STMicroelectronics ACS108-6SUF-TR Overvoltage protected ac switch (acsâ ¢) Datasheet

ACS108-6S
Overvoltage protected AC switch (ACS™)
Datasheet − production data
Features
■
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 A.S.D.®
technology
■
Overvoltage protection by crowbar technology
■
High noise immunity - static dV/dt > 500 V/µs
Applications
COM
OUT
G
SMBflat-3L
ACS108-6SUF
Figure 1.
■
Alternating current 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, low power motor
Functional diagram
OUT
G
Description
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
COM
OUT
G
The ACS108-6S belongs to the AC line switch
family. This high performance switch can control a
load of up to 0.8 A.
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.
Table 1.
Device summary
Symbol
Value
Unit
IT(RMS)
0.8
A
VDRM/VRRM
600
V
IGT
10
mA
®: A.S.D. is a registered trademark of STMicroelectonics
TM: ACS is a trademark of STMicroelectronics
June 2012
This is information on a product in full production.
Doc ID 11962 Rev 4
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12
Characteristics
1
ACS108-6S
Characteristics
Table 2.
Absolute maximum ratings (Tamb = 25 °C, unless otherwise specified)
Symbol
IT(RMS)
Parameter
On-state rms current (full sine wave)
Value
Unit
Tamb = 62 °C
0.45
A
Ttab = 113 °C
0.8
A
F = 60 Hz
Non repetitive surge peak on-state
current
(full cycle sine wave, Tj initial = 25 °C) F = 50 Hz
t = 16.7 ms
7.6
t = 20 ms
7.3
I²t Value for fusing
tp = 10 ms
0.38
A2 s
dI/dt
Critical rate of rise of on-state current
F = 120 Hz
IG = 2xIGT, tr ≤ 100 ns
Tj = 125 °C
100
A/µs
VPP
Non repetitive line peak mains voltage(1)
Tj = 25 °C
2
kV
IGM
Peak gate current
Tj = 125 °C
1
A
VGM
Peak positive gate voltage
Tj = 125 °C
10
V
Average gate power dissipation
Tj = 125 °C
0.1
W
-40 to +150
-30 to +125
°C
ITSM
I2t
PG(AV)
Tstg
Tj
tp = 20 µs
A
Storage junction temperature range
Operating junction temperature range
1. according to test described by IEC 61000-4-5 standard and Figure 19
Table 3.
Electrical characteristics (Tj = 25 °C, unless otherwise specified)
Symbol
IGT(1)
VGT
Test conditions
VOUT = 12 V, RL = 33 Ω
Quadrant
Unit
II - III
Max.
10
mA
II - III
Max.
1
V
II - III
Min.
0.15
V
VGD
VOUT = VDRM, RL =3.3 kΩ, Tj = 125 °C
IH (2)
IOUT = 100 mA
Max.
25
mA
IL(2)
IG = 1.2 x IGT
Max.
30
mA
Min.
500
V/µs
Without snubber (15 V/µs), turn-off time ≤ 20 ms, Tj = 125 °C
Min.
0.3
ICL = 0.1 mA, tp = 1 ms, Tj = 125 °C
Min.
650
dV/dt(2) VOUT = 67% VDRM, gate open, Tj = 125 °C
(dI/dt)c(2
)
VCL
1. Minimum IGT is guaranteed at 10% of IGT max
2. For both polarities of OUT referenced to COM
2/12
Value
Doc ID 11962 Rev 4
A/ms
V
ACS108-6S
Characteristics
Table 4.
Static electrical characteristics
Symbol
VTM (1)
VTO
(1)
RD
(1)
IDRM
IRRM
Test conditions
Value
Unit
ITM = 1.1 A, tp = 500 µs
Tj = 25 °C
Max.
1.3
V
Threshold voltage
Tj = 125 °C
Max.
0.90
V
Tj = 125 °C
Max.
300
mΩ
2
µA
0.2
mA
Tj = 25 °C
VOUT = 600 V
Max.
Tj = 125 °C
1. For both polarities of OUT referenced to COM
Table 5.
Thermal resistance
Symbol
Parameter
Rth (j-t)
Junction to tab (AC)
Rth (j-a)
Junction to ambient
S = 5 cm²
Doc ID 11962 Rev 4
Value
Unit
Max.
