SGS Thomson Microelectronics ACS108-5SN, ACS108-5SA Datasheet
ASD
AC Switch Family
MAIN APPLICATIONS
n AC Line switch for appliance control systems
n Drive of low power high inductive or resistive
loads like:
- solenoid, relay, valve, dispenser
- micro-motor
- door lock
- low powerlamp bulb
- pump
- fan
ACS108-5Sx
AC LINE SWITCH
OUT
COM
G
FEATURES
n V
n Avalanche controlled device
n I
n Gate triggering current : I
n Switch integrated driver
n DrivereferenceCOMconnectedtotheSOT223tab
DRM
T(RMS)
/V
RRM
= 0.8 A
= 500V
<10mA
GT
BENEFITS
n Needs no more external protection snubber &
varistor.
n Enables the equipment to meet IEC1000-4-5
standard.
n Allows straightforward connection of several
SOT223 devices onthe same cooling pad.
n Reduces the switch component count by up to
80%.
n Interfaces directlywith themicrocontroller.
n Eliminates any stressing gate kick back on the
microcontroller.
DESCRIPTION
The ACS108 belongs to the AC line switches built
aroundthe ASD concept. This high performance
full planar technology device is able to control an
0.8 A load.
The ACS switch embeds a high voltage
clamping structure to absorb the inductive
turn-off energy and a gat e level shift er driver t o
separate the digital controller f rom the main
switch. It is triggered with a negative gate current
flowing out of the gate pin.
TO92
ACS108-5SA
COM
OUT
COM
G
SOT223
ACS108-5SN
FUNCTIONAL DIAGRAM
OUT
ACS108
S
ON
D
Note:
For further technical information, please re-
fer to the Application note AN1172.
November 1999 -Ed: 3B
GCOM
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ACS108-5Sx
ABSOLUTE RATINGS (limitingvalues)
Symbol Parameter Value Unit
V
DRM
V
RRM
I
T(RMS)
I
TSM
dI/dt Critical rate of rise ofon-state current
V
PP
Tstg Storage temperature range - 40 to + 150 °C
Tj Operating junction temperature range 0 to+ 110 °C
Tl Maximum lead temperature for soldering during 10s 260 °C
note 1 : accordingto testdescribed byIEC 1000-4-5 standard & Figure3.
SWITCH GATE CHARACTERISTICS (maximum values)
Symbol Parameter Value Unit
P
G (AV)
I
GM
V
GM
Repetitive peak off-state voltage Tj = 25 °C 500 V
RMS on-state current full cycle sine
wave 50 to 60 Hz
TO92 Tlead =60 °C 0.8 A
TO92 Tamb = 60 °C 0.3 A
SOT223 Tamb =55 °C 0.8 A
Non repetitive surge peak on-state current
Tj initial = 25⊃C, full cycle sinewave
= 20mA with tr = 100ns
I
G
Non repetitive line peak pulse voltage
F =50 Hz 7.3 A
F =60 Hz 8 A
Repetitive
20 A/µs
F =120 Hz
note 1
2kV
Average gate power dissipation 0.1 W
Peak gate current (tp = 20µs) 1 A
Peak positive gate voltage (respect to the pin COM) 5 V
THERMAL RESISTANCES
Symbol Parameter Value Unit
Rth (j-a) Junction to ambient TO92 150 °C/W
SOT223 (*) 60 °C/W
Rth (j-l) Junction to lead for full AC linecycle conduction TO92 60 °C/W
Rth (j-t) Junction to tabfor full AC line cycle conduction SOT223 25 °C/W
(*) : with5cm2copper(e=35µm) surface under tab
ELECTRICAL CHARACTERISTICS
Foreither positive or negativepolarityof pinOUT voltage respectto pinCOM voltage
Symbol Test Conditions Values Unit
I
GT
V
GT
V
GD
I
H
I
L
V
TM
I
DRM
I
RRM
dV/dt V
(dI/dt)c (dV
V
CL
V
=12V (DC) RL=140Ω Tj=25°C MAX 10 mA
OUT
V
=12V (DC) RL=140Ω Tj=25°C MAX 1 V
OUT
V
OUT=VDRMRL
I
= 100mA gate open Tj=25°C TYP 25 mA
OUT
=3.3kΩ Tj=110°C MIN 0.2 V
MAX 60 mA
IG= 20mA Tj=25°C TYP 30 mA
MAX 65 mA
IOUT = 1.1A tp=380µs Tj=25°C MAX 1.3 V
V
OUT=VDRM
V
OUT=VRRM
=400V gate open Tj=110°C MIN 500 V/µs
OUT
/dt)c=10V/µs Tj=110°C MIN 0.1 A/ms
OUT
Tj=25°C MAX 2 µA
Tj=110°C MAX 50 µA
ICL = 1mA tp=1ms Tj=25°C TYP 600 V
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ACS108-5Sx
AC LINE SWITCH BASIC APPLICATION
The ACS108 device is well adapted to washing machine, dishwasher, tumble drier, refrigerator, water
heater andcookware. Ithas beendesigned especiallyto switchON andOFF low power loads such as solenoid, valve, relay, micro-motor,fan, pump, door lock and low wattage lamp bulb.
Pin COM: Common drive reference to connect to the power line neutral
Pin G: SwitchGate input to connect to the digital controller
Pin OUT: Switch Output to connect to the Load
The ACS switch is triggered with anegative gatecurrent flowingoutof thegate pinG. Itcan be driven di-
rectly by the digital controllerthrough a resistor as shown on the typical application diagram. Note that no
protection device (zener or capacitor)should be added between gates and common terminals.
The SOT223version allowsseveral ACS108devices to beconnected on thesame coolingPCB padwhich
is the COM pin : this cooling pad can be then reduced, and the printed circuit layout is simplified.
In appliances systems, the ACS108 switch intends to drive low power load in full cycle ON / OFF mode.
When thegate signalis removed,the load is switchedoff after a delay timethat isequal toone halfline cycle or one full line cycle depending on the load drive strategy.
The turn off commutation characteristicsof these loads can be classified in 3 groups asshown in table 1.
Thanks to its thermaland turn off commutation performances, the ACS108 switch is able to drive with no
additional turn off snubber, aresistive or inductive load up to 0.2 A (when this load has to switch offwithin
one half AC line cycle), an inductive load up to 0.6 A or a resistive load up to 0.8A (when this load hasto
switch off withinone full AC line cycle).
Table 1: Load grouping versustheir turn off commutation requirement (230V AC applications).
LOAD
IRMS
POWER
FACTOR
(A)
(dI/dt)c
(A/ms)
(dV/dt)c
(V/µs)
TURN-FF
DELAY
Door LockLamp < 0.3 1 0.15 0.15 <10
< 0.8 1 0.4 0.15 < 20
Relay Valve
< 0.1 > 0.7 < 0.05 < 5 < 10
Dispenser
Micro-motor
Pump Fan < 0.2 > 0.2 < 0.1 < 10 < 10
< 0.6 > 0.2 < 0.3 < 10 < 20
TYPICAL APPLICATION DIAGRAM
L
MAINS
N
AC
D
LOAD
L
R
OUT
S
ON
ACS108
(ms)
-Vcc
COM
G
ST 72 MCU
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