STMICROELECTRONICS ACST10

ACST10
Transient protected AC power switch
Features
OUT
■
Triac with overvoltage crowbar technology
■
Low IGT (<10 mA) or high immunity
(IGT<35 mA) version
■
High noise immunity: static dV/dt > 2000 V/µs
Benefits
■
Enables equipment to meet IEC 61000-4-5
■
High off-state reliability with planar technology
■
Need no external over voltage protection
■
Reduces the power passive component count
■
High immunity against fast transients
described in IEC 61000-4-4 standards
G
G
OUT
COM
OUT
COM
TO-220FPAB
ACST10-7xFT
TO-220AB
ACST10-7xT
Figure 1.
Functional diagram
OUT
Applications
■
AC mains static switching in appliance and
industrial control systems
■
Drive of medium power AC loads like:
– Universal drum motor of washing machine
– Compressor for fridge or air conditioner
Description
G
COM
Table 1.
The ACST10 series belongs to the ACS/ACST
family built with the ASD (application specific
discrete) technology. This high performance
device is adapted to home appliances or industrial
systems, and drives loads up to 10 A.
Device summary
Symbol
Value
Unit
IT(RMS)
10
A
VDRM/VRRM
700
V
IGT
10 or 35
mA
This ACST10 switch embeds a TRIAC structure
and a high voltage clamping device able to absorb
the inductive turn-off energy and withstand line
transients such as those described in the IEC
61000-4-5 standards. The ACST10-7S needs
only low gate current to be activated
(IGT < 10 mA) and still shows a high noise
immunity complying with IEC standards such as
IEC 61000-4-4 (Fast transient burst test). The
ACST10-7C offers an extremely high static dV/dt
immunity of 2 kV/µs minimum.
December 2008
Rev 1
1/12
www.st.com
Characteristics
ACST10
1
Characteristics
Table 2.
Absolute ratings (limiting values)
Symbol
IT(RMS)
ITSM
I2
t
Parameter
Unit
10
A
TO-220AB
Tc = 105 °C
TO-220FPAB
Tamb = 84 °C
F = 60 Hz
tp = 16.7 ms
105
A
F = 50 Hz
tp = 20 ms
100
A
tp = 10 ms
66
A2s
Tj = 125 °C
100
A/µs
On-state rms current (full sine wave)
Non repetitive surge peak on-state current
Tj initial = 25 °C, ( full cycle sine wave)
Value
2
I t for fuse selection
dI/dt
Critical rate of rise on-state current
IG = 2 x IGT, (tr ≤ 100 ns)
VPP
Non repetitive line peak pulse voltage (1)
Tj = 25 °C
2
kV
Average gate power dissipation
Tj = 125 °C
0.1
W
PGM
Peak gate power dissipation (tp = 20 µs)
Tj = 125 °C
10
W
IGM
Peak gate current (tp = 20 µs)
Tj = 125 °C
1
A
Tstg
Storage temperature range
-40 to +150
°C
Operating junction temperature range
-40 to +125
°C
PG(AV)
Tj
F = 120 Hz
1. According to test described in IEC 61000-4-5 standard and Figure 17
Table 3.
Electrical characteristics
Value
Symbol
Test conditions
Quadrant
Unit
Tj
ACST10-7Sx
ACST10-7Cx
10
35
IGT(1)
VOUT = 12 V, RL = 33 Ω
I - II - III
25 °C
MAX.
VGT
VOUT = 12 V, RL = 33 Ω
I - II - III
25 °C
MAX.
1.0
V
VGD
VOUT = VDRM, RL = 3.3 Ω
I - II - III
125 °C
MIN.
0.2
V
IH(2)
IOUT = 500 mA
25 °C
MAX.
30
50
mA
IL
IG = 1.2 x IGT
25 °C
MAX.
50
70
mA
125 °C
MIN.
200
2000
V/µs
125 °C
MIN.
I - II - III
dV/dt(2) VOUT = 67 % VDRM, gate open
(dI/dt)c(2)
(dV/dt)c = 15 V/µs
4.4
A/ms
Without snubber
VCL
ICL = 0.1 mA, tp = 1 ms
1. Minimum IGT is guaranteed at 5% of IGT max
2. For both polarities of OUT pin referenced to COM pin
2/12
mA
12
25 °C
MIN.
850
V
ACST10
Characteristics
Table 4.
Static characteristics
Symbol
Test conditions
Value
Unit
VTM(1)
IOUT = 14.1 A, tp = 500 µs
Tj = 25 °C
MAX.
1.5
V
VT0(1)
Threshold voltage
Tj = 125 °C
MAX.
0.9
V
Rd(1)
Dynamic resistance
Tj = 125 °C
MAX.
35
mΩ
IDRM
IRRM
Tj = 25 °C
MAX.
20
µA
VOUT = VDRM/ VRRM
Tj = 125 °C
MAX.
1.2
mA
Value
Unit
TO-220AB
1.7
°C/W
TO-220FPAB
3.5
°C/W
TO-220AB
TO-220FPAB
60
°C/W
1. For both polarities of OUT pin referenced to COM pin
Table 5.
