Datasheet ACS108-5SN, ACS108-5SA Datasheet (SGS Thomson Microelectronics)

Page 1
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
T(RMS)
/V
= 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 ASDconcept. 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 = 25C, 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=140 Tj=25°C MAX 10 mA
OUT
V
=12V (DC) RL=140 Tj=25°C MAX 1 V
OUT
V
OUT=VDRMRL
I
= 100mA gate open Tj=25°C TYP 25 mA
OUT
=3.3k 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 ACSswitch 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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Page 4
ACS108-5Sx
INDUCTIVE SWITCH-OFF OPERATION
At the end of the last conduction half-cycle, the load current reaches the holding current level IH, and the ACSswitch turns off. Becauseof 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 storedinthe inductance ofthe load depends ontheholding currentIHand theinductance (up to 10 H);it can reachabout 20 mJ and is dissipated in theclamping sectionthatis especiallydesigned forthat purpose.
Fig 1: Turn-off operation of the ACS108 switch
Fig 2: ACS108 switch static characteristic.
with an electro valve: waveformof the gate current IG, pin OUT current I
IOUT
(10 mA/div)
I
H
OUT
V
(200V/div)
& voltage V
OUT
.
OUT
VCL = 650V
Time (400µs/div)
IOUT
IH
VOUT
VCL
AC LINE TRANSIENT VOLTAGE RUGGEDNESS
The ACS108 switch is able to sustain safely the AC line transient voltages either by clamping the low en­ergy spikes or by breaking over under high energy shocks, even with high turn-on current rises.
The testcircuit of the figure 4 isrepresentative of the final ACSapplication andis alsoused to stressthe ACSswitch according to the IEC1000-4-5 standard conditions. Thanks to the load, the ACSswitch sustains the voltagespikes up to2kV abovethepeak linevoltage. Itwill breakover safelyeven 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.
Fig 3: Overvoltage ruggedness test circuit for resistive and inductive loads according to IEC 1000-4-5 standard. R = 150,L=5µH, VPP= 2kV.
RL
ACLINE &
SURGEVOLTAGE
GENERATOR
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VAC +VPP
OUT
ACSxx
S
ON
D
GCOM
RG= 220
Fig 4: Current and voltage of the ACSduring IEC 1000-4-5 standard test with a 220-10µH load & VPP= 2kV.
Vout (200 V/div)
Iout (2 A/div)
dI/dt = 100 A/µs
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ACS108-5Sx
Fig 5: Relative variation of gate trigger current
versus junction temperature
IGT[Tj]/IGT[Tj=25°C]
2.00
1.75
1.50
1.25
1.00
0.75
0.50
0.25
0.00 0 25 50 75 100 125
Tj(°C)
Fig 7: On state characteristics @Tj max
VTO= 0.90V &RT= 0.3(maximumvalues)
Pon V I R x I
=+.. .
22
TO T RMS T T RMS
IOUT (A)
5
2
1
0.8
0.6
0.5
0.4
0.3
0.2
0.1
0.07
0.05
0.5 0.75 1 1.25 1.5 1.75 2
() ()
Π
VTM (V)
2
Fig 6: Relative variation of holding & latching
currents versus junction temperature
IH[Tj]/IH[Tj=25°C] & IL[Tj]/IL[Tj=25°C]
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0 0 25 50 75 100 125
Tj(°C)
Fig 8: Maximum RMS switch current versus
ambient temperature on inductive load (PF>0.1) and a low repetitive rate (F < 1 Hz) (*): with 5cm2copper (e=35µm) surface under tab
IT(RMS) (A)
1
0.8
0.6
0.4
0.2
0
TO92
Tamb(°C)
0 102030405060708090100110120
SOT223(*)
Fig 9-1: Relative variation of the junction to
ambient thermal impedance versus conducting pulse duration forthe SOT223 Standard foot print with 35µm copper layout thickness.
Zth(j-a)/Rth(j-a)
1.00
0.10
0.01 1E-3 1E-2 1E-1 1E+0 1E+1 1E+2 5E+2
tp (s)
Fig 9-2: Relative variation of the junction to
ambient thermal impedance versus conducting pulse duration forthe TO92.
Zth(j-a)/Rth(j-a)
1.00
0.10
tp (s)
0.01 1E-3 1E-2 1E-1 1E+0 1E+1 1E+2 5E+2
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ACS108-5Sx
Fig. 10: SOT223 thermal resistance junction to
ambient versus copper surface under tab (Epoxy printedcircuit board FR4,copper thickness:35µm)
Rth(j-a) (°C/W)
130 120 110 100
90 80 70 60 50 40 30 20 10
0
012345
S(Cu) (cm)
ORDERING INFORMATION
ACS 1 08 - 5 S A
2
TM
ACSwitch
Number
Switch
PACKAGE MECHANICAL DATA
SOT223
A
A1
B
e1 D
B1
H
E
e
V
of
I
TRMS
08 = 0.8A
V
DRM
5 = 500V
A =TO92 N = SOT223
Gate
Sensitivity
S = 10mA
DIMENSIONS
REF.
c
A 1.80 0.071
A1 0.02 0.001
B 0.60 0.70 0.80 0.024 0.027 0.031
B1 2.90 3.00 3.10 0.114 0.118 0.122
c 0.24 0.26 0.32 0.009 0.010 0.013
D 6.30 6.50 6.70 0.248 0.256 0.264
e 2.3 0.090
e1 4.6 0.181
E 3.30 3.50 3.70 0.130 0.138 0.146 H 6.70 7.00 7.30 0.264 0.276 0.287 V10°max
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
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PACKAGE MECHANICAL DATA
SOT223
PACKAGE MECHANICAL DATA
TO92 Plastic
BAC
F
D
ACS108-5Sx
DIMENSIONS
REF.
a
A 1.35 0.053 B 4.70 0.185 C 2.54 0.100 D 4.40 0.173 E 12.70 0.500
E
F 3.70 0.146 a 0.45 0.017
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
Ordering type Marking Package Weight Base qty Deliverymode
ACS108-5SA ACS08/5S TO92 0.2g 2500 Bulk ACS108-5SN ACS/085S SOT223 0.123g 1000 Tape & reel
TM: ASD and ACSare trademarksof STMicroelectronics .
Information furnished is believedto beaccurate and reliable.However, STMicroelectronics assumes no responsibility forthe consequences of use ofsuch informationnor forany infringement of patents or other rights of third parties which mayresultfrom itsuse. Nolicense 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 publicationsupersedes and replaces all information previouslysupplied. STMicroelectronics productsare 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
1999 STMicroelectronics - Printed in Italy - All rights reserved.
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