Overvoltage protected AC switch - st.com

1 DPAKTO-220 FPABCOMOUTGCOMGOUTGCOMOUTF eatures Triac with Overvoltage protection Low IGT (<10 mA) or high immunity (IGT < 35 mA) version High noise immunity: static dV/dt > 1000 V/ s TO-220 FPAB insulated package: complies with UL standards (File ref : E81734) insulation voltage: 2000 VRMS Benefits: Enables equipment to meet IEC 61000-4-5 High off-state reliability with planar technology Needs no external Overvoltage protection Reduces the power passive component count High immunity against fast transients described in IEC 61000-4-4 standardsApplications AC mains static switching in appliance and industrial control systems Drive of medium power AC loads such as: Universal drum motor of washing machine Compressor of fridge or air conditionerDescriptionThe ACST4 series belongs to the ACS / ACST power switch family. This highperformance device is suited to home appliances or industrial systems and drivesloads up to 4 ACST4 switch embeds a Triac structure with a high voltage clamping deviceto absorb the inductive turn-off energy and withstand line transients such as thosedescribed in the IEC 61000-4-5 standards.

2 The ACST410 needs a low gate current tobe activated (IGT < 10 mA) and still shows a high electrical noise immunity complyingwith IEC standards such as IEC 61000-4-4 (fast transient burst test).Product status linkACST4 Product summaryIT(RMS)4 AVDRM/VRRM800 VIGT (ACST410)10 mAIGT (ACST435)35 mA4 A - 800 V Overvoltage protected AC switchACST4 DatasheetDS2762 - Rev 11 - May 2021 For further information contact your local STMicroelectronics sales 1. Absolute ratings (limiting values)SymbolParameterValueUnitIT(RMS)On -state rms current (full sine wave)TO-220 FPABTc = 102 C4 ADPAKTc = 112 CDPAK with cm copperTamb = 60 C1 ITSMNon repetitive surge peak on-state currentTj initial = 25 C, (full cycle sine wave)f = 50 Hztp = 20 ms32Af = 60 Hztp = ms30I2tI2t for fuse selectiontp = 10 ms6A2sdI/dtCritical rate of rise on-state current IG = 2 x IGT, tr 100 nsf = 120 HzTj = 125 C100A/ sVPP(1)Non repetitive line peak pulse voltage(1)Tj = 25 C2kVPG(AV)Average gate power dissipationTj = 125 gate power dissipation (tp = 20 s)Tj = 125 C10 WIGMPeak gate current (tp = 20 s)Tj = 125 temperature range-40 to +150 CTjOperating junction temperature range-40 to +125 CTLLead temperature for soldering during 10 s (at 3 mm from plastic case)260 CVinsInsulation rms voltage (60 seconds)2000V 1.

3 According to test described by standard IEC 61000-4-5, see Figure 17 for conditions Table 2. Electrical characteristics (Tj = 25 C, unless otherwise specified)SymbolTest conditionsQuadrantValueUnitACST410 ACST435 IGT (1)VOUT = 12 V, RL = 33 I - II - = VDRM, RL = k , Tj = 125 CI - II - (2)IOUT = 500 = x IGTI - II - (2)VOUT = 67% VDRM, gate open, Tj = 125 s(dI/dt)c(2)Without snubber, Tj = 125 (dI/dt)c(2)(dV/dt)c = 15 V/ s, Tj = 125 = mA, tp = 1 1. Minimum IGT is guaranteed at 5% of IGT max2. For both polarities of OUT pin referenced to COM pin ACST4 CharacteristicsDS2762 - Rev 11page 2/16 Table 3. Static characteristicsSymbolTest conditionsValueUnitVTM (1)IOUT = A, tp = 500 sTj = 25 (1)Threshold voltageTj = 125 (1)Dynamic resistanceTj = 125 IDRMIRRMVOUT = VDRM/ VRRMTj = 25 ATj = 125 1. For both polarities of OUT pin referenced to COM pin Table 4.

4 Thermal characteristicsSymbolParameterValueUnitR th(j-c)Junction to case for full cycle sine wave (j-a)Junction to ambientTO-220 FPAB60 Junction to ambient, SCU= cm (1)DPAK70 1. SCU = copper surface under tab ACST4 CharacteristicsDS2762 - Rev 11page 3 (curves)Figure 1. Maximum power dissipation versus RMS on-state = 180 P(W)IT(RMS)(A)Figure 2. On-state RMS current versus case temperature(full cycle)IT(RMS)(A)0123450255075100125 =180 TO220 FPABDPAKTC( C)Figure 3. On-state RMS current versus ambienttemperature (free air convection, full cycle)IT(RMS)(A) =180 TO-220 FPABDPAK withcoppersurface = cm2Ta( C)Figure 4. Relative variation of thermal impedance junctionto case versus pulse durationK = [Zth/ Rth] + + + + +03 Zth(j-a)Zth(j-c)TO-220 FPABDPAKTp(s)Figure 5. Relative variation of gate trigger current andgate trigger voltage versus junction temperature (typicalvalues) Q1-Q2-Q3 GTIGT,VGT[Tj] / IGT,VGT[Tj= 25 C]Tj( C)Figure 6.

