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ACS102-5Tx
October 2001 - Ed: 7B
AC LINE SWITCH
TO-92
ACS102-5TA
s
Blocking voltage : V
DRM
/ V
RRM
= 500V
s
Clamping voltage : V
CL
= 600 V
s
Nominal current : I
T(RMS)
= 0.2 A
s
Gate triggering current : I
GT
< 5 mA
s
Switch integrated driver
s
Triggering current is sourced by the gate
s
SO-8 package:
- drive reference COM connected to 2 cooling pins
- 3.5 mm creepage distance from pin OUT to other
pins
FEATURES
The ACS102 belongs to the AC line switch family
built around the ASDTM concept. This high perfor-
mance device is able to control an up to 0.3 A load
device.
The ACSTM switch embeds a high voltage clamp-
ing 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
AN1172 application note.
DESCRIPTION
OUT
COM
G
s
Needs no external overvoltage protection
s
Enables equipment to meet IEC61000-4-5 &
IEC 335-1
s
Reduces component count by up to 80 %
s
Interfaces directly with a microcontroller
s
Eliminates any stressing gate kick back on
microcontroller
s
Allows straightforward connection of several
ACSTM on same cooling pad.
BENEFITS
G
COM
OUT
ON
S
D
ACS102
FUNCTIONAL DIAGRAM
ASDTM
AC Switch Family
SO-8
ACS102-5T1
NC
NC
COM
COM
G
NC
NC
OUT
s
AC on-off static switching in appliance &
industrial control systems
s
Drive of low power high inductive or resistive
loads like
- relay, valve, solenoid, dispenser
- pump, fan, micro-motor
- low power lamp bulb, door lock
MAIN APPLICATIONS
NC: Not Connected
ASD and ACS are a trademarks of STMicroelectronics.
ACS102-5Tx
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Symbol
Parameter
Value
Unit
V
DRM
/ V
RRM
Repetitive peak off-state voltage
Tj = 125 C
500
V
I
T(RMS)
RMS on-state current full cycle sine
wave 50 to 60 Hz
TO-92
Tamb = 100 C
0.2
A
SO-8
Tamb = 100 C
0.2
A
I
TSM
Non repetitive surge peak on-state current
Tj initial = 25C, full cycle sine wave
F =50 Hz
7.3
A
F =60 Hz
8
A
dI/dt
Critical rate of repetitive rise of on-state current
I
G
= 10mA with tr = 100ns
F =120 Hz
20
A/
s
V
PP
Non repetitive line peak pulse voltage
note 1
2
kV
Tstg
Storage temperature range
- 40 to + 150
C
Tj
Operating junction temperature range
- 30 to + 125
C
Tl
Maximum lead temperature for soldering during 10s
260
C
Note 1: according to test described by IEC61000-4-5 standard & Figure 3.
ABSOLUTE RATINGS (limiting values)
Symbol
Parameter
Value
Unit
P
G (AV)
Average gate power dissipation
0.1
W
I
GM
Peak gate current (tp = 20
s)
1
A
V
GM
Peak positive gate voltage (respect to the pin COM)
5
V
SWITCH GATE CHARACTERISTICS (maximum values)
Symbol
Parameter
Value
Unit
Rth (j-a)
Junction to ambient
TO-92
150
C/W
SO-8 *
150
C/W
Rth (j-l)
Junction to leads for full AC line cycle conduction
TO-92
60
C/W
* with 40mm2 copper (ex: 35
m) surface under "com" pins
THERMAL RESISTANCES
Symbol
Test Conditions
Values
Unit
I
GT
V
OUT
=12V
R
L
=140
Tj=25C
MAX
5
mA
V
GT
V
OUT
=12V
R
L
=140
Tj=25C
MAX
0.9
V
V
GD
V
OUT
=V
DRM
R
L
=3.3k
Tj=125C
MIN
0.15
V
I
H
I
OUT
= 100mA gate open
Tj=25C
TYP
20
mA
MAX
tbd
I
L
I
G
= 20mA
Tj=25C
TYP
25
mA
MAX
tbd
V
TM
I
OUT
= 0.3A
tp=380
s
Tj=25C
MAX
1.2
V
I
DRM
I
RRM
V
OUT
= V
DRM
V
OUT
= V
RRM
Tj=25C
MAX
2
A
Tj=125C
MAX
200
dV/dt
V
OUT
=400V gate open
Tj=110C
MIN
300
V/
s
(dI/dt)c
*(Note 3)
(dV/dt)c = 5V/
s
I
OUT
> 0
Tj=110C
MIN
0.1
A/ms
(dV/dt)c = 10V/
s I
OUT
< 0
0.15
V
CL
I
CL
= 1mA
tp=1ms
Tj=25C
TYP
600
V
tbd = to be defined
ELECTRICAL CHARACTERISTICS
For either positive or negative polarity of pin OUT voltage respect to pin COM voltage excepted note 3*.
ACS102-5Tx
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The ACS102 device is well adapted to washing machines, dish washers, tumble driers, refrigerators, water
heaters, and cookware. It has been designed especially to switch on & off low power loads such as sole-
noids, valves, relays, dispensers, micro-motors, pumps, fans, door locks, and low power lamps bulbs.
