ACS108-6SA
Datasheet
0.8 A - 600 V overvoltage protected AC switch (ACS™)
Features
•
•
•
•
G
OUT
COM
•
TO-92
•
OUT
Applications
•
G
COM
OUT
G
Enables equipment to meet IEC 61000-4-5 surge with overvoltage crowbar
technology
High noise immunity against static dV/dt and IEC 61000-4-4 burst
Needs no external protection snubber or varistor
Reduces component count by up to 80% and Interfaces directly with the microcontroller
Common package tab connection supports connection of several alternating
current switches on the same cooling pad
VCL gives headroom before clamping then crowbar action
•
COM
Common drive reference to connect
to the mains
Output to connect to the load.
Gate input to connect to the controller
through gate resistor
Product status link
ACS108-6SA
Product summary
IT(RMS)
0.8 A
VDRM, VRRM
600 V
IGT
10 mA
Alternating current on/off static switching in appliances and industrial control
systems
Driving low power high inductive or resistive loads like:
–
relay, valve, solenoid, dispenser
–
pump, fan, low power motor, door lock, air flow dumper
–
lamp
Description
The ACS108-6SA belongs to the AC switch range (built with A. S. D.® technology).
This high performance switch can control a load of up to 0.8 A.
This device switch includes an overvoltage crowbar structure to absorb the inductive
turn-off energy, and a gate level shifter driver to separate the digital controller from
the main switch. It is triggered with a negative gate current flowing out of the gate pin.
Note:
®: A.S.D. is a registered trademark of STMicroelectronics
Note:
TM: ACS is a trademark of STMicroelectronics
DS1641 - Rev 6 - February 2019
For further information contact your local STMicroelectronics sales office.
www.st.com
ACS108-6SA
Characteristics
1
Characteristics
Table 1. Absolute maximum ratings (Tamb = 25 °C, unless otherwise specified)
Symbol
Parameter
IT(RMS)
Value
Tamb = 64 °C
0.45
Tlead = 76 °C
0.8
tp = 20 ms
13
tp = 16.7 ms
13.7
tp = 10 ms
1.1
A2s
f = 120 Hz, Tj = 125 °C
100
A/μs
2
kV
On-state rms current (full sine wave), S = 5cm²
Non repetitive surge peak on-state current
Tj initial = 25 °C, (full cycle sine wave)
ITSM
I2t
I2t for fuse selection
Critical rate of rise on-state current IG = 2 x IGT, tr ≤ 100 ns
dI/dt
(1)
Unit
A
A
VPP
Non repetitive line peak pulse voltage
PG(AV)
Average gate power dissipation
Tj = 125 °C
0.1
W
VGM
Peak positive gate voltage
Tj = 125 °C
10
V
IGM
Peak gate current (tp = 20 μs)
Tj = 125 °C
1
A
Tstg
Storage temperature range
-40 to +150
°C
Operating junction temperature range
-30 to +125
°C
Tj
1. according to test described by standard IEC 61000-4-5, see Figure 15. Overvoltage ruggedness test circuit for resistive and
inductive loads, Tamb = 25 °C (conditions equivalent to IEC 61000-4-5 standard) for conditions
Table 2. Electrical characteristics (Tj = 25 °C, unless otherwise specified)
Symbol
IGT (1)
VGT
VGD
Test conditions
Quadrant
VOUT = 12 V, RL = 33 Ω
II - III
VOUT = VDRM, RL = 3.3 kΩ, Tj = 125 °C
II - III
Value
Unit
Max.
10
mA
Max.
1.0
V
Min.
0.15
V
IH
IOUT = 100 mA
Max.
10
mA
IL
IG = 1.2 x IGT
Max.
25
mA
VOUT = 402 V, gate open, Tj = 125 °C
Min.
2000
V/μs
Without snubber (15 V/μs), Tj = 125 °C, turn-off time ≤20 ms
Min.
2
A/ms
ICL = 0.1 mA, tp = 1 ms
Min.
650
V
dV/dt
(dI/dt)c
VCL
1. Minimum IGT is guaranteed at 10% of IGT max.
Table 3. Static electrical characteristics
Symbol
(1)
Value
Unit
ITM = 1.1 A, tp = 500 μs
Tj = 25 °C
Max.
1.3
V
VT0
Threshold voltage
Tj = 125 °C
Max.
0.85
V
Rd(1)
Dynamic resistance
Tj = 125 °C
Max.
