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ACS302-5T3
January 2003 - Ed: 2
THREE LINES AC SWITCH ARRAY
SO-20
Wired package
s
THREE HIGH VOLTAGE AC SWITCH ARRAY
s
BLOCKING VOLTAGE: V
DRM
/ V
RRM
= 500V
s
CLAMPING VOLTAGE: V
CL
= 600 V
s
NOMINAL CONDUCTING CURRENT PER LINE:
I
T(RMS)
= 0.2 A
s
NOMINAL CONDUCTING CURRENT FOR
TOTAL ARRAY:
I
T(RMS)
= 0.4 A
s
GATE TRIGGERING CURRENT: I
GT
< 5 mA
FEATURES
The ACS302 belongs to the AC line switch family
built around the ASDTM concept. This high
performance device inludes 3 bidirectionnal AC
switches able to control an 0.2A resistive or
inductive load device.
Each ACSTM 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.
DESCRIPTION
s
Needs no external overvoltage protection
s
Enables equipment to meet IEC61000-4-5
standard
s
Interfaces directly with a microcontroller
s
Eliminates any stressing gate kick back on the
microcontroller
s
Array structure: design simplified, increase
reliability and space saving aspects
s
Mounting in SO-20 package enables the device
to meet IEC335-1 standard
BENEFITS
OUT1
OUT2
OUT3
ACS302
COM
G1
G2
G3
S1
S2
S3
FUNCTIONAL DIAGRAM
ASDTM
AC Switch Family
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
ASD and ACS are trademarks of STMicroelectronics.
3.81cm = 1.5''
2.54cm = 1''
11.2cm = 2.54''
8.5cm
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
OUTPUT 1
COM
OUTPUT 3
OUTPUT 2
GATE 1
GATE 2
GATE 3
COM
Pin 1
Pin 11
Pins 2, 3, 4, 6, 7, 8, 10,
and 19, 17, 15, 14, 12
.
are not connected
PIN-OUT
ACS302-5T3
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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
Tamb = 110 C One switch on = 0.2
A
Tamb = 90 C
Array: 0.4
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
7.6
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 and 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 = 20s)
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
93
C/W
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
45
I
L
I
G
= 10mA
Tj=25C
TYP
25
mA
MAX
50
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
(dV/dt)c = 5V/
s
I
OUT
> 0
Tj=110C
MIN
0.1
A/ms
(dV/dt)c = 10V/s I
OUT
< 0
Tj=110C
MIN
0.15
A/s
V
CL
I
CL
= 1mA
tp = 1ms
Tj=25C
TYP
600
V
ELECTRICAL CHARACTERISTICS
ACS302-5T3
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Symbol
Parameter
I
GT
Triggering gate current
V
GT
Triggering gate voltage
V
GD
Non-triggering gate voltage
I
H
Holding current
I
L
Latching current
V
TM
Peak on-state voltage drop
V
t0
On-state threshold voltage
R
d
On-state dynamic resistance
I
DRM
/I
RRM
Maximum forward or reverse leakage
current
dV/dt
Critical rate of rise of off-state voltage
(dV/dt)
c
Critical rate of decrease of commutating
off-state voltage
(dI/dt)
c
Critical rate of decrease of commutating
on-state current
V
CL
Clamping voltage
I
CL
Clamping current
ELECTRICAL CHARACTERISTICS
The ACS302 device is well adapted to washing
machines, dishwashers, tumble driers, refrigera-
tors, water heaters, and cookwares. It has been
designed especially to switch ON & OFF low
power loads such as solenoids, valves, relays, mi-
cro-motors, pumps, fans, door locks and low
power lamp bulbs.
s
Pin COM: Common drive reference, to connect
to the power line neutral
s
Pin G: Switch Gate input to connect to the digital
controller through a resistor
s
Pin OUT: Switch Output, to connect to the load
Each ACSTM 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 protection devices are required
between the gates and common terminals.
AC LINE SWITCH BASIC APPLICATION
PA0
PA1
PA2
Vcc
Vss
ST72 MCU
M
N
L
VALVE / DISPENSER
DOOR LOCK
PUMP / FAN
MAINS
OUT1
OUT2
OUT3
ACS302
COM
G1
G2
G3
S1
S2
S3
TYPICAL APPLICATION DIAGRAM
In appliances systems, this ACSTM switch intends to drive low power loads in full cycle ON / OFF mode.
Thanks to its thermal and turn off commutation performances, the ACS302-5TA switch is able to drive
three loads up to 0.2A each, as, for example, two water valves and a door lock in a dishwasher, without any
additionnal turn-off snubber.
ACS302-5T3
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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 that is especially designed
for that purpose.
HIGH INDUCTIVE SWITCH-OFF OPERATION
Fig. 1: Turn-off operation of the ACS302 switch
with an electro valve: waveform of the pin OUT
current I
OUT
& voltage V
OUT
.
V
OUT
I
OUT
V
CL
I
H
Fig. 2: ACS302 switch static characteristic.
The ACS302 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
ACS 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 rise 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
L
R
V
AC
+ V
PP
SURGE VOLTAGE
AC LINE & GENERATOR
COM
OUT
G
ACS302
Fig. 3: Overvoltage ruggedness test circuit for
resistive and inductive loads according to
IEC61000-4-5 standard.
R = 150
, L = 5H, V
PP
= 2kV.
Fig. 4: Current and Voltage of the ACSTM during
IEC61000-4-5 standard test with R = 150
, L = 5
H
& V
PP
= 2kV.
ACS302-5T3
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P(W)
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
I
(A)
T(RMS)
= 180
180
Fig. 5: Maximum power dissipation versus RMS
on-state current (per switch).
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0
25
50
75
100
125
I
(A)
T(RMS)
T
(C)
amb
= 180
3 switches ON
1 switch ON
Fig. 6:
RMS on-state current versus ambient
temperature.
K=[Z
/ R
]
th(j-a)
th(j-a)
1.E-03
1.E-02
1.E-01
1.E+00
1.E-04
1.E-03
1.E-02
1.E-01
1.E+00
1.E+01
1.E+02
1.E+03
1 cell
3 cells
t (s)
p
Fig. 7: Relative variation of thermal impedance
junction to ambient versus pulse duration .
I
[T ] / I
[T =25C]
GT
j
GT
j
0.0
0.5
1.0
1.5
2.0
2.5
3.0
-40 -30 -20 -10
0
10 20
30
40 50
60
70 80
90 100 110 120 130
T (C)
j
Fig. 8: Relative variation of gate trigger current
versus junction temperature (typical value).
I ,I [T ] / I ,I [T =25C]
L H
j
L H
j
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
-40 -30 -20 -10
0
10 20
30
40 50
60
70 80
90 100 110 120 130
T (C)
j
Fig. 9: Relative variation of holding and latching
current
versus
junction
temperature
(typical
values).
I
(A)
TSM
0
1
2
3
4
5
6
7
8
1
10
100
1000
Number of cycles
One cycle
t=20ms
Tj initial=25C
Non repetitive
Tamb=25C
Repetitive
Fig. 10: Surge peak on-state current versus
number of cycles.
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