ACST8-8CT [STMICROELECTRONICS]
OVER VOLTAGE PROTECTED AC POWER SWITCH; 过电压保护状态的AC电源开关
| 型号： | ACST8-8CT |
| 厂家： | 
ST |
| 描述： | OVER VOLTAGE PROTECTED AC POWER SWITCH |
| 文件： | 总10页 (文件大小：131K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ACST8
®
OVER VOLTAGE PROTECTED
AC POWER SWITCH
ASD™
(AC Switch Family)
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
OUT
G
G
OUT
COM
OUT
COM
TO-220FPAB
TO-220AB
FEATURES
ACST8-8CFP
ACST8-8CT
■
VDRM /VRRM = +/- 800V
■
■
Avalanche controlled device
OUT
IT(RMS) = 8A with TCASE = 90 °C
High noise immunity: static dV/dt > 750 V/µs
Gate triggering current : IGT < 30 mA
■
■
G
■
Snubberless turn off commutation:
(dI/dt)c > 4.5A/ms
COM
D2PAK
ACST8-8CG
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
Table 1: Order Codes
Part Number
ACST8-8CFP
ACST8-8CT
ACST8-8CG
Marking
ACST88C
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.
Figure 1: Functional Diagram
OUT
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.
G
COM
TM: ASD is a trademark of STMicroelectronics.
November 2004
REV. 6
1/10
ACST8
Table 2: Absolute Ratings (limiting values)
Symbol
Parameter
Value
Unit
TO-220FPAB
Tcase = 90°C
Tcase = 100°C
8
RMS on-state current full cycle sine
wave 50 to 60 Hz
IT(RMS)
A
TO-220AB /
D2PAK
8
tp = 20ms
tp = 16.7ms
tp = 10ms
80
85
35
A
A
A2s
Non repetitive surge peak on-state current
Tj initial = 25°C, full cycle sine wave
ITSM
I2t
Thermal constraint for fuse selection
Non repetitive on-state current critical rate of rise
IG = 10mA (tr < 100ns)
dI/dt
Rate period > 1mn
note 1
100
2
A/µs
kV
VPP
Tstg
Tj
Non repetitive line peak pulse voltage
Storage temperature range
- 40 to + 150 °C
- 40 to + 125 °C
Operating junction temperature range
Maximum lead soldering temperature during 10s
Tl
260
°C
Note 1: according to test described by IEC61000-4-5 standard & figure A.
Table 3: Gate Characteristics (maximum values)
Symbol
PG (AV)
PGM
Parameter
Average gate power dissipation
Value
Unit
W
0.1
10
1
Peak gate power dissipation (tp = 20µs)
Peak gate current (tp = 20µs)
W
IGM
A
Table 4: Thermal Resistance
Symbol
Parameter
Value
Unit
TO-220FPAB
TO-220AB
Rth(j-a)
Junction to ambient
60
°C/W
Rth(j-a)
Rth(j-c)
Junction to ambien (soldered on 1 cm2 copper pad) D2PAK
45
3.5
°C/W
°C/W
Junction to case for full cycle sine wave conduction TO-220FPAB
TO-220AB
Junction to case for full cycle sine wave conduction
D2PAK
Rth(j-c)
2.5
°C/W
Table 5: Parameter Description
Parameter Symbol
Parameter description
IGT
VGT
Gate triggering current
Gate triggering voltage
Non triggering voltage
Holding current
VGD
IH
IL
Latching current
VTM
On state voltage
VT0
On state characteristic threshold voltage
On state characteristic dynamic resistance
Forward or reverse leakage current
Static pin OUT voltage rise
Turn off current rate of decay
Avalanche voltage at turn off
Rd
I
DRM / IRRM
dV/dt
(dI/dt)c
VCL
2/10
ACST8
Table 6: Electrical Characteristics per Switch
For either positive or negative polary of pin OUT voltage respect to pin COM voltage
Symbol
VDRM
Test conditions
Values
Unit
/
Repetitive peak off-state voltage
MAX.
800
V
VRRM
IGT
VGT
VGD
IH
VOUT = 12V (DC) RL = 33Ω
VOUT = 12V (DC) RL = 33Ω
Tj = 25°C
Tj = 25°C
MAX.
