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ACS108-6S
AC switch family Transient voltage protected AC Switch (ACSTM)
Main product characteristics
IT(RMS) VDRM/VRRM IGT

0.8 A 600 V 10 mA
COM
Overvoltage protection by crowbar technology High noise immunity - static dV/dt > 500 V/s
G COM OUT
COM OUT G
SOT-223 ACS108-6SN Description
TO-92 ACS108-6SA
Applications

AC ON/OFF static switching in appliances and industrial control systems Drive of low power high inductive or resistive loads like: - relay, valve, solenoid, - dispenser, door lock - pump, fan, micro-motor
The ACS108-6S belongs to the AC line switch family. This high performance switch can control a load of up to 0.8A. The ACS108-6S switch includes an overvoltage crowbar structure to absorb the overvoltage 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.
Benefits

Needs no external protection snubber or varistor. Enables equipment to meet IEC 61000-4-5. Reduces component count by up to 80%. Interfaces directly with the micro-controller. Common package tab connection supports connection of several alternating current switches (ACS) on the same cooling pad. Integrated structure based on ASD(1) technology
Functional diagram
OUT
G
Order code
Part number ACS108-6SA ACS108-6SA-TR ACS108-6SA-AP ACS108-6SN-TR Marking ACS1086S ACS1086S ACS1086S ACS1086S
COM
COM OUT G Common drive reference to connect to the mains Output to connect to the load. Gate input to connect to the controller through gate resistor
1. ASD: Application Specific Devices
TM: ACS is a trademark of STMicroelectronics
January 2006
Rev 1 1/11
www.st.com 11
1 Characteristics
ACS108-6S
1
Table 1.
Symbol
Characteristics
Absolute maximum ratings (Tamb = 25 C, unless otherwise specified)
Parameter TO-92 Tlead = 75 C Tamb = 75 C Tamb = 61 C t = 16.7 ms t = 20 ms tp = 10 ms f = 120 Hz Tj = 125 C Tj = 25 C tp = 20 s Tj = 125 C Tj = 125 C Tj = 125 C 0.45 7.6 A f = 50 Hz 7.3 0.38 100 2 1 10 0.1 -40 to +150 -30 to +125 A2s A/s kV A V W C Value 0.8 A Unit
IT(RMS)
RMS on-state current (full sine wave)
SOT-223 TO-92
ITSM It dI/dt VPP IGM VGM PG(AV) Tstg Tj
Non repetitive surge peak on-state current (full cycle sine wave, Tj initial = 25 C) It Value for fusing Critical rate of rise of on-state current IG = 2xIGT, tr 100 ns Non repetitive line peak mains voltage(1) Peak gate current Peak positive gate voltage Average gate power dissipation Storage junction temperature range Operating junction temperature range
f = 60 Hz
1. according to test described by IEC 61000-4-5 standard and Figure 16
Table 2.
Symbol IGT (1) VGT VGD IH (2) IL(2) dV/dt (2) (dI/dt)c (2) VCL
Electrical characteristics (Tj = 25 C, unless otherwise specified)
Test conditions VOUT = 12 V, RL = 33 VOUT = VDRM, RL =3.3 k, Tj = 125 C IOUT = 100 mA IG = 1.2 x IGT VOUT = 67% VDRM, gate open, Tj = 125 C Without snubber (15 V/s), turn-off time 20 ms, Tj = 125 C ICL = 0.1 mA, tp = 1 ms, Tj = 125 C Quadrant II - III II - III II - III MAX MAX MIN MAX MAX MIN MIN MIN Value 10 1 0.15 25 30 500 0.3 650 Unit mA V V mA mA V/s A/ms V
1. minimum IGT is guaranteed at 10% of IGT max 2. for both polarities of OUT referenced to COM
2/11
ACS108-6S
Table 3.
Symbol VTM (1) VTO (1) RD (1) IDRM IRRM VOUT = 600 V ITM= 1.1 A, tp = 500 s
1 Characteristics
Static electrical characteristics
Test conditions Tj = 25 C Tj = 125 C Tj = 125 C Tj = 25 C MAX Tj = 125 C 0.2 mA MAX MAX MAX Value 1.3 0.90 300 2 Unit V V m A
1. for both polarities of OUT referenced to COM
Table 4.
