ACS108/5S [STMICROELECTRONICS]
AC LINE SWITCH; AC线路开关
ST 
ACS108-5Sx
®
ASD™
AC Switch Family
AC LINE SWITCH
MAIN APPLICATIONS
■
AC on-off static switching in appliance & indus-
trial control systems
■
Drive of low power high inductive or resistive
loads like
- relay, valve, solenoid, dispenser
- pump, fan, micro-motor
- defrost heater
OUT
COM
G
TO-92
FEATURES
ACS108-5SA
■
■
■
■
Blocking voltage: VDRM / VRRM = 500V
Clamping voltage: VCL = 600V
Nominal current: IT(RMS) = 0.8 A
Gate triggering current : IGT < 10mA
■
■
■
Triggering current is sourced by the gate
Switch integrated driver
Drive reference COM connected to the SOT-223
tab
COM
OUT
COM
G
SOT-223
ACS108-5SN
BENEFITS
■
■
Needs no external overvoltage protection.
Enables the equipment to meet IEC61000-4-5
standard.
■
■
Allows straightforward connection of several
SOT-223 devices on the same cooling pad.
Reduces the switch component count by up to
80%.
FUNCTIONAL DIAGRAM
OUT
■
■
Interfaces directly with the microcontroller.
Eliminates any stressing gate kick back on the
microcontroller.
ACS108
DESCRIPTION
S
The ACS108 belongs to the AC line switches built
around the ASD™ concept. This high performance
device is able to control an 0.8 A load device.
The ACS™switch embeds a high voltage clamping
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.
For further technical information, please refer to
ON
D
COM
G
ASD and ACS are a trademarks of STMicroelectronics.
June 2005
REV. 2
1/8
ACS108-5Sx
ABSOLUTE RATINGS (limiting values)
Symbol
Parameter
Repetitive peak off-state voltage
Value
500
Unit
V
VDRM
/
Tj = 125 °C
VRRM
IT(RMS)
RMS on-state current full cycle sine
wave 50 to 60 Hz
TO-92
TO-92
Tlead = 75 °C
Tamb = 60 °C
0.8
0.3
0.8
7.3
8
A
A
A
A
A
SOT-223 Tamb = 75 °C
F = 50 Hz
ITMS
dI/dt
Non repetitive surge peak on-state current
Tj initial = 25°C, full cycle sine wave
F = 60 Hz
F = 120 Hz
Critical rate of repetitive rise of on-state current
IG = 20mA with tr = 100ns
100
A/µs
VPP
Tstg
Tj
Non repetitive line peak pulse voltage
Storage temperature range
Operating junction temperature range
Maximum lead temperature for soldering during 10s
note 1
2
kV
- 40 to + 150 °C
- 30 to + 125 °C
Tl
260
°C
Note 1: according to test described by IEC61000-4-5 standard & Figure 3.
SWITCH GATE CHARACTERISTICS (maximum values)
Symbol
PG(AV)
IGM
Parameter
Average gate power dissipation
Peak gate current (tp = 20µs)
Value
0.1
1
Unit
W
A
VGM
Peak positive gate voltage (respect to the pin COM)
5
V
THERMAL RESISTANCES
Symbol
Rth (j-a) Junction to ambient
Parameter
Value
150
60
60
25
Unit
°C/W
°C/W
°C/W
°C/W
TO-92
SOT-223 (*)
TO-92
Rth (j-l) Junction to lead for full AC line cycle conduction
Rth (j-t) Junction to tab for full AC line cycle conduction
SOT-223
2
(*) : with 5 cm copper (e=35µm) surface under tab
ELECTRICAL CHARACTERISTICS
For either positive or negative polarity of pin OUT voltage respect to pin COM voltage excepted note 3
Symbol
IGT
VGT
VGD
IH
Test conditions
RL = 140Ω
RL = 140Ω
RL = 3.3kΩ
gate open
Values
10
1
0.15
25
60
30
65
1.3
2
200
500
0.1
0.3
600
Unit
mA
V
VOUT = 12V
VOUT = 12V
VOUT = VDRM
IOUT = 100mA
Tj = 25°C MAX.
Tj = 25°C MAX.
Tj = 125°C MIN.
Tj = 25°C TYP.
MAX.
V
mA
mA
mA
mA
V
µA
µA
V/µs
A/ms
A/ms
V
IL
IG = 20mA
Tj = 25°C TYP.
MAX.
VTM
IOUT = 1.1A
VOUT = VDRM
VOUT = VRRM
tp = 500µs
Tj = 25°C MAX.
Tj = 25°C MAX.
Tj = 125°C MAX.
Tj = 110°C MIN.
Tj = 110°C MIN.
Tj = 110°C MIN.
Tj = 25°C TYP.
