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ACS402-5SB4
November 1999 - Ed: 3B
QUAD AC LINE SWITCH ARRAY
DIL20
n
4 high voltage AC switch array
n
V
DRM
/ V
RRM
= 500V
n
Avalanche controlled device
n
I
T(RMS)
= 0.2 A per switch
n
I
T(RMS
) = 0.4 A for the total array
n
Gate triggering current : I
GT
< 10 mA
n
Switch integrated driver
FEATURES
The ACS402 belongs to the AC line switches array
family built around the ASDTM concept. This high
performance planar technology device includes 4
bi-directional a.c. switches able to control an 0.2 A
resistive or inductive load.
Each ACSTM switch integrates a high voltage
clamping structure to absorb the inductive turn off
energy and a gate level shifter driver to separate
the digital controller from each main switch. It is
triggered with a negative gate current flowing out
of the gate pin.
DESCRIPTION
n
Miniaturizes 4 switches in 1 package.
n
Reduces the switch component count by up to 80%.
n
Needs no more external protection snubber &
varistor.
n
Enables the equipment to meet IEC1000-4-5
standard.
n
Interfaces directly with the microcontroller.
n
Eliminates any stressing gate kick back on the
microcontroller.
BENEFITS
FUNCTIONAL DIAGRAM
PIN OUT CONNECTION
OUT1
OUT2
OUT3
OUT4
1
G1
G2
G3
G4
COM
COM
ON
G1
G2
G3
G4
Com
OUT1
OUT2
OUT3
OUT4
ON
S1
D1
S2
D2
S3
D3
S4
D4
ACS402
ON
ON
note : pins 1, 3, 5, 7, 9, 12, 14, 16, 18, 20 not connected.
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 power lamp bulb
- pump
- fan
MAIN APPLICATIONS
ASDTM
AC Switch Family
Note:
For further technical information, please refer to the Application note AN1172
ACS402-5SB4
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Symbol
Parameter
Value
Unit
V
DRM
V
RRM
Repetitive peak off-state voltage
Tj = 25 C
500
V
I
T(RMS)
RMS on-state current full cycle sine
wave 50 to 60 Hz
per switch
Tamb = 90 C
0.2
A
total array
Tamb = 75 C
0.4
A
I
TSM
Non repetitive surge peak on-state current
Tj initial = 25C, full cycle sine wave
F =50 Hz
5
A
F =60 Hz
5.5
A
dI/dt
Critical rate of rise of on-state current
I
G
= 20mA with tr = 100ns
Repetitive
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
0 to + 110
C
Tl
Maximum lead temperature for soldering during 10s
260
C
note 1 : according to test described by IEC 1000-4-5 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
90
C/W
THERMAL RESISTANCE
Symbol
Test conditions
Values
Unit
I
GT
V
D
= 12V
(DC) R
L
= 140
Tj=25C
MAX
10
mA
V
GT
V
D
= 12V
(DC) R
L
= 140
Tj=25C
MAX
1
V
V
GD
V
OUT
= V
DRM
R
L
= 3.3k
Tj=110C
MIN
0.2
V
I
H
I
OUT
= 100mA gate open
Tj=25C
TYP
25
mA
MAX
60
mA
I
L
I
G
= 20mA
Tj=25C
TYP
30
mA
MAX
65
mA
V
TM
I
OUT
= 0.3A
tp = 380
s
Tj=25C
MAX
1.1
V
I
DRM
I
RRM
V
OUT
= V
DRM
V
OUT
= V
RRM
Tj=25C
MAX
2
A
Tj=110C
MAX
50
A
dV/dt
V
OUT
= 400V gate open
Tj=110C
MIN
500
V/
s
(dI/dt)c
(dV
OUT
/dt)c = 10V/
s
Tj=110C
MIN
0.1
A/ms
V
CL
I
CL
= 1mA
tp = 1ms
Tj=25C
TYP
600
V
ELECTRICAL CHARACTERISTICS PER SWITCH
For either positive or negative polarity of pin OUT1, OUT2, OUT3, OUT4 voltage respect to pin COM voltage
ACS402-5SB4
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The ACS402 device is well adapted to washing machine, dishwasher, tumble drier, refrigerator, water
heater and cookware. It has been designed especially to switch ON and OFF low power loads such as so-
lenoid, valve, relay, micro-motor, pump, fan, door lock and low wattage lamp bulb.