MAX.
MIN.
30
1.5
0.2
40
mA
V
VOUT = VDRM
IOUT = 100mA
IG = 20mA
RL = 3.3kΩ
Tj = 125°C
Tj = 25°C
Tj = 25°C
Tj = 25°C
Tj = 125°C
Tj = 125°C
Tj = 25°C
Tj = 125°C
Tj = 125°C
Tj = 125°C
Tj = 25°C
V
Gate open
MAX.
MAX.
MAX.
MAX.
MAX.
MAX.
MAX.
MIN.
mA
mA
V
IL
70
VTM
VT0
Rd
IOUT = 11A
tp = 380µs
1.5
0.95
50
V
mΩ
µA
mA
V/µs
A/ms
V
10
IDRM
/
VOUT = VDRM
VOUT = VRRM
IRRM
1
dV/dt
V
OUT = 550V
gate open
tp = 1ms
750
4.5
1200
(dI/dt)c Without snubber
VCL ICL = 1mA
MIN.
TYP.
1. AC LINE SWITCH BASIC APPLICATION
The ACST8-8C device is especially designed to drive medium power induction motors in washing ma-
chines, refrigerators, dish washers, and tumble dryers.
Pin COM
Pin G
Pin OUT
: Common drive reference, to be connected to the power line neutral
: Switch Gate input to be connected to the controller
: Switch Output to be connected to the load
When driven from a low voltage controller, the ACST switch is triggered with a negative gate current flow-
ing out of the gate pin G. It can be driven by the controller through a resistor as shown on the typical appli-
cation diagram. In appliance systems, the ACST8-8C switch intends to drive medium power load in ON /
OFF full cycle or phase angle control mode.
Thanks to its thermal and turn-off commutation characteristics, the ACST8-8C switch is able to drive an
inductive load up to 8A without a turn-off aid snubber circuit.
In washing machine or drier appliances, the tumble rotates in both directions. When using bidirectional
phase shift induction motor, two switches are connected on each side of the phase shift capacitor: in
steady-state operation, one switch only conducts energising the coils and defining the tumble direction.
3/10
ACST8
Figure 2: Typical Application Diagram
OUT
G
COM
CONTROL
UNIT
2. ROBUSTNESS AGAINST FAST CAPACITOR DISCHARGE
When parasitic transients or controller mis-operation occur, the blocked switch may turn on by spurious
switch firing. Since the phase shift capacitor is charged, its energy is instantaneously dissipated through
the two ACSTs which can be destroyed. To prevent such a failure, a resistive inductive circuit R-L is added
in series with the phase shift capacitor.
The dI/dt depends on the maximal voltage Vmax of the phase shift capacitor (700V on 240V mains appli-
cations), and on the inductance L:
vmax
dl
dt
---- = ----------
L
The total switch turn on di/dt is the sum of the di/dt created by any RC noise suppressor discharge and
the dI/dt created by the motor capacitor discharge.
Since the maximal dI/dt capability at turn-on of the ACST8 is 100A/µs, the motor capacitor di/dt is assumed
to be less than 50A/µs; therefore, the inductance should be 14µH.
The resistor R limits the surge current through the ACST8 during the capacitor discharge according to the
specified curve ITSM = f (tp) as shown in figure 11 (to be issued), and 1.2Ω is low enough to limit the resistor
dissipation (usually less than 1 W).
Finally both the 14µH inductance and the 1.2Ω resistance provide a safety margin of two on the surge cur-
rent ITSM described in figure 11.
M
V
AC
Fast capacitor discharge when
one ACST switch turns on (T2)
and the motor runs (T1 ON).