300
mΩ
2
µA
0.2
mA
VTM
(1)
IDRM
IRRM
DS1641 - Rev 6
Test conditions
VOUT = VDRM/ VRRM
Tj = 25 °C
Tj = 125 °C
Max.
page 2/13
ACS108-6SA
Characteristics
1. For both polarities of OUT pin referenced to COM pin
Table 4. Thermal characteristics
Symbol
DS1641 - Rev 6
Parameter
Max. value
Rth(j-l)
Junction to lead (AC)
60
Rth(j-a)
Junction to ambient
150
Unit
°C/W
page 3/13
ACS108-6SA
Characteristics (curves)
1.1
Characteristics (curves)
Figure 1. Maximum power dissipation versus rms on-state
current
0.9
P (W)
Figure 2. On-state rms current versus ambient
temperature
0.9
0.8
α =180 °
0.8
0.7
0.7
0.6
0.6
0.5
0.5
0.4
0.4
0.3
TO-92
0.3
0.2
0.2
180°
0.1
Single layer Printed
circuit board FR4
0.1
IT(RMS) ( A)
Ta °C
Natural convection
0.0
0.0
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
Figure 3. Relative variation of thermal impedance junction
to ambient versus pulse duration
1.00
IT(RMS) (A)
α = 180°
K=[Zth(j-a) /Rth(j-a) ]
0
25
50
75
100
125
Figure 4. Relative variation of holding and latching
current versus junction temperature
3.0
IH, I L [T j] / IH, IL [T j=25 ° C]
Zth(j -a)
2.5
IL
2.0
1.5
0.10
IH
TO-92
1.0
0.5
t P (s)
0.01
1.0E-03
DS1641 - Rev 6
Tj (°C)
0.0
1.0E-02
1.0E-01
1.0E+00
1.0E+01
1.0E+02
1.0E+03
-50
-25
0
25
50
75
100
125
page 4/13
ACS108-6SA
Characteristics (curves)
Figure 5. Relative variation of IGT and VGT versus junction
temperature
IGT, VGT [T j ] / IGT, VGT, [ Tj =25 °C]
3.5
3.0
IGT Q3
2.0
1.5
1.0
VGT Q2-Q3
0.5
Tj (°C)
0.0
-50
-25
0
25
50
75
100
ITSM(A)
t=20ms
One cycle
Non repetitive
Tj initial=25 °C
TO-92
Repetitive
Tlead = 76 °C
10
100
1000
Figure 8. On-state characteristics (maximum values)
100.00
ITM(A)
Sinusoidal pulse,
tp < 10 ms
Tj initial = 25 °C
ITSM
1.E+02
Number of cycles
1
125
Figure 7. Non repetitive surge peak on-state current for a
sinusoidal pulse
1.E+03
ITSM(A)
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
IGT Q2
2.5
Figure 6. Surge peak on-state current versus number of
cycles
10.00
1.E+01
1.00
Tj=125 °C
1.E+00
Tj max.:
Tj=25 °C
Vto = 0.85 V
VTM(V)
t p(ms)
1.E-01
0.01
0.10
1.00
0.0
10.00
Figure 9. Relative variation of critical rate of decrease of
main current versus junction temperature
2.5
Rd = 300 mΩ
0.10
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
Figure 10. Relative variation of static dV/dt immunity
versus junction temperature (typical values above 5kV/µs)
5
(dI/dt) c [T j ] / (dI/dt)c [Tj =125 °C]
0.5
dV/dt [ T j ] / dV/dt [ T j =125°C]
VD =VR=402V
4
2.0
1.5
3
1.0
2
0.5
1
Tj (°C)
Tj (°C)
0.0
25
35
45
55
65
75
85
95
105
115
125
0
25
DS1641 - Rev 6
50
75
100
125
page 5/13
ACS108-6SA
Characteristics (curves)
Figure 11. Relative variation of leakage current versus
junction temperature
1.0E+00
Figure 12. Relative variation of critical rate of decrease of
main current (di/dt)c versus (dV/dt)c
IDRM/IRRM [Tj;V DRM/ VRRM]/IDRM/IRRM [Tj=125°C;600V ]
5.0
(dI/dt) c [ (dV/dt) c ] / Specified(dI/dt ) c
Tj =125 °C
4.5
4.0
3.5
1.0E-01
3.0
VDRM=VRRM=600 V
2.5
2.0
1.0E-02
1.5
1.0
0.5
Tj (°C)
(dV/dt) c (V/µs)
0.0
1.0E-03
25
DS1641 - Rev 6
50
75
100
125
0.1
1.0
10.0
100.0
page 6/13
ACS108-6SA
Alternating current mains switch - basic application
2
Alternating current mains switch - basic application
The ACS108 switch is triggered by a negative gate current flowing from the gate pin G. The switch can be driven
directly by the digital controller through a resistor as shown in Figure 13. Typical application schematic
Thanks to its overvoltage protection and turn-off commutation performance, the ACS108 switch can drive a small
power high inductive load with neither varistor nor additional turn-off snubber.
Figure 13. Typical application schematic
Lamp
Solenoid
Motor
M
AC Mains
OUT
Vss
MCU
ACS108
Rg = 220 Ohm
GATE
Vdd
COM
2.1
Protection against overvoltage: the best choice is ACS
In comparison with standard Triacs the ACS108 is over-voltage self-protected, as specified by the parameter VCL.
This feature is useful in two operating conditions: in case of turn-off of very inductive load, and in case of surge
voltage that can occur on the electrical network.
2.1.1
High inductive load switch-off: turn-off overvoltage clamping
With high inductive and low rms current loads the rate of decrease of the current is very low. An overvoltage can
occur when the gate current is removed and the OUT current is lower than IH.
