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ACS402-5SB4
QUAD AC LINE SWITCH ARRAY
ACS402-5SB4QUAD AC LINE SWITCH ARRAYn 4 high voltage AC switch array Blocking voltage: VDRM /VRRM= 500V Clamping voltage: VCL= 600V Nominal current: IT(RMS)= 0.2A per switch Nominal current: IT(RMS) = 0.4A for the total
array Switch integrated driver Triggering currentis sourcedby the gate Gate triggering current: IGT <10mA
FEATURESThe ACS402 belongsto the AC line switches array
family built around the ASD™ concept. This high
performance device includes4 bi-directional a.c.
switches ableto controlan 0.2A resistiveor induc-
tive load device.
Each ACS™ switch integratesa high voltage
clamping structureto absorb the inductive turnoff
energy anda gate level shifter driverto separate
the digital controller from each main switch.Itis
triggered witha negative gate current flowing out the gate pin.
For further technical information, please referto
AN1172 the Application note.
DESCRIPTION Needsno external overvoltage protection. Enables the equipmentto meet IEC61000-4-5standard. Miniaturizes4 switchesin1 package. Reduces the switch component count by upto
80%. Interfaces directly with the microcontroller. Eliminates any stressing gate kick backon the
microcontroller.
BENEFITS
PIN OUT CONNECTION AC on-off static switching in appliance &industrial control systems Driveof low power high inductiveor resistiveloads like: relay, valve, solenoid, dispenser- pump, fan, micro-motor low power lamp bulb, door lock
MAIN APPLICATIONSASD™ Switch Family
ASD andACS area trademarksof STMicroelectronics.
FUNCTIONAL DIAGRAM
ACS402-5SB4
Note1: accordingtotest describedby IEC61000-4-5 standard& Figure3.
ABSOLUTE RATINGS (limiting values)
SWITCH GATE CHARACTERISTICS (maximum values)
THERMAL RESISTANCE
ELECTRICAL CHARACTERISTICS PER SWITCHFor either positiveor negative polarityof pin OUT1, OUT2, OUT3, OUT4 voltage respectto pin COM voltage.
ACS402-5SB4(*): Measured withan ACS402 switch
Table1: Load grouping versus their turnoff commutation requirement (230V AC applications).
TYPICAL APPLICATION DIAGRAMThe ACS402 deviceis well adaptedto washing machines, dishwashers, tumble driers, refrigerators, water
heaters and cookware.It has been designed especiallyto switch ON and OFF low power loads suchas so-
lenoids, valves, relays, micro-motors, pumps, fans, door locks and low power lamp bulbs.
Pin COM: Common drive referenceto connectto the power line neutral
PinG: Switch Gate inputto connectto the digital controller through the resistor
Pin OUT: Switch Outputto connectto the load
Each ACS™ switchis triggered witha negative gate current flowing outof the gate pinG.It canbe driven
directlyby the digital controller througha resistoras shownon the typical application diagram. No protec-
tion device are required between the gates and common terminals. appliance systems, this ACS™ switch intendsto drive low power loadin full cycle ON/ OFF mode. The
turnoff commutation characteristicsof these loads canbe classifiedin3 groupsas shownin Table1.
Thankstoits thermal and turn-off commutation performance, each switchof the ACS402is ableto drive inductiveor resistive loadupto 0.2A withno additional turn-off snubber.
LINE SWITCH BASIC APPLICATION
ACS402-5SB4
Each ACS402 switchis ableto safely withstand the AC line transient voltages eitherby clamping the low
energy spikesorby breaking over under high energy shocks.
The test circuitin Figure3is representativeof the final ACS™ application andis also usedto stress the
ACS™ switch accordingto the IEC61000-4-5 standard conditions. Thanksto the load, the ACS™ switch
withstands the voltage spikesupto2kV above the peak line voltage.It will break over safely evenon resis-
tive load where the turn-on current riseis highas shownin Figure4. Such non repetitive test canbe done timeson each AC line voltage polarity. LINE TRANSIENT VOLTAGE RUGGEDNESS
Fig3: Overvoltage ruggedness test circuitfor resistive
and inductive loads according to IEC61000-4-5
standard.= 150Ω,L=5μH, VPP= 2kV.
Fig4: Current and voltageof the ACS™ during
IEC61000-4-5 standard test witha 150Ω -10μH
load& VPP= 2kV.
Fig1: Turn-off operationof the ACS402 switch
withan electro valve: waveformof the gate current
IG, pin OUT current IOUT& voltage VOUT. the endof the last conduction half-cycle, the load current reaches the holding current levelIH, and the
ACS™ switch turns off. Becauseof the inductanceLof the load, the current flows through the avalanche
diodeD and decreases linearlyto zero. During this time, the voltage across the switchis limitedto the
clamping voltage VCL.
The energy storedin the inductanceof the load dependson theholding currentIH and the inductance (upto H);it can reach about20 mJ andis dissipatedin the clamping section thatis especially designedfor that
purpose.
HIGH INDUCTIVE SWITCH-OFF OPERATION
Fig2: ACS402 switch static characteristic.
ACS402-5SB4
0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.400.00
P(W)
Fig.5: Maximum power dissipation versus RMS
on-state current (per switch). 25 50 75 100 1250.00
IT(RMS)(A)
Fig.6: RMS on-state current versus ambient
temperature.
1E-4 1E-3 1E-2 1E-1 1E+0 1E+1 1E+2 5E+21E-3
1E-2
1E-1
1E+0
Zth(j-a)/Rth(j-a)
Fig.7: Relative variationof thermal impedance
junctionto ambient versus pulse duration (device
mounted on printed circuit board FR4, e(Cu)=
35μm)
-40 -20 0 20 40 60 80 100 120 140
IGT [Tj] / IGT [Tj=25°C]
Fig.8: Relative variationof gate trigger current
versus junction temperature.
-40 -20 0 20 40 60 80 100 120 1400.0
IH,IL [Tj] / IH,IL [Tj=25°C]
Fig.9: Relative variationof holding and latching
current versus junction temperature. 10 100 10000
ITSM(A)
Fig. 10: Surge peak on-state current versus
numberof cycles.
ACS402-5SB4 10 20 30 40 50 60 70 80 90 100 110 1200.0
(dI/dt)c [Tj] / (dI/dt)c [Tj=110°C]
Fig. 13: Relative variationof critical (dI/dt)c versus
junction temperature.
0.01 0.10 1.00 10.000.1
ITSM(A),I²t(A²s)
Fig. 11: Non-repetitive surge peak on-state
currentfora sinusoidal pulse with widthtp< 10ms,
and corresponding valueofI2t.
0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.60.01
ITM(A)
Fig. 12: On-state characteristics (maximum
values).
