ACST310-8B
Overvoltage protected AC switch
Datasheet production data
Description
287
The ACST310-8B belongs to the ACS™ / ACST
power switch family built with A.S.D.® (application
specific discrete) technology. This high
performance device is suited to home appliances
or industrial systems and drives loads up to 3 A.
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Features
AC switch with self over voltage protection
Microcontroller direct driven (low gate current
max. 10 mA)
This ACST310-8B switch embeds a Triac
structure with 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 standard.The component
needs a low gate current to be activated (IGT max.
10 mA) and still shows a high electrical noise
immunity complying with IEC standards such as
IEC 61000-4-4 (fast transient burst test).
Three quadrants (Q1, Q2 and Q3)
Figure 1. Functional diagram
UL94-V0 certified resin (flammability)
ECOPACK®2 compliant component
287
Benefits
Enables equipment to meet IEC61000-4-5
High immunity against fast transients
described in IEC61000-4-4 standard
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Needs no external overvoltage protection
High off-state reliability device
Interfaces directly with the microcontroller
– Reduces component count
Table 1. Device summary
Applications
AC static switching in appliances and industrial
control systems
Driving low power highly inductive loads or
resistive AC loads, such as motor control
circuits, small home appliances, lighting, fan
speed controllers, water valves, pumps, solid
state relays, vacuum cleaners, heaters
February 2017
This is information on a product in full production.
Symbol
Value
Unit
IT(RMS)
3
A
IGT(Q1, Q2, Q3)
10
mA
VDRM/VRRM
800
V
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®
: A.S.D., ECOPACK are registered trademarks
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Characteristics
1
ACST310-8B
Characteristics
Table 2. Absolute ratings (limiting values)
Symbol
IT(RMS)
ITSM
Parameter
Test conditions
Value
Unit
Tc = 112 °C
3
A
f = 50 Hz
tp = 20 ms
20
f = 60 Hz
tp = 16.7 ms
21
tp = 10 ms
2.6
A²s
Tj = 125 °C
50
A/µs
On-state RMS current (full sine wave)
Non repetitive surge peak on-state current
(Tj initial = 25 °C)
A
I2t
I2t value for fusing (Tj initial = 25 °C)
dI/dt
Critical rate of rise of on-state current
IG = 2 x IGT, tr 100 ns
VPP(1)
Non repetitive line peak mains voltage
Tj = 25 °C
2
kV
PG(AV)
Average gate power dissipation
Tj = 125 °C
0.1
W
f = 120 Hz
PGM
Peak gate power
tp = 20 µs
Tj = 125 °C
10
W
IGM
Peak gate current
tp = 20 µs
Tj = 125°C
1.6
A
Tstg
Storage junction temperature range
-40 to +150
°C
Tj
Operating junction temperature range
-40 to +125
°C
TL
Maximum lead temperature for soldering during 10 s
260
°C
1. according to test described by IEC 61000-4-5 standard (see Figure 18).
Table 3. Electrical characteristics
Symbol
IGT(1)
Test conditions
Quadrant
Tj
VOUT = 12 V, RL = 33
I - II - III
25 °C
VOUT = VDRM, RL = 3.3 k
I - II - III
Value
Unit
Max.
10
mA
Max.
1.1
V
125 °C
Min.
0.2
V
25 °C
Max.
20
mA
25 °C
Max.
VOUT = 67% VDRM, gate open
125 °C
Min.
1000
V/µs
(dV/dt)c = 0.1V/µs
125 °C
Min.
5
A/ms
(dI/dt)c(2) (dV/dt)c = 10 V/µs
125 °C
Min.
1
A/ms
25 °C
Min.
850
V
VGT
VGD
IH
(2)
IOUT = 100 mA
IL
dV/dt(2)
(2)
(dI/dt)c
VCL
I - III
IG = 1.2 x IGT
(2)
II
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
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25
35
mA
ACST310-8B
Characteristics
Table 4. Static characteristics
Symbol
Test conditions
Value
Unit
VTM(1)
ITM = 4.2 A, tp = 380 µs
Tj = 25 °C
Max.
1.8
V
VTO(1)
Threshold voltage
Tj = 125 °C
Max.
0.9
V
RD(1)
Dynamic resistance
Tj = 125 °C
Max.
200
m
IDRM
IRRM
VOUT = VDRM / VRRM
Tj = 25 °C
10
Max.