C
L
R
700V
T1
ON
T2
4/10
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
L
R
OUT
SURGE VOLTAGE
AC LINE & GENERATOR
VAC + VPP
G
COM
Figure 4: Maximum power dissipation versus
RMS on-state current
Figure 5: RMS on-state current versus case
temperature
P(W)
I
(A)
T(RMS)
11
9
8
7
6
5
4
3
2
1
0
TO-220AB/D2PAK
α=180°
10
9
8
7
6
5
4
TO-220FPAB
3
180°
α
2
α
α=180°
1
T (°C)
C
I (A)
T(RMS)
0
0
25
50
75
100
125
0
1
2
3
4
5
6
7
8
Figure 6: RMS on-state current versus ambient
temperature
Figure 7: Relative variation of thermal
impedance versus pulse duration (TO-220FPAB)
K=[Z /R
]
th th
I
(A)
T(RMS)
1.E+00
1.E-01
1.E-02
1.E-03
3.0
2.5
2.0
1.5
1.0
0.5
0.0
α=180°
Printed circuit board FR4
Natural convection
Zth(j-c)
D2PAK
Zth(j-a)
TO-220FPAB/TO-220AB
TO-220FPAB
T
amb
(°C)
t (°C)
p
0
25
50
75
100
125
1.E-03
1.E-02
1.E-01
1.E+00
1.E+01
1.E+02
1.E+03
5/10
ACST8
Figure 8: Relative variation of thermal
impedance versus pulse duration (TO-220AB /
D2PAK)
Figure 9: On-state characteristics (maximum
values)
I (A)
out
K=[Z /R
]
th th
1.E+00
1.E-01
1.E-02
100
10
1
Zth(j-c)
Tj=25°C
Tj=125°C
Zth(j-a)
TO-220AB/D2PAK
Tj max. :
Vto = 0.95 V
Rd = 50 mΩ
t (°C)
p
t (°C)
p
1.E-03
1.E-02
1.E-01
1.E+00
1.E+01
1.E+02
1.E+03
0
1
2
3
4
5
6
Figure 10: Surge peak on-state current versus
number of cycles
Figure 11: Non repetitive surge peak on-state
current for a sinusoidal pulse with width tp <
10ms, and corresponding value of I2t
I (A)
TSM
I
(A), I2t (A2s)
TSM
90
80
70
60
50
40
30
20
10
0
1000
100
10
Tj initial=25°C
t=20ms
Non repetitive
Tj initial=25°C
dI/dt limitation:
100A/µs
ITSM
Repetitive
Tc=90°C
I2t
Number of cycles
t (ms)
p
1
10
100
1000
0.01
0.10
1.00
10.00
Figure 12: Relative variation of gate trigger
current, holding current and latching current
versus junction temperature (typical values)
Figure 13: Relative variation of critical rate of
decrease of main current versus reapplied dV/
dt (typical values)
I
, I ,I [T /I , I , I [T =25°C]
(dI/dt)c[(dV/dt)c] / Specified (dI/dt)c
GT
H
L
j
GT
H
L
j
3.0
2.5
2.0
1.5
1.0
0.5
0.0
5
4
3
2
1
IGT & IH
IL
T (°C)
j
dV/dt(V/µs)
0
-40 -30 -20 -10
0
10 20 30 40 50 60 70 80 90 100 110 120 130
0.1
1.0
10.0
100.0
6/10
ACST8
Figure 14: Relative variation of critical rate of
decrease of main current versus junction
temperature
Figure 15: Relative variation of static dV/dt
versus junction temperature
(dI/dt)c[T ] / (dI/dt)c[T =125°C]
j
j
dV/dt[T ] / dV/dt[T =125°C]
j j
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
6
5
4
3
2
1
0
Vout=550V
T (°C)
j
T (°C)
j
0
25
50
75
100
125
0
25
50
75
100
125
Figure 16: Surge peak on-state current versus
number of cycles
R (°C/W)
th(j-a)
80
70
60
50
40
30
20
10
0
S(Cu)(cm²)
0
5
10
15
20
25
30
35
40
Figure 17: Ordering Information Scheme
AC Switch
ACS T 8 - 8 C FP
Topology
T = Triac
RMS on-state current
8 = 8A
Repetitive peak off-state voltage
8 = 800V
Triggering gate current
C = 30mA
Package
FP = TO-220FPAB
CT = TO-220AB
CG = D2PAK
7/10
ACST8
Figure 18: TO-220AB Package Mechanical Data
DIMENSIONS
Millimeters Inches
Min. Min.
REF.
Max.