IDRM
/
IRRM
dV/dt
V
OUT = 400V
gate open
(dI/dt)c (dV/dt)c = 10V/µs
(dI/dt)c* (dV/dt)c = 15V/µsIOUT < 0 (note 3)
VCL ICL = 1mA tp = 1ms
2/8
®
ACS108-5Sx
AC LINE SWITCH BASIC APPLICATION
The ACS108 device is well adapted to washing machines, dishwashers, tumble driers, refrigerators, water
heaters and cookware. It has been especially designed to switch ON and OFF low power loads such as
solenoids, valves, relays, dispensers, micro-motors, fans, pumps, door locks and low power lamp bulbs.
Pin COM
Pin G
Pin OUT
: Common drive reference to connect to the power line neutral
: Switch Gate input to connect to the digital controller through the resistor
: Switch Output to connect to the load
This ACS™ switch is triggered with a negative gate current flowing out of the gate pin G. It can be driven
directly by the digital controller through a resistor as shown on the typical application diagram. No protec-
tion devices are required between the gates and common terminals.
The SOT-223 version allows several ACS108 devices to be connected on the same cooling PCB pad
which is the COM pin : this cooling pad can be then reduced, and the printed circuit layout is simplified.
In appliance systems, the ACS108 switch intends to drive low power load in full cycle ON/OFF mode. The
turn off commutation characteristics of these loads can be classified in 3 groups as shown in Table 1.
Thanks to its thermal and turn-off commutation characteristics, the ACS108 switch drives a load, such as
door lock, lamp, relay, valve and micro motor, up to 0.2 A without any turn-off aid circuit. Switching off the
ACS within one full AC line cycle will extend its current up to 0.8 A on resistive load.
Table 1: Load grouping versus their turn off commutation requirement (230V AC applications).
Load IRMS
current
(A)
(dI/dt)c
(dV/dt)c
TURN-OFF
DELAY
(ms)
POWER
FACTOR
LOAD
(A/ms)
0.15
(V/µs)
0.15
0.15
< 5
< 0.3
< 0.8
< 0.1
1
1
< 10
< 20
< 10
Door lock, lamp
0.4
Relay Valve
Dispenser
> 0.7
< 0.05
Micro-motor
< 0.2
< 0.6
> 0.2
> 0.2
< 0.1
< 0.3
< 10
< 10
< 10
< 20
Pump Fan
TYPICAL APPLICATION DIAGRAM
LOAD
L
AC
MAINS
L
N
R
OUT
S
ACS108
ON
D
COM
G
ST 72 MCU
- Vcc
3/8
®
ACS108-5Sx
HIGH INDUCTIVE SWITCH-OFF OPERATION
At the end of the last conduction half-cycle, the load current reaches the holding current level IH, and the
ACS™ switch turns off. Because of the inductance L of the load, the current flows through the avalanche
diode D 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 depends on the holding current IH and the inductance (up
to 10 H); it can reach about 20 mJ and is dissipated in the clamping section that is especially designed for
that purpose.
Fig. 1: Turn-off operation of the ACS108 switch
Fig. 2: ACS108 switch static characteristic.
with an electro valve: waveform of the gate current
IG, pin OUT current IOUT & voltage VOUT
.
I
OUT
IOUT
(10 mA/div)
VCL = 650V
IH
I
H
V
OUT
V
CL
VOUT
(200V/div)
Time (400µs/div)
AC LINE TRANSIENT VOLTAGE RUGGEDNESS
The ACS108 switch is able to safely withstand the AC line transient voltages either by clamping the low
energy spikes or by breaking over under high energy shocks.
The test circuit in Figure 4 is representative of the final ACS™ application and is also used to stress the
ACS™ switch according to the IEC61000-4-5 standard conditions. Thanks to the load, the ACS™ switch
withstands the voltage spikes up to 2 kV above the peak line voltage. It will break over safely even on resis-
tive load where the turn-on current rise is high as shown in Figure 4. Such non-repetitive testing can be
done 10 times on each AC line voltage polarity.
Fig. 3: Overvoltage ruggedness test circuit for resis-
tive and inductive loads according to IEC61000-4-5
standard.
Fig. 4: Current and voltage of the ACS™ during
IEC61000-4-5 standard test with a 150Ω - 10µH
load & VPP = 2kV.
R = 150Ω, L = 5µH, VPP = 2kV.
Vout (200 V/div)
R
L
Iout (2 A/div)
OUT
AC LINE &
SURGE VOLTAGE
GENERATOR
ACSxx
S
dI/dt = 100 A/µs
V
AC + VPP
ON
D
COM
G
RG= 220Ω
4/8
®
ACS108-5Sx
Fig. 5: Maximum power dissipation versus RMS
Fig. 6: RMS on-state current versus ambient
on-state current.
temperature.
P(W)
IT(RMS)(A)
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
ACS108-5SA (TO92, Tamb=Tlead)
ACS108-5SN with 5cm² copper surface under tab
ACS108-5SA (TO92)
0.1
0.0
Tamb(°C)
0.1
0.0
IT(RMS)(A)
0.3 0.4 0.5
0
10 20 30 40 50 60 70 80 90 100 110 120 130
0.0
0.1
0.2
0.6
0.7
0.8
Fig. 7-1: Relative variation of thermal impedance
junction to ambient versus pulse duration
(ACS108-5SA) (TO-92).