Symbol
Thermal characteristics
Parameter
Rth(j-c)
Junction to case (AC)
Rth(j-a)
Junction to ambient
3/12
Characteristics
Figure 2.
ACST10
Maximum power dissipation vs.
rms on-state current (full cycle)
Figure 3.
P(W)
On-state rms current vs. case
temperature (full cycle)
IT(RMS)(A)
12
11
11
10
10
9
TO-220AB
9
TO-220FPAB
8
8
7
7
6
6
5
5
4
4
3
3
2
2
IT(RMS)(A)
1
TC(°C)
1
0
0
0
1
2
Figure 4.
3
4
5
6
7
8
9
10
0
25
On-state rms current vs. ambient
Figure 5.
temperature (free air convection full
cycle)
IT(RMS)(A)
1.0E+00
3,0
50
75
100
125
Relative variation of thermal
impedance vs. pulse duration
K=[Zth/Rth]
Zth(j-c)
TO -220AB
Zth(j-a)
2,5
TO-220FPAB
2,0
1,5
1.0E-01
1,0
TO-220AB
TO-220FPAB
0,5
Tamb(°C)
tp(s)
0,0
0
25
Figure 6.
50
75
100
125
On-state characteristics
(maximal values)
Figure 7.
ITM(A)
100
1.0E-02
1.0E-03
110
1.0E-02
1.0E-01
1.0E+00
1.0E+01
1.0E+02
1.0E+03
Non repetitive surge peak on-state
current vs. number of cycles
(Tj initial = 25 °C)
ITSM(A)
100
90
t=20ms
80
70
ITM (A)
One cycle
Non repetitive
Tj initial=25 °C
60
10
50
40
30
Tj=125 °C
20
Tj max :
Vto = 0.90 V
Rd = 35 mΩ
VTM(V)
Tj=25 °C
Number of cycles
0
1
0
4/12
Repetitive
TC=105 °C
10
1
2
3
4
5
1
10
100
ACST10
Characteristics
Figure 8.
10000
Non repetitive surge peak on-state Figure 9.
current for a sinusoidal pulse and
corresponding value of I²t
ITSM(A), I2t (A2s)
3.0
dI/dt limitation: 100 A/µs
Relative variation of gate triggering
current (IGT) and gate triggering
voltage vs. junction temperature
IGT, VGT,[Tj/IGT[Tj = 25 °C]
Tj initial=25 °C
IGTQ3
2.5
ITSM
1000
IGTQ1-Q2
2.0
100
1.5
I²t
VGTQ1-Q2-Q3
1.0
10
0.5
tp(ms)
Tj(°C)
1
0.01
0.10
1.00
10.00
Figure 10. Relative variation of holding (IH)
and latching current (IL) vs.
junction temperature
-25
0
25
50
75
100
125
Figure 11. Relative variation of critical rate of
decrease of main current (di/dt)c
vs. (dV/dt)c
IH,IL[TJ]/IH,IL[Tj = 25 °C]
2.5
0.0
-50
(di/dt)c [(dV/dt)c] / Specified (di/dt)c
1.6
1.4
2.0
1.2
Typical values
0.8
1.0
ACST10-7Sxx
0.6
0.4
IL
0.5
IH
0.2
TJ(°C)
0.0
-50
-25
0
25
50
75
100
125
Figure 12. Relative variation of critical rate of
decrease of main current (di/dt)c
vs. junction temperature
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
ACST10-7Cxx
1.0
1.5
(dV/dt)c (V/µs)
0.0
0.1
1
10
100
Figure 13. Relative variation of static dV/dt vs.
junction temperature
(dI/dt)c[Tj] / (dI/dt)c[Tj=125°C]
11
(dV/dt)[Tj] / (dV/dt)[Tj = 125 °C]
VD = VR = 460 V
10
9
8
7
6
5
4
3
2
25
50
Tj(°C)
1
Tj(°C)
75
100
125
0
25
50
75
100
125
5/12
Characteristics
ACST10
Figure 14. Relative variation of maximum clamping voltage, VCL vs. junction temperature
1.15
VCL[Tj] / VCL[Tj = 25 °C]
1.10
1.05
1.00
Minimum values
0.95
0.90
tj(°C)
0.85
-50
6/12
-25
0
25
50
75
100
125
ACST10
Application information
2
Application information
2.1
Typical application description
The ACST10 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
ACST10 switch is able to drive, with no turn off additional snubber, an inductive load up to
10 A. It also provides high thermal performances in static and transient modes such as the
compressor inrush current or high torque operating conditions of an AC motor. Thanks to its
low gate triggering current level, the ACST10-7S can be driven directly by an MCU through
a simple gate resistor as shown Figure 15.
