
125
DS2106
–
Rev 11
page 5/17
ACST8
Characteristics (curves)
Figure 13.
Relative variation of the clamping voltage
versus junction temperature (minimum values)
Figure 14.
Thermal resistance junction to ambient versus
copper surface under tab (typical values)
V
CL
[T /V
CL
[Tj = 25°
C
]
R
th(j-a)
(°C/W)
80
j
1.15
1.10
1.05
1.00
0.95
0.90
0.85
D²PAK
70
Epoxy printed board FR4, copper thickness = 35 µm
60
50
40
30
20
10
T
j
(°C)
50
S
Cu
(cm²)
0
-50
-25
0
25
75
100
125
0
5
10
15
20
25
30
35
40
DS2106
–
Rev 11
page 6/17
ACST8
Application information
2
Application information
2.1
Typical application descriptions
The ACST8 device has been designed to control medium power load, such as AC motors in home appliances.
Thanks to its thermal and turn off commutation performances, the ACST8 switch is able to drive an inductive load
up to 8 A with no turn off additional snubber. It also provides high thermal performances in static and transient
modes such as high torque operating conditions or inrush current of an AC motor.
Figure 15.
AC induction motor control – typical diagram
AC Motor
AC
induction
motor
AC Mains
C
L
Phase shift capacitor +
protective air inductance
ACST
ACST
Rg
Rg
Selection of the
rotor direction
Vcc
MCU
DS2106
–
Rev 11
page 7/17
ACST8
AC line transient voltage ruggedness
2.2
AC line transient voltage ruggedness
In comparison with standard Triacs, which are not robust against surge voltage, the ACST8 is self-protected
against over-voltage, specified by the new parameter V
CL
. The ACST8 switch can safely withstand AC line
transient voltages either by clamping the low energy spikes, such as inductive spikes at switch off, or by switching
to the on state (for less than 10 ms) to dissipate higher energy shocks through the load. This safety feature works
even with high turn-on current ramp up.
The test circuit of
Figure 17
represents the ACST8 application, and is used to stress the ACST switch according
to the IEC 61000-4-5 standard conditions. With the additional effect of the load which is limiting the current, the
ACST switch withstands the voltage spikes up to 2 kV on top of the peak line voltage. The protection is based
on an overvoltage crowbar technology. The ACST8 folds back safely to the on state as shown in
Figure 18
. The
ACST4 recovers its blocking voltage capability after the surge and the next zero current crossing.
Such a non repetitive test can be done at least 10 times on each AC line voltage polarity.
Figure 16.
Overvoltage ruggedness test circuit for resistive and inductive loads for IEC 61000-4-5
standards
R = 13 Ω, L = 2 µH, Vsurge = 2 kV
Rg = 82
Ω
Surge generator
2kV surge
Rgene
Model of the load
Filtering unit
L
R
ACST8
AC Mains
Rg
Figure 17.
Typical voltage and current waveforms across the ACST8 during IEC 61000-4-5 standard test
V
= V
CL
peak
1.2/50 µs voltage surge
V
0
0
I
peak
I
= 160A
8/20 µs current surge
dI/dt = 180 A/µs
DS2106
–
Rev 11
page 8/17
ACST8
Package information
3
Package information
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK
packages,
depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product
3.1
TO-220AB package information
•
•
•
•
•
Molding compouned resin is halogen free and meets UL94 flammability standard, level V0
Lead-free package leads plating
Cooling method: by conduction (C)
Recommended torque value: 0.55 N·m
Maximum torque value: 0.70 N·m
Figure 18.
TO-220AB package outline
DS2106
–
Rev 11
page 9/17
ACST8
TO-220AB package information
Table 5.
TO-220AB package mechanical data
Dimensions
Millimeters
Ref.
Inches (for reference only)
Min.
4.40
0.61
1.14
0.48
15.25
Max.
4.60
0.88
1.55
0.70
15.75
Min.
Max.
A
b
0.1732
0.0240
0.0449
0.0189
0.6004
0.1811
0.0346
0.0610
0.0276
0.6201
b1
c
D
D1
E
1.27 typ.
0.0500 typ.
10.00
2.40
4.95
1.23
6.20
2.40
13.00
3.50
10.40
2.70
5.15
1.32
6.60
2.72
14.00
3.93
0.3937
0.0945
0.1949
0.0484
0.2441
0.0945
0.5118
0.1378
0.4094
0.1063
0.2028
0.0520
0.2598
0.1071
0.5512
0.1547
e
e1
F
H1
J1
L
L1
L20
L30
θP
Q
16.40 typ.
28.90 typ.
0.6457 typ.
1.1378 typ.
3.75
2.65
3.85
2.95
0.1476
0.1043
0.1516
0.1161
DS2106
–
Rev 11
page 10/17
ACST8
TO-220FPAB package information
3.2
TO-220FPAB package information
•
Epoxy meets UL94, V0
•
Recommended torque: 0.4 to 0.6 N·m
Figure 19.