4.60
1.32
2.72
0.70
0.88
1.70
1.70
5.15
2.70
10.40
Max.
0.181
0.051
0.107
0.027
0.034
0.066
0.066
0.202
0.106
0.409
A
H2
A
B
D
E
F
F1
F2
G
G1
H2
L2
L4
L5
L6
L7
L9
M
4.40
1.23
2.40
0.49
0.61
1.14
1.14
4.95
2.40
10
0.173
0.048
0.094
0.019
0.024
0.044
0.044
0.194
0.094
0.393
Dia
C
L5
L9
L7
L6
L4
L2
F2
F1
D
F
16.4 typ.
0.645 typ.
M
G1
E
13
14
0.511
0.104
0.600
0.244
0.137
0.551
0.116
0.620
0.259
0.154
G
2.65
15.25
6.20
3.50
2.95
15.75
6.60
3.93
2.6 typ.
0.102 typ.
Diam.
3.75
3.85
0.147
0.151
Figure 19: TO-220FPAB Package Mechanical Data
DIMENSIONS
Millimeters Inches
REF.
Min.
4.4
2.5
Max.
4.6
2.7
2.75
0.70
1
1.70
1.70
5.20
2.7
Min.
Max.
0.181
0.106
0.108
0.027
0.039
0.067
0.067
0.205
0.106
0.409
A
A
B
D
E
F
F1
F2
G
G1
H
0.173
0.098
0.098
0.018
0.030
0.045
0.045
0.195
0.094
0.393
B
H
2.5
0.45
0.75
1.15
1.15
4.95
2.4
Dia
L6
L5
L2
L7
L3
10
10.4
D
L2
L3
L4
L5
L6
L7
Dia.
16 Typ.
0.63 Typ.
F1
F2
L4
28.6
9.8
2.9
30.6
10.6
3.6
1.126
0.386
0.114
0.626
0.354
0.118
1.205
0.417
0.142
0.646
0.366
0.126
F
E
G1
15.9
9.00
3.00
16.4
9.30
3.20
G
8/10
ACST8
Figure 20: D2PAK Package Mechanical Data
DIMENSIONS
Millimeters Inches
Min.
REF.
A
Max.
4.60
2.69
0.23
0.93
1.70
0.60
1.36
9.35
10.40
5.28
15.85
1.40
1.75
3.20
Min.
Max.
0.181
0.106
0.009
0.037
0.067
0.024
0.054
0.368
0.409
0.208
0.624
0.055
0.069
0.126
E
A
A1
A2
B
B2
C
C2
D
E
G
L
L2
L3
M
4.40
2.49
0.03
0.70
1.14
0.45
1.23
8.95
10.00
4.88
15.00
1.27
1.40
2.40
0.173
0.098
0.001
0.027
0.045
0.017
0.048
0.352
0.393
0.192
0.590
0.050
0.055
0.094
C2
L2
D
L
L3
A1
B2
R
C
B
G
A2
M
*
V2
* FLAT ZONE NO LESSTHAN 2mm
R
0.40 typ.
0.016 typ.
Figure 21: Foot Print Dimensions
(in millimeters)
16.90
10.30
5.08
1.30
3.70
8.90
Table 7: Ordering Information
Part Number
ACST8-8CFP
ACST8-8CT
Marking
Package
Weight
Base qty
50
Delivery mode
Tube
TO-220FPAB
TO-220AB
2.4 g
2.3 g
50
Tube
ACST88C
ACST8-8CG
50
Tube
D2PAK
1.5 g
ACST8-8CG-TR
500
Tape & reel
■
Epoxy meets UL94, V0
Table 8: Revision History
Date
Revision
Description of Changes
Jan-2002
4B
5
Last update.
TO-220AB and D2PAK packages added.
Table 6 page 3 : IGT parameter added
08-Nov-2004
24-Nov-2004
6
9/10
ACST8
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences
of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted
by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject
to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not
authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
The ST logo is a registered trademark of STMicroelectronics.
All other names are the property of their respective owners
© 2004 STMicroelectronics - All rights reserved
STMicroelectronics group of companies
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www.st.com
10/10
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