Fig. 7-2: Relative variation of thermal impedance
junction to ambient versus pulse duration
(ACS108-5SN) (SOT-223).
Zth(j-a) / Rth(j-a)
Zth(j-a) / Rth(j-a)
1.00
1.00
0.10
0.10
tp(s)
tp(s)
0.01
0.01
1E-3
1E-2
1E-1
1E+0
1E+1
1E+2 5E+2
1E-3
1E-2
1E-1
1E+0
1E+1
1E+2 5E+2
Fig. 8: Relative variation of gate trigger current
Fig. 9: Relative variation of holding and latch-
versus junction temperature.
ing current versus junction temperature.
IH,IL [Tj] / IH,IL [Tj=25°C]
IGT [Tj] / IGT [Tj=25°C]
2.0
3.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
2.5
2.0
1.5
1.0
0.5
0.2
Tj(°C)
40 60
Tj(°C)
0.0
0.0
-40
-20
0
20
80
100
120
140
-40
-20
0
20
40
60
80
100 120 140
5/8
®
ACS108-5Sx
Fig. 10: Non repetitive surge peak on-state current
versus number of cycles.
Fig. 11: Non-repetitive surge peak on-state cur-
rent for a sinusoidal pulse with width tp < 10ms,
and corresponding value of I2t.
ITSM(A)
ITSM(A),I²t(A²s)
9
100.0
Tj initial=25°C
ITSM
8
t=20ms
7
One cycle
6
10.0
1.0
Tj initial=25°C
Non repetitive
5
4
Tamb=25°C
Repetitive
3
2
I²t
tp(ms)
1
Number of cycles
0.1
0
0.01
0.10
1.00
10.00
1
10
100
1000
Fig. 12: On-state characteristics (maximum values).
Fig. 13: Thermal resistance junction to ambient
versus copper surface under tab (Epoxy printed
circuit board FR4, copper thickness: 35µm).
ITM(A)
Rth(j-a) (°C/W)
5.00
130
120
110
100
90
1.00
0.10
80
70
60
50
40
Tj max.:
Vto = 0.9 V
Rd = 300 mΩ
30
20
S(Cu) (cm²)
VTM(V)
10
0
0.01
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6
Fig. 14: Relative variation of critical (dl/dt)c versus
junction temperature.
(dI/dt)c [Tj] / (dI/dt)c [Tj=110°C]
3.0
2.5
2.0
1.5
1.0
0.5
Tj(°C)
0.0
0
10 20 30 40 50 60 70 80 90 100 110 120
6/8
®
ACS108-5Sx
ORDERING INFORMATION
ACS 1
08 -
5
S
A
-TR
Switch
Number
A = TO-92
N = SOT-223
VDRM
5 = 500V
AC Switch
-TR = SOT-223
Tape & Reel
Gate
Sensitivity
S = 10mA
ITRMS
08 = 0.8A
PACKAGE MECHANICAL DATA
SOT-223
DIMENSIONS
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
REF.
A
c
V
A1
B
A
A1
B
1.80
0.071
0.004
0.02
0.10 0.001
e1
D
0.60 0.70 0.85 0.024 0.027 0.033
2.90 3.00 3.15 0.114 0.118 0.124
0.24 0.26 0.35 0.009 0.010 0.014
6.30 6.50 6.70 0.248 0.256 0.264
PIN
1
DESCRIPTION
GATE BASE
B1
B1
c
2
DRAIN
COLLECTOR
EMITTER
SOURCE
DRAIN
3
4
D
COLLECTOR
4
2
e
2.3
4.6
0.090
0.181
H
E
e1
E
1
3
3.30 3.50 3.70 0.130 0.138 0.146
6.70 7.00 7.30 0.264 0.276 0.287
10° max
H
e
V
PACKAGE MECHANICAL DATA
SOT-223
Recommended soldering pattern SOT-223
7/8
®
ACS108-5Sx
PACKAGE MECHANICAL DATA
TO-92 (Plastic)
DIMENSIONS
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
A
REF.
a
A
B
C
D
E
F
a
1.35
0.053
B
C
4.70
0.185
2.54
0.100
4.40
12.70
0.173
0.500
F
D
E
3.70
0.45
0.146
0.017
OTHER INFORMATION
Ordering type
ACS108-5SA
ACS108-5SA-TR
ACS108-5SN
Marking
Package
TO-92
TO-92
Weight
0.2 g
0.2 g
Base qty Delivery mode
ACS108/5S
ACS108/5S
ACS1/085S
2500
2000
1000
Bulk
Tape & reel
Tape & reel
SOT-223
0.12 g
REVISION HISTORY
Date
Revision
Description of Changes
Apr-2004
21-Jun-2005
1
2
First Issue
Marking information updated from ACSxxxx to ACS1xxx
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
© 2005 STMicroelectronics - All rights reserved
STMicroelectronics GROUP OF COMPANIES
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8/8
®
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