Tj = 125 °C
µA
500
1. For both polarities of OUT pin referenced to COM pin
Table 5. Thermal resistances
Symbol
Rth(j-c)
Rth(j-a)
Parameter
Junction to case (AC)
Junction to ambient
SCu
(1)=
0.5 cm²
Value
Unit
3
°C/W
70
°C/W
1. Scu = copper surface under tab
Figure 2. Maximum power dissipation versus
RMS on-state current (full cycle)
3:
Figure 3. On-state RMS current versus case
temperature
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Characteristics
ACST310-8B
Figure 4. On-state RMS current versus ambient
temperature (free air convection)
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Figure 5. Relative variation of thermal
impedance versus pulse duration
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Figure 6. Non repetitive surge peak on-state
current for a sinusoidal pulse with width:
tp < 10ms
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Figure 7. Surge peak on-state current versus
number of cycles
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ACST310-8B
Characteristics
Figure 8. Relative variation of holding current
Figure 9. Relative variation of gate trigger
and latching current versus junction
current and gate trigger voltage versus junction
temperature (typical values)
temperature (typical values)
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Figure 10. On-state characteristics
(maximum values)
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Figure 11. Relative variation of critical rate of
decrease of main current versus junction
temperature (typical values)
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Characteristics
ACST310-8B
Figure 12. Relative variation of static dV/dt
immunity versus junction temperature
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Figure 13. Relative variation of leakage current
versus junction temperature (typical values)
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Figure 14. Relative variation of critical rate of
decrease of main current versus reapplied
(dV/dt) (typical value)
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Figure 15. Relative variation of the maximal
clamping voltage versus junction temperature
(min. value)
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ACST310-8B
Application information
2
Application information
2.1
Typical application description
The ACST310-8B device has been designed to switch on and off, or by phase angle control,
highly inductive or resistive loads such as pump, valve, fan, or bulb lamps. Thanks to its
high sensitivity (IGT max = 10 mA), this device can be driven directly by logic level circuits
through a resistor as shown on the typical application diagram (Figure 16).
Figure 16. Typical application schematic
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Application information
ACST310-8B
Figure 17. Phase angle control typical diagram (inductive or resistive load)
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ACST310-8B
AC line transient voltage ruggedness
In comparison with standard Triacs, which are not robust against surge voltage, the
ACST310-8B is self-protected against over-voltage, specified by the parameter VCL. In
addition, the ACST310-8B is a sensitive device (IGT max. 10 mA), but provides a high noise
immunity level against fast transients. The ACST310-8B 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 18 represents the ACST310-8B application, and is used to stress
the ACST310-8B switch according to the IEC 61000-4-5 standard conditions. With the
additional effect of the load which is limiting the current, the ACST310-8B 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 ACST310-8B folds back safely to the on state as
shown in Figure 19. The ACST310-8B 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 18. Overvoltage ruggedness test circuit for resistive and inductive loads for
IEC 61000-4-5 standards
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2.2
Application information
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1. R = 30 Ω, L = 10 µH, Vpp = 2 kV (Surge Generator), Rg = 220 Ω, AC mains = 230 VRMS 50 Hz
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Application information
ACST310-8B
Figure 19. Typical voltage and current waveforms across the ACST310-8B
during IEC 61000-4-5 standard test
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2.3
Electrical noise immunity
The ACST310-8B is a sensitive device (IGT max. 10 mA) and can be controlled directly
through a simple resistor by a logic level circuit, and still provides a high electrical noise
immunity. The intrinsic immunity of the ACST310-8B is shown by the specified dV/dt equal
to 1000 V/μs at 125 °C. This immunity level is 5 to 10 times higher than the immunity
provided by an equivalent standard technology Triac with the same sensitivity. In other
words, the ACST310-8B with IGT = 10 mA has immunity comparable only for higher gate
current device (IGT higher than 35 mA).
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ACST310-8B
3
Package information
Package information
Epoxy meets UL94-V0
Lead-free package
Halogen free molding compound
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 status are available at: www.st.com.
ECOPACK® is an ST trademark.
3.1
DPAK package information
Figure 20. DPAK package outline
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Package information
ACST310-8B
Table 6. DPAK package mechanical data
Dimensions
Ref.
Inches(1)
Millimeters
Typ.
Min.
Max.
A
2.18
A1
Min.
Max.
2.40
0.0858
0.0945
0.90
1.10
0.0354
0.0433
A2
0.03
0.23
0.0012
0.0091
b
0.64
0.90
0.0252
0.0354
b4
4.95
5.46
0.1949
0.2150
c
0.46
0.61
0.0181
0.0240
c2
0.46
0.60
0.0181
0.0236
D
5.97
6.22
0.2350
0.2449
D1
4.95
5.60
0.1949
0.2205
E
6.35
6.73
0.2500
0.2650
E1
4.32
5.50
0.1701
0.2165
e
Typ.
2.286
0.09
e1
4.40
4.70
0.1732
0.1850
H
9.35
10.40
0.3681
0.4094
L
1.00
1.78
0.0394
0.0701
L2
1.27
0.0500
L4
0.60
1.02
0.0236
0.0402
V2
-8 °
+8 °
-8 °
+8 °
1. Inches only for reference
Figure 21. DPAK recommended footprint
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ACST310-8B
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Ordering information
Ordering information
Figure 22. Ordering information scheme
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Table 7. Ordering information
Order code
ACST310-8B
ACST310-8BTR
5
Marking
Package
Weight
ACST 3108
DPAK
0.32 g per pc.
Base qty.
Packing mode
75
Tube
2500
Tape and reel
Revision history
Table 8. Document revision history
Date
Revision
24-Feb-2017
1
Changes
Initial release.
DocID030200 Rev 1
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ACST310-8B
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