Symbol Rth (j-l) Rth (j-l) Rth (j-a)
Thermal resistance
Parameter Junction to lead (AC) Junction to tab (AC) Junction to ambient S = 5 cm SOT-223 60 TO-92 SOT-223 TO-92 Value 60 25 150 C/W Unit
Figure 1.
P (W)
Maximum power dissipation vs RMS Figure 2. on-state current (full cycle)
1.0 0.9
RMS on-state current vs ambient temperature (full cycle)
0.90 0.80 0.70 0.60 0.50
IT(RMS) (A)
ACS108-6SN (with 5cm copper surface under tab)
0.8 0.7 0.6 0.5
ACS108-6SA
0.40 0.30 0.20 0.10 0.00 0.00
180
0.4 0.3 0.2 0.1 0.0
0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80
IT(RMS) (A)
Tamb C
0 25 50 75 100 125
3/11
1 Characteristics
ACS108-6S
Figure 4. Relative variation of gate trigger current, holding current and latching current vs junction temperature
Figure 3.
Relative variation of junction to ambient thermal impedance vs pulse duration and package
K=[Zth(j-a) /Rth(j-a) ]
1.E+00
1.E-01
TO-92
SOT-223
tP (S)
1.E-02 1.E-03 1.E-02 1.E-01 1.E+00 1.E+01 1.E+02 1.E+03
2.8 2.6 2.4 2.2 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0
IGT, IH, IL [T j] / IGT, IH, IL [T j=25C]
IGT
IL & IH
Tj(C) -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130
Figure 5.
Non repetitive surge peak on-state current vs number of cycles .
Figure 6.
Non repetitive surge peak on-state current for a sinusoidal pulse with width tp < 10 ms, and corresponding value of It (Tj initial = 25 C).
ITSM (A)
10 9 8 7 6 5 4 3 2 1 0 1 10 100 Number of cycles 1000
1.E-01
Repetitive Tamb = 75 C Non repetitive Tj initial = 25 C
t=20ms
ITSM(A), It (As)
1.E+03
Tj initial=25C
One cycle
1.E+02
ITSM
1.E+01
1.E+00
It
tp(ms) 0.01 0.10 1.00 10.00
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ACS108-6S
Figure 7. On-state characteristics (maximal values) Figure 8.
1 Characteristics
SOT-223 junction to ambient thermal resistance versus copper surface under tab (PCB FR4, copper thickness 35 m)
ITM(A)
10.00
Tj max.: Vto= 0.9 V Rd= 300 m
140 120 100
Rth(j-a) (C/W)
SOT-223
1.00
Tj=125C
80
Tj=25C
60
0.10
40 20 0
VTM(V) 0.01 0.0
SCU(cm)
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
Figure 9.
Relative variation of critical rate of decrease of main current (di/dt)c versus junction temperature
Figure 10. Relative variation of critical rate of decrease of main current (di/dt)c vs (dV/dt)c, with turn-off time < 20 ms
2.0 1.8
(dI/dt)c [Tj] / (dI/dt)c [Tj=125 C]
20 18 16 14 12 10 8 6 4 2 0 55 65 75 85 95 105 115 125
Vout = 400 V
(dI/dt)c [ (dV/dt) c ] / Specified (dI/dt) c
Vout = 400 V
1.6 1.4 1.2 1.0 0.8 0.6 0.4
Tj (C)
0.2 0.0 0.1 1
(dV/dt)c (V/s)
10
100
Figure 11. Relative variation of static dV/dt versus junction temperature
dV/dt [T j] / dV/dt [T j=125C]
Figure 12. Relative variation of the maximal clamping voltage versus junction temperature (min value)
VCL [T j] / VDRM
1.20
8 7 6 5
Vout=400V
1.10 1.00 0.90
4 0.80 3 2 1 0 25 50 75 100 125 Tj(C) 0.50 -25 0 25 50 75 100 125 0.70 0.60 Tj(C)
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2 AC line switch - basic application
ACS108-6S
2
AC line switch - basic application
The ACS108-6S 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. Thanks to its overvoltage protection and turn-off commutation performance, the ACS108-6S switch can drive a small power high inductive load with neither varistor nor additional turn-off snubber. Figure 13. Typical application program
Valve AC Mains Vss MCU Vdd Rg ACS108-6S
Power supply
2.1
Protection against overvoltage: the best choice is ACS
In comparison with standard triacs, which are not robust against surge voltage, the ACS108-6S is over-voltage self-protected, specified by the new 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 and Figure 15, 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 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 (5).