Pin COM
: Common drive reference, to connect to the power line neutral
Pin G
: Switch Gate input to connect to the digital controller through a resistor
Pin OUT
: Switch Output, to connect to the load
This ACSTM switch is triggered with a negative gate current flowing out of the gate pin G. It can be driven di-
rectly by the digital controller through a resistor as shown on the typical application diagram. No protection
device are required between the gate and COM terminals.
The SO-8 version allows to connect several ACS102 devices on the same cooling PCB pad which is the
COM pin.
In appliance systems, the ACS102 switch intends to drive low power loads in full cycle ON / OFF mode.
The turn off commutation characteristics of these loads are described in Table 1.
Thanks to its thermal and turn-off commutation characteristics, the ACS102 switch drives a load, such as
door lock, lamp, relay, valve and micro motor, up to 0.2A without any turn-off aid circuit. Switching off the
ACS within one full AC line cycle will extend its current up to 0.3 A.
AC LINE SWITCH BASIC APPLICATION
LOAD
Load IRMS
current
(A)
POWER
FACTOR
(dI/dt)c
(A/ms)
(dV/dt)c
(V/
s)
TURN-OFF
DELAY
(ms)
Door lock, lamp
< 0.2
1
< 0.1
< 0.15
< 10
Relay Valve
Dispenser
Micro-motor
< 0.2
> 0.7
< 0.1
< 5
< 10
Pump Fan
< 0.3
> 0.2
< 0.15
< 10
< 20
Table 1: Low power load turn off commutation requirement (230V AC applications).
AC
MAINS
L
N
ST 72 MCU
LOAD
- Vcc
L
R
G
COM
OUT
ACS102
ON
S
D
TYPICAL APPLICATION DIAGRAM
ACS102-5Tx
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At the end of the last conduction half-cycle, the load current reaches the holding current level I
H
, and the
ACSTM 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 V
CL
.
The energy stored in the inductance of the load depends on the holding current I
H
and the inductance (up
to 10 H); it can reach about 20 mJ and is dissipated in the clamping diode section. The ACSTM switch sus-
tains the turn off energy, because its clamping section is designed for that purpose.
HIGH INDUCTIVE SWITCH-OFF OPERATION
T
ime (400s/div)
I
OUT
(10 mA/div)
V
OUT
(200V/div)
I
H
V
CL
= 650V
Fig. 1: Turn-off operation of the ACS102 switch
with an electro valve: waveform of the gate current
I
G
, pin OUT current I
OUT
& voltage V
OUT
.
I
H
V
CL
I
OUT
V
OUT
Fig. 2: ACS102 switch static characteristic.
The ACS102 switch is able to withstand safely the AC line transient voltages either by clamping the low en-
ergy spikes or by breaking over under high energy shocks.
The test circuit of the figure 3 is representative of the final ACSTM application and is also used to stress the
ACSTM switch according to the IEC61000-4-5 standard conditions. Thanks to the load, the ACSTM 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 rate of increase is high as shown on figure 4. Such non repetitive test
can be done 10 times on each AC line voltage polarity.
AC LINE TRANSIENT VOLTAGE RUGGEDNESS
R
L
R
G
= 220
V
AC
+ V
PP
AC LINE &
SURGE VOLTAGE
GENERATOR
G
COM
OUT
ACSxx
ON
S
D
Fig. 3: Overvoltage ruggedness test circuit for
resistive and inductive loads according to
IEC61000-4-5 standard.
R = 150
, L = 5
H, V
PP
= 2kV.
Vout (200 V/div)
Iout (2.5 A/div)
dI/dt = 70 A/s
Fig. 4: Current and Voltage of the ACSTM during
IEC61000-4-5 standard test with R = 150
, L = 5
H
& V
PP
= 2kV.
ACS102-5Tx
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0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.18 0.20
0.00
0.02
0.04
0.06
0.08
0.10
0.12
0.14
0.16
0.18
0.20
IT(RMS)(A)
P(W)
Fig. 5: Maximum power dissipation versus RMS
on-state current.
0
20
40
60
80
100
120
140
0.00
0.05
0.10
0.15
0.20
0.25
Tamb(C)
IT(RMS)(A)
Fig. 6:
RMS on-state current versus ambient
temperature.
1E-3
1E-2
1E-1
1E+0
1E+1
1E+2 5E+2
0.01
0.10
1.00
tp(s)
Zth(j-a) / Rth(j-a)
Fig. 7-1: Relative variation of thermal impedance
junction
to
ambient
versus
pulse
duration
(ACS102-5TA) (TO-92).
1E-3
1E-2
1E-1
1E+0
1E+1
1E+2 5E+2
0.01
0.10
1.00
tp(s)
Zth(j-a) / Rth(j-a)
Fig. 7-2: Relative variation of thermal impedance
junction to ambient versus pulse duration (printed
circuit board FR4, e(Cu) = 35
m, S(Cu) = 40mm
2
under "com" pins) (ACS102-5T1) (SO-8).
-40
-20
0
20
40
60
80
100
120
140
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Tj(C)
IGT [Tj] / IGT [Tj=25C]
Fig. 8: Relative variation of gate trigger current
versus junction temperature.
-40
-20
0
20
40
60
80
100
120
140
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
Tj(C)
IH,IL [Tj] / IH,IL [Tj=25C]
Fig. 9: Relative variation of holding and latching
current versus junction temperature.
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