14
°C/W
Max.
75
3/12
Characteristics
Figure 2.
0.9
ACS108-6S
Maximum power dissipation
versus on-state rms current
(full cycle)
Figure 3.
P(W)
1.00
180°
0.8
On-state rms current versus tab
temperature (full cycle)
IT(RMS)(A)
0.90
0.80
0.7
0.70
0.6
0.60
0.5
0.50
0.4
0.40
0.3
0.30
0.2
0.20
0.1
0.10
IT(RMS)(A)
0.0
0.0
0.1
Figure 4.
1.0
TC(°C)
0.00
0.2
0.3
0.4
0.5
0.6
0.7
0.8
On-state rms current versus
ambient temperature
(free air convection)
0
25
Figure 5.
IT(RMS)(A)
1.E+00
50
75
100
125
Relative variation of thermal
impedance junction to ambient
versus pulse duration
K = [Zth(j-a)/Rth(j-a)]
0.9
0.8
0.7
0.6
1.E-01
0.5
0.4
0.3
0.2
0.1
0.0
Ta(°C)
0
25
Figure 6.
2.0
50
75
100
125
Relative variation of, holding and
latching current versus junction
temperature
1.8
1.6
1.4
1.2
1.0
0.8
0.4
IH
IL
0.2
0.0
-40 -30 -20 -10 0
4/12
Figure 7.
tp(s)
1.E-02
1.E-01
1.E+00
1.E+01
1.E+02
1.E+03
Releative variation of IGT and VGT
versus junction temperature
IGT, VGT[Tj] / IGT, VGT[Tj = 25 °C]
IH, IL[Tj] / IH, IL[Tj = 25 °C]
0.6
1.E-02
1.E-03
Tj(°C)
2.8
2.6
2.4
2.2
IGT
2.0
1.8
1.6
1.4
1.2
VGT
1.0
0.8
0.6
0.4
0.2
0.0
-40 -30 -20 -10 0
10 20 30 40 50 60 70 80 90 100 110 120 130
Doc ID 11962 Rev 4
Tj(°C)
10 20 30 40 50 60 70 80 90 100 110 120 130
ACS108-6S
Figure 8.
10
Characteristics
Non repetitive surge peak on-state Figure 9.
current versus number of cycles
ITSM(A)
Non repetitive surge peak on-state
current for a sinusoidal pulse, and
corresponding value of I²t
2
100.0
9
ITSM(A), I t (A2s)
Tj initial = 25 °C
8
t = 20 ms
Non repetitive
Tj initial = 25 °C
7
ITSM
One cycle
10.0
6
5
pulse with width tp<10 ms, and corresponding value of I²t
4
Repetitive
Tc = 75 °C
3
1.0
I²t
2
1
Number of cycles
0
1
10
100
1000
Figure 10. On-state characteristics (maximal
values)
10.00
ITM(A)
0.10
1.00
10.00
Figure 11. Relative variation of critical rate of
decrease of main current versus
junction temperature
8
(dl / dt)c [Tj] / (dl / dt)c [Tj = 125 °C]
7
Tjmax:
Vto = 0.9 V
Rd = 300 mΩ
1.00
tp(ms)
0.1
0.01
6
5
Tj = 125 °C
4
Tj = 25 °C
3
0.10
2
1
0.01
0.0
VTM(V)
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
Figure 12. Relative variation of static dV/dt
immunity versus junction
temperature
8
Tj(°C)
0
25
50
75
100
125
Figure 13. Relative variation of the maximal
clamping voltage versus junction
temperature (min. value)
dV / dt [Tj] / dV / dt [Tj = 125 °C]
1.15
7
VCL[Tj/VCL[Tj = 25°C]
1.10
6
1.05
5
1.00
4
3
0.95
2
0.90
1
Tj(°C)
0
25
50
75
100
125
0.85
-30
Doc ID 11962 Rev 4
Tj(°C)
-10
10
30
50
70
90
110
130
5/12
Characteristics
ACS108-6S
Figure 14. Relative variation of critical rate
Figure 15. Thermal resistance junction to
ofdecrease of main current (di/dt)c
ambient versus copper surface
versus (dV/dt)c
under tab
(dI/dt)c [ (dV/dt) c ] / Specified (dI/dt) c
2.0
170
160
150
140
130
120
110
100
90
80
70
60
50
VOUT = 400 V
turn-off time < 20 ms
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
(dV/dt)c (V/µs)
0.2
0.0
0.1
6/12
1
10
100
Rth(j-a)(°C/W)
Epoxy printed circuit board FR4,
copper thickness 35 µm
S(cm²)
0
Doc ID 11962 Rev 4
1
2
3
4
5
ACS108-6S
2
Alternating current line switch - basic application
Alternating current 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 16.