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ACS108-6S
2 AC line switch - basic application
Figure 14. Effect of the switching off of a high inductive load - typical clamping capability of ACS108-6S
4 VPEAK = V CL I OUT (5 mA/div) 3 1 IH VOUT (200 V/div)
Figure 15. Description of the different steps during switching off of a high inductive load
I OUT
1
IH
2 5
3 4
VOUT VCL
2
5
100s/div
2.1.2
AC line transient voltage ruggedness
The ACS108-6S switch is able to withstand safely the AC line transients either by clamping the low energy spikes or by breaking over under high energy shocks, even with high turn-on current rises. The test circuit shown in Figure 16 is representative of the final ACS108-6S application, and is also used to test the ACS switch according to the IEC 61000-4-5 standard conditions. Thanks to the load limiting the current, the ACS108-6S switch withstands the voltage spikes up to 2 kV above the peak line voltage. The protection is based on an overvoltage crowbar technology. Actually, the ACS108-6S breaks over safely as shown in Figure 17. The ACS108-6S 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 line voltage polarity.
Figure 16. Overvoltage ruggedness test circuit Figure 17. Typical current and voltage waveforms across the ACS108-6S for resistive and inductive loads during IEC 61000-4-5 standard test with conditions equivalent to IEC 61000-4-5 standards
VPEAK I OUT (2 A/div)
Model of the load L R 150 5H ACS108-6Sx
Surge generator "1.2/50 waveform" Rgene 2 2.4 kV surge Rg 220
VOUT (200 V/div)
200ns/div
7/11
3 Ordering information scheme
ACS108-6S
3
Ordering information scheme
ACS
AC Switch series Number of switches Current 08 = 0.8 ARMS Voltage 6 = 600 V Sensitivity S = 10 mA Package A = TO-92 N = SOT-223 Packing TR = Tape and reel AP = Ammopack (TO-92) Blank = (TO-92) Bulk (SOT-223) Tube
1
08 - 6
S
A -TR
4
4.1
Package information
TO-92 Mechanical data
DIMENSIONS REF
A a B C
Millimeters Min. Typ. 1.35 4.70 2.54 4.40 12.70 3.70 0.50 0.173 0.500 Max. Min.
Inches Typ. 0.053 0.185 0.100 Max.
A B C D
F
D
E
E F a
0.146 0.019
8/11
ACS108-6S
4 Package information
4.2
SOT-223 Mechanical data
DIMENSIONS REF.
A A1 e1 B V c
Millimeters Min. Typ. Max. 1.80 0.02 0.60 2.90 0.24 6.30 0.70 3.00 0.26 6.50 2.3 4.6 3.30 6.70 3.50 7.00 3.70 7.30 0.130 0.264 0.80 3.10 0.32 6.70 0.024 0.114 0.009 0.248 Min.
Inches Typ. Max. 0.071 0.001 0.027 0.118 0.010 0.256 0.090 0.181 0.138 0.276 0.146 0.287 0.031 0.122 0.013 0.264
A A1 B B1 c D
4 H E 1 2 3
D B1
e e1 E
e
H V
10 max
Figure 18. SOT-223 Footprint
3.25
1.32
5.16
7.80
1.32
2.30
0.95
In order to meet environmental requirements, ST offers these devices in ECOPACK(R) 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.
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5 Ordering information
ACS108-6S
5
Ordering information
Part number ACS108-6SA ACS108-6SA-TR ACS108-6SA-AP ACS108-6SN-TR Marking ACS1086S ACS1086S ACS1086S ACS1086S Package TO-92 TO-92 TO-92 SOT-223 Weight Base Qty Packing mode Bulk Tape and Reel Ammopack Tape & reel
6
Revision history
Date 05-Jan-2005 Revision 1 Initial release. Changes
10/11
ACS108-6S
6 Revision history
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 (c) 2006 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com
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