Pin COM:
Common drive reference to connect to the power line neutral
Pin G:
Switch Gate input to connect to the digital controller
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. Note that no
protection device (zener or capacitors) should be added between gates and common terminals.
In appliances systems, this ACSTM 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 performances, each switch of the ACS402 is able to drive
an inductive or resistive load up to 0.2 A with no additional turn off snubber.
AC LINE SWITCH BASIC APPLICATION
LOAD
IRMS
(A)
POWER
FACTOR
(dI/dt)c
(A/ms)
(dV/dt)c
(V/
s)
TURN-OFF
DELAY
(ms)
Door lock Lamp
< 0.3
1
0.15
0.15
< 10
< 0.6
1
0.4
0.15
< 20
Relay Valve
Dispenser
Micro-motor
< 0.1
> 0.7
< 0.05
< 5
< 10
Pump Fan
< 0.2
> 0.2
< 0.1
< 10
< 10
< 0.6
> 0.2
< 0.3
< 10
< 20
Table 1: Load grouping versus their turn off commutation requirement (230V AC applications).
TYPICAL APPLICATION DIAGRAM
MAINS
L
N
VALVE / DISPENSER
DOOR LOCK
RELAY
PUMP/FAN
M
G1
G2
G3
G4
COM
OUT1
OUT2
OUT3
OUT4
ACS402
PA0
ST72 MCU
PA1
PA3
PA2
Vcc
Vss
ON
ON
S1
D1
S2
D2
S3
D3
S4
D4
ON
ON
ACS402-5SB4
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Each ACS402 switch is able to sustain safely the AC line transient voltages either by clamping the low en-
ergy spikes or by breaking over under high energy shocks, even with high turn-on current rises.
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 IEC1000-4-5 standard conditions. Thanks to the load, the ACSTM switch
sustains the voltage spikes up to 2 kV above the peak line voltage. It will break over safely even on resistive
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
Fig 3: Overvoltage ruggedness test circuit for
resistive and inductive loads according to IEC
1000-4-5 standard.
R = 150
, L = 5
H, V
PP
= 2kV.
Iout (2 A /div)
Vout (200 V/div)
dI/dt = 100 A /s
Fig 4: Current and voltage of the ACSTM during
IEC 1000-4-5 standard test with a 220
- 10
H
load & V
PP
= 2kV.
Fig 1: Turn-off operation of the ACS402 switch
with an electro valve: waveform of the gate current
I
G
, pin OUT current I
OUT
& voltage V
OUT
.
T
ime (400s/div)
I
OUT
(10 mA/div)
V
OUT
(200V/div)
I
H
V
CL
= 650V
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 section that is especially designed for that
purpose.
SWITCH-OFF OPERATION
Fig 2: ACS402 switch static characteristic.
I
H
V
CL
I
OUT
V
OUT
R
L
R
G
= 220
V
AC
+ V
PP
AC LINE &
SURGE VOLTAGE
GENERATOR
G
COM
OUT
ACSxx
ON
S
D
ACS402-5SB4
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0
25
50
75
100
125
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
IGT[Tj]/IGT[Tj=25C]
Tj(C)
Fig 5: Relative variation of gate trigger current
versus junction temperature
0
25
50
75
100
125
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
IH[Tj]/IH[Tj=25C] & IL[Tj]/IL[Tj=25C]
Tj(C)
Fig 6:
Relative variation of holding & latching
currents versus junction temperature
0.5
0.75
1
1.25
1.5
1.75
2
0.05
0.07
0.1
0.2
0.3
0.4
0.5
0.6
0.8
1
2
5
IOUT (A)
VTM (V)
Fig 7: On state characteristics @Tj max
V
TO
= 0.90 V & R
T
= 0.3
(maximum values)
Pon
V
I
R x I
TO
T RMS
T
T RMS
=
+
. .
.
(
)
(
)
2
2
2
Ambient Temperature (C)
RMS current
Maximum
(A)
Total
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0
20
40
60
80
100
120
Fig 8: Maximum total RMS current versus ambient
temperature on an inductive load (PF>0.1) and a
low repetitive rate (F<1Hz)
1E-4
1E-3
1E-2
1E-1
1E+0
1E+1
1E+2 5E+2
1E-3
1E-2
1E-1
1E+0
Zth(j-a)/Rth(j-a)
1 switch
4 switches
tp (s)
Fig 9: Relative variation of thermal impedance
junction to ambient versus pulse duration (epoxy
printed circuit board FR4, 35
m copper layout
thickness).
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