TO-220FPAB package outline
DS2106
–
Rev 11
page 11/17
ACST8
TO-220FPAB package information
Table 6.
TO-220FPAB package mechanical data
Dimensions
Millimeters
Ref.
Inches
Max.
Min.
4.40
2.5
Max.
4.60
2.7
Min.
A
B
0.1739
0.0988
0.0988
0.0178
0.0296
0.0455
0.0455
0.1957
0.0949
0.3953
0.1818
0.1067
0.1087
0.0277
0.0395
0.0672
0.0672
0.2055
0.1067
0.4111
0.6324 typ.
1.2095
0.4190
0.1423
0.6482
0.3676
0.1265
D
2.50
0.45
0.75
1.15
1.15
4.95
2.40
10.00
2.75
0.70
1.0
E
F
F1
F2
G
1.70
1.70
5.20
2.70
10.40
G1
H
L2
L3
L4
L5
L6
L7
Dia
16.00 typ.
28.60
9.80
2.90
15.90
9.00
3.0
30.60
10.6
3.60
16.40
9.30
3.20
1.1304
0.3874
0.1146
0.6285
0.3557
0.1186
DS2106
–
Rev 11
page 12/17
ACST8
D²PAK package information
3.3
D²PAK package information
•
Epoxy meets UL94, V0.
•
Cooling method: by conduction (C)
Figure 20.
D²PAK package outline
Note:
This package drawing may slightly differ from the physical package. However, all the specified dimensions are
guaranteed.
DS2106
–
Rev 11
page 13/17
ACST8
D²PAK package information
Table 7.
D²PAK package mechanical data
Dimensions
Millimeters
Ref.
Inches (for reference only)
Min.
4.40
0.03
0.70
1.14
0.45
1.23
8.95
7.50
1.10
10.00
8.30
6.85
Typ.
Max.
4.60
0.23
0.93
1.70
0.60
1.36
9.35
8.00
1.50
10.40
8.70
7.25
Min.
Typ.
Max.
0.181
0.009
0.037
0.067
0.024
0.053
0.368
0.315
0.060
0.409
0.346
0.282
A
A1
b
0.173
0.001
0.028
0.045
0.018
0.048
0.352
0.295
0.043
0.394
0.335
0.266
b2
c
c2
D
D1
D2
E
7.75
1.30
0.305
0.051
E1
E2
e
8.50
7.05
2.54
0.343
0.278
0.100
e1
H
4.88
15.00
2.49
2.29
1.27
1.30
5.28
15.85
2.69
2.79
1.40
1.75
0.190
0.591
0.097
0.090
0.049
0.050
0.205
0.624
0.106
0.110
0.055
0.069
J1
L
L1
L2
R
0.40
0.015
V2
0°
8°
0°
8°
Figure 21.
D²PAK recommended footprint (dimensions are in mm)
12.2
9.75
16.9
3.5
1.6
2.54
5.08
DS2106
–
Rev 11
page 14/17
ACST8
Ordering information
4
Ordering information
Figure 22.
Ordering information scheme
ACS T
8 30 – 8
G TR
ACswitch
Topology
T =
T
r
iac
On-state RMS current
8 = 8 A
Triggering gate current
30 = 30 mA
Repetitive peak off-state voltage
8 = 800V
Package
FP = TO-220F
P
A
B
T =
TO-220AB
G =
D²PAK
Delivery mode
TR =
T
a
pe and reel
Blank =
T
u
be
Table 8.
Ordering information
Order code
Marking
Package
TO-220FPAB
TO-220AB
D²PAK
Weight
2.4 g
Base qty.
50
Packing mode
Tube
ACST830-8FP
ACST830-8T
ACST8308
2.3 g
50
Tube
ACST830-8GTR
1.5 g
1000
T
a
pe and reel
DS2106
–
Rev 11
page 15/17
ACST8
Revision history
Table 9.
Document revision history
Date
Revision
Changes
Jan-2002
4B
5
Last update.
08-Nov-2004
24-Nov-2004
TO-220AB and D²PAK packages added.
T
a
ble 6 page 3: I
parameter added.
6
GT
Added ECOPACK statement. Reformatted for consistency with other
datasheets in this product class. Order codes updated.
18-Dec-2009
7
01-Jul-2010
07-Feb-2011
8
9
Updated Figure 19.
Updated
T
a
ble 2.
Updated features in cover page and
T
a
ble 2.
Updated Section 4: Package information.
Minor text changes.
04-Sep-2017
29-Sep-2021
10
11
Updated D²PAK package information.
DS2106
–
Rev 11
page 16/17
ACST8
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.
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DS2106
–
Rev 11
page 17/17