As shown in Figure 14. Switching off of a high inductive load - typical clamping capability of ACS108 (Tamb = 25
°C), at the end of the last conduction half-cycle, the load current decreases ① . The load current reaches the
holding current level IH ② , and the ACS turns off ③ . The water valve, as an inductive load (up to 15 H), reacts
as a current generator and an overvoltage is created, which is clamped by the ACS ④ . The current flows through
the ACS avalanche and decreases linearly to zero. During this time, the voltage across the switch is limited to the
DS1641 - Rev 6
page 7/13
ACS108-6SA
Protection against overvoltage: the best choice is ACS
clamping voltage VCL. The energy stored in the inductance of the load is dissipated in the clamping section that is
designed for this purpose. When the energy has been dissipated, the ACS voltage falls back to the mains voltage
value (230 V rms, 50 Hz) ⑤.
Figure 14. Switching off of a high inductive load - typical clamping capability of ACS108 (Tamb = 25 °C)
2.1.2
Alternating current mains transient voltage ruggedness
The ACS108 switch is able to withstand safely the AC mains transients either by clamping the low energy spikes
or by breaking-over when subjected to high energy shocks, even with high turn-on current rises.
The test circuit shown in Figure 15. Overvoltage ruggedness test circuit for resistive and inductive loads, Tamb =
25 °C (conditions equivalent to IEC 61000-4-5 standard) is representative of the final ACS108 application, and is
also used to test the AC switch according to the IEC 61000-4-5 standard conditions. Thanks to the load limiting
the current, the ACS108 switch withstands the voltage spikes up to 2 kV above the peak mains voltage. The
protection is based on an overvoltage crowbar technology. Actually, the ACS108 breaks over safely as shown in
Figure 16. Typical current and voltage waveforms across the ACS108 (+2 kV surge, IEC 61000-4-5 standard).
The ACS108 recovers its blocking voltage capability after the surge (switch off back at the next zero crossing of
the current).
Such non-repetitive tests can be done 10 times on each AC mains voltage polarity.
DS1641 - Rev 6
page 8/13
ACS108-6SA
Protection against overvoltage: the best choice is ACS
Figure 15. Overvoltage ruggedness test circuit for resistive and inductive loads, Tamb = 25 °C (conditions
equivalent to IEC 61000-4-5 standard)
+ 2kV Surge generator
Rgenerator
Filtering unit
Cc
Model of the load
L = 5 μH
AC mains 230 V RMS, 50 Hz
R = 150 Ω
OUT
ACS108
GATE
Rg = 220 Ω
COM
Figure 16. Typical current and voltage waveforms across the ACS108 (+2 kV surge, IEC 61000-4-5
standard)
DS1641 - Rev 6
page 9/13
ACS108-6SA
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 status are available at: www.st.com. ECOPACK® is an ST trademark.
3.1
TO-92 package information
•
•
Epoxy meets UL94, V0
Lead free plating + halogen-free molding resin
Figure 17. TO-92 package outline
c
A
a
B
C
b
D
F
E
Table 5. TO-92 package mechanical data
Dimensions
Ref.
Inches(1)
Millimeters
Min.
A
Typ.
Max.
Min.
1.35
B
Typ.
0.0531
4.70
C
Max.
0.1850
2.54
0.1000
D
4.40
0.1732
E
12.70
0.5000
F
3.70
0.1457
a
0.50
0.0197
b
1.27
c
0.500
0.48
0.0189
1. Inches dimensions given for information
DS1641 - Rev 6
page 10/13
ACS108-6SA
Ordering information
4
Ordering information
Figure 18. Ordering information scheme
ACS
1
08 - 6
S
A -TR
AC switch series
Number of switches
Current
08 = 0.8 A rms
Voltage
6 = 600 V
Gate current
S = 10 mA
Package
A = TO-92
Packing
TR = Tape and reel 13” (TO-92, 2000 pieces)
AP = Ammopack (TO-92, 2000 pieces)
Blank = bulk (TO-92, 2500 pieces)
Table 6. Ordering information
Order code
Marking
Package
Weight
ACS108-6SA
ACS108-6SA-TR
ACS108 6SA(1)
ACS108-6SA-AP
TO-92
0.2 g
Base qty.
Packing mode
2500
Bulk
2000
Tape and reel
2000
Ammopack
1. First row = ACS108, second row = 6SA
DS1641 - Rev 6
page 11/13
ACS108-6SA
Revision history
Table 7. Document revision history
DS1641 - Rev 6
Date
Version
Changes
Apr_2004
1
Initial release. This datasheet covers order codes previously described in the
datasheet for ACS108-6S, Doc ID 11962, Rev 3 December 2010.
21-Jun-2005
2
Marking information updated from ACSxxxx to ACS1xxx.
11-Jul-2012
3
Removed 500 V devices and added 600 V and 800 V devices.
27-Sep-2013
4
Corrected typographical error in Figure 4.
31-Oct-2013
5
Corrected character formatting issues in Section 2.1.1.
07-Feb-2019
6
Removed SOT-223 package and ACS108-8SA.
page 12/13
ACS108-6SA
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DS1641 - Rev 6
page 13/13