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 16. Typical application program
Valve
AC Mains
Power supply
2.1
Vss
MCU
Vdd
Rg
ACS108-6S
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 17 and Figure 18, 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).
Doc ID 11962 Rev 4
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Alternating current line switch - basic application
ACS108-6S
Figure 17. Effect of the switching off of a high Figure 18. Description of the different steps
inductive load - typical clamping
during switching off of a high
capability of ACS108-6S
inductive load
4
I OUT
VPEAK = V CL
1
I OUT
(5 mA/div)
3
1
VOUT
(200 V/div)
2
IH
3
4
VOUT
5
VCL
IH
2
5
100µs/div
2.1.2
Alternating current 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 19 is representative of the final ACS108-6S 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 ACS108-6S 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 20. 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 19. Overvoltage ruggedness test Figure 20. Typical current and voltage
circuit for resistive and
waveforms across the
inductive
ACS108-6S
during IEC 61000-4-5 standard test
loads with conditions equivalent to
IEC 61000-4-5 standards
VPEAK
I OUT
(2 A/div)
Surge generator
"1.2/50 waveform"
Rgene
2
VOUT
(200 V/div)
Model of the load
L
R
150
5µH
ACS108-6Sx
2.4 kV surge
Rg
220
200ns/div
8/12
Doc ID 11962 Rev 4
ACS108-6S
3
Ordering information scheme
Ordering information scheme
Figure 21. Ordering information scheme
ACS
1
08 - 6
S UF -TR
AC switch series
Number of switches
Current
08 = 0.8 A rms
Voltage
6 = 600 V
Sensitivity
S = 10 mA
Package
UF = SMBflat-3L
Packing
TR = 13”, 5000 pieces
Doc ID 11962 Rev 4
9/12
Package information
4
ACS108-6S
Package information
●
Epoxy meets UL94, V0
●
Lead-free packages
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.
Table 6.
SMBflat-3L dimensions
Dimensions
Ref.
Millimeters
Inches
Min. Typ. Max.
Min.
Typ.
Max.
A
0.90
1.10
0.035
0.043
b
0.35
0.65
0.014
0.026
b4
1.95
2.20
0.07
0.087
c
0.15
0.40
0.006
0.016
D
3.30
3.95
0.130
0.156
E
5.10
5.60
0.201
0.220
E1
4.05
4.60
0.156
0.181
L
0.75
1.50
0.030
0.059
A
c
e
D
b 2x
L2 2x
L 2x
L1
E E1
L1
L
L2
b4
L1
0.40
0.016
L2
0.60
0.024
e
1.60
0.063
Figure 22. SMBflat-3L footprint dimensions
5.84
(0.230)
0.51
(0.020)
2.07
(0.082)
2.07
(0.082)
0.51
(0.020)
1.20
(0.047)
3.44
(0.136)
millimeters
(inches)
10/12
Doc ID 11962 Rev 4
1.20
(0.047)
ACS108-6S
5
Ordering information
Ordering information
Table 7.
6
Ordering information
Order code
Marking
Package
Weight
Base Qty
Delivery mode
ACS108-6SUF-TR
ACS1086S
SMBflat-3L
46.91 mg
5000
Tape and reel
Revision history
04
Table 8.
Document revision history
Date
Revision
Changes
05-Jan-2005
1
Initial release.
07-Jun-2006
2
Reformatted to current standard. Replaced Figure 9.
14-Dec-2010
3
Added Epoxy meets UL94, V0 in Package information. Updated
ECOPACK statement. Added SMBflat-3L package. Updated
graphics.
12-Jun-2012
4
Information regarding TO-92 and SOT-223 packages transferred to
STMicroelectronics datasheet ACS108.
Doc ID 11962 Rev 4
11/12
ACS108-6S
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