Figure 15. Compressor control – typical diagram
Compressor
Compressor
AC Mains
AC Mains
PTC
2
ACST
ACST
logical circuitry
Start
switch
3
1
PTC
Electronic
starter
ACST
ACST
Run
switch
Electronic
thermostat
Rg
Rg
Power supply
Gate
Driver
Rg
Gate
Driver
Power supply
Figure 16. Universal drum motor control – typical diagram
Universal motor
Stator
Rotor
12V
AC Mains
Motor direction
setting
MCU
Speed motor
regulation
ACST
Rg
Vcc
MCU
7/12
Ordering information scheme
2.2
ACST10
AC line transient voltage ruggedness
In comparison with standard TRIACs, which are not robust against surge voltage, the
ACST10 is self-protected against over-voltage, specified by the new parameter VCL. The
ACST10 switch can safely withstand AC line transient voltages either by clamping the low
energy spikes 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 rises.
The test circuit of Figure 17 represents the ACST10 application, and is used to stress the
ACST switch according to the IEC 61000-4-5 standard conditions. Thanks to the load which
is limiting the current, the ACST switch withstands the voltage spikes up to 2 kV above the
peak line voltage. The protection is based on an overvoltage crowbar technology. The
ACST10 switches safely to the on state as shown in Figure 18. The ACST10 recovers its
blocking voltage capability after the surge. Such a non repetitive test can be done at least 10
times on each AC line voltage polarity.
Figure 17. Overvoltage ruggedness test circuit Figure 18. Typical current and voltage
for resistive and inductive loads for
waveforms across the ACST10
during IEC 61000-4-5 standard test
IEC 61000-4-5 standards
R = 8 Ω, L = 4 µH, Vsurge = 2 kV
VPEAK = V CL
Surge generator
2kV surge
VOUT
Rgene
IOUT
Model of the load
Filtering unit
R
L
L
ACST12
AC Mains
C
3
Rg
Ordering information scheme
Figure 19. Ordering information scheme
ACST 10 - 7 C T
AC Switch
On-state rms current
10 = 10A
Repetitive peak off-state voltage
7 = 700V
Triggering gate current
S = 10 mA
C = 35 mA
Package
FP = TO-220FPAB
T = TO-220AB
8/12
ACST10
4
Package information
Package information
●
Epoxy meets UL94, V0
●
Recommended torque: 0.4 to 0.6 N·m
In order to meet environmental requirements, ST offers these devices in ECOPACK®
packages. These packages have a lead-free second level interconnect. The category of
second level interconnect is marked on the package and on the inner box label, in
compliance with JEDEC Standard JESD97. The maximum ratings related to soldering
conditions are also marked on the inner box label. ECOPACK is an ST trademark.
ECOPACK specifications are available at www.st.com.
Table 6.
TO-220AB dimensions
Dimensions
Ref.
Dia
C
L5
L7
L6
L2
F2
D
L9
L4
Min.
Max.
Min.
Max.
A
4.40
4.60
0.173
0.181
C
1.23
1.32
0.048
0.051
D
2.40
2.72
0.094
0.107
E
0.49
0.70
0.019
0.027
F
0.61
0.88
0.024
0.034
F1
1.14
1.70
0.044
0.066
F2
1.14
1.70
0.044
0.066
G
4.95
5.15
0.194
0.202
G1
2.40
2.70
0.094
0.106
H2
10
10.40
0.393
0.409
L2
F
M
G1
Inches
A
H2
F1
Millimeters
16.4 typ.
0.645 typ.
L4
13
14
0.511
0.551
L5
2.65
2.95
0.104
0.116
L6
15.25
15.75
0.600
0.620
L7
6.20
6.60
0.244
0.259
L9
3.50
3.93
0.137
0.154
E
G
M
Diam.
2.6 typ.
3.75
3.85
0.102 typ.
0.147
0.151
9/12
Package information
Table 7.
ACST10
TO-220FPAB dimensions
Dimensions
Ref.
A
B
H
Dia
L6
L7
L2
L3
L5
F1
L4
F
G
10/12
Inches
Min.
Max.
Min.
Max.
A
4.4
4.6
0.173
0.181
B
2.5
2.7
0.098
0.106
D
2.5
2.75
0.098
0.108
E
0.45
0.70
0.018
0.027
F
0.75
1
0.030
0.039
F1
1.15
1.50
0.045
0.059
F2
1.15
1.50
0.045
0.059
G
4.95
5.20
0.195
0.205
G1
2.4
2.7
0.094
0.106
H
10
10.4
0.393
0.409
D
F2
G1
Millimeters
L2
E
16 Typ.
0.63 Typ.
L3
28.6
30.6
1.126
1.205
L4
9.8
10.6
0.386
0.417
L5
2.9
3.6
0.114
0.142
L6
15.9
16.4
0.626
0.646
L7
9.00
9.30
0.354
0.366
Diam.
3.00
3.20
0.118
0.126
ACST10
5
Ordering information
Ordering information
Table 8.
Ordering information
Order code
Marking
ACST10-7ST
Package
Weight
Base qty
Packing mode
TO-220AB
2.3 g
50
Tube
TO-220FPAB
2.3 g
50
Tube
TO-220AB
2.3 g
50
Tube
TO-220FPAB
2.3 g
50
Tube
ACST107S
ACST10-7SFP
ACST10-7CT
ACST107C
ACST10-7CFP
6
Revision history
Table 9.
Document revision history
Date
Revision
02-Dec-2008
1
Changes
First issue
11/12
ACST10
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