5 Relative variation of holding current andlatching current versus junction temperature (typicalvalues) ,IL[Tj] / IH,IL[Tj= 25 C]Tj( C)IHILACST4 Characteristics (curves)DS2762 - Rev 11page 4/16 Figure 7. Surge peak on-state current versus number ofcyclesITSM(A)051015202530351101001000 NonrepetitiveTjinitial=25 COne cyclet=20msRepetitiveTC=102 CNumber of cyclesFigure 8. Non repetitive surge peak on-state current for asinusoidal pulse (ms)pITSM(A),(A s)dl/dt limitation:100 A / sTjinitial = 25 CITSMF igure 9. On-state characteristics (maximum values)11010001234Tj= 125 CTj= 25 CITM(A)VTM(V)Tjmax:Vto= 110 m 5 Figure 10. Relative variation of critical rate of decrease ofmain current (dI/dt)c versus junction temperature012345672550751001258Tj( C)(dI/dt)c[Tj] / (dl/dt)c[Tj= 125 C]Figure 11. Relative variation of static dV/dt immunityversus junction temperature (gate open)0123456255075100125dV/dt [Tj] / dV/dt [Tj= 125 C]VD=VR= 536 VTj( C)Figure 12.

6 Relative variation of Leakage current versusjunction temperature255075100125 VDRM= VRRM= 800 VVDRM= VRRM= 600 VVDRM= VRRM= 200 VIDRM/IRRM[Tj;VDRM/VRRM] / IDRM/IRRM[Tj= 125 C;800V] +00Tj( C)Different blocking voltagesACST4 Characteristics (curves)DS2762 - Rev 11page 5/16 Figure 13. Relative variation of the clamping voltageversus junction temperature (minimum values) [Tj] /V[Tj= 25 C]CLCLTj( C)Figure 14. Thermal resistance junction to ambient versuscopper surface under tab (typical values)010203040506070809010005101520253 03540 SCu(cm )Rth(j-a)( C/W)DPAKE poxy printed circuit board, copper thickness: 35 mACST4 Characteristics (curves)DS2762 - Rev 11page 6/162 Application application descriptionsThe ACST4 device has been designed to control medium power load, such as AC motors in home to its thermal and turn off commutation performances, the ACST4 switch is able to drive an inductive loadup to 4 A with no turn off additional snubber.

7 It also provides high thermal performances in static and transientmodes such as the compressor inrush current or high torque operating conditions of an AC motor. Thanks to itslow gate triggering current level, the ACST4 can be driven directly by an MCU through a simple gate resistor asshown Figure 15 and Figure 15. Compressor control typical diagramsCompressorStartswitchRunswitchPT CRgACSTP ower supplyGateDriverACSTRgAC MainsCompressor with external electronic driveCompressorElectronicstarterElectron icthermostatACSTRgACSTP ower supplyAC MainsGateDriverlogical circuitry123 PTCC ompressor with integrated e-starterACST4 Application informationDS2762 - Rev 11page 7/16 Figure 16. Universal drum motor control typical diagramUniversal motorMotor directionsettingSpeed motorregulationRgAC MainsStatorMCUVcc12 VACSTR otorMCUACST4 Typical application descriptionsDS2762 - Rev 11page 8 line transient voltage ruggednessIn comparison with standard Triacs, which are not robust against surge voltage, the ACST4 is self-protectedagainst over-voltage, specified by the new parameter VCL.

8 The ACST4 switch can safely withstand AC linetransient voltages either by clamping the low energy spikes, such as inductive spikes at switch off, or by switchingto the on state (for less than 10 ms) to dissipate higher energy shocks through the load. This safety feature workseven with high turn-on current ramp test circuit of represents the ACST4 application, and is used to stress the ACST switch according to theIEC 61000-4-5 standard conditions. With the additional effect of the load which is limiting the current, the ACST switch withstands the voltage spikes up to 2 kV on top of the peak line voltage. The protection is based on anovervoltage crowbar technology. The ACST4 folds back safely to the on state as shown in . The ACST4 recoversits blocking voltage capability after the surge and the next zero current a non repetitive test can be done at least 10 times on each AC line voltage 17.

9 Overvoltage ruggedness test circuit for resistive and inductive loads for IEC 61000-4-5standardsAC MainsRFiltering unitRgModel of the loadRgeneSurge generatorACST42kV surgeLR = 23, L = 2 H,Vsurge = 2 kVRg = 220(ACST410-8), 68(ACST435-8) Figure 18. Typical voltage and current waveforms across the ACST4 during IEC 61000-4-5 standard testIV00 Vpeak= s voltage surge8/20 s current surgeIpeak= 90 AdI/dt = 130 A/ sACST4AC line transient voltage ruggednessDS2762 - Rev 11page 9/163 Package informationIn order to meet environmental requirements, ST offers these devices in different grades of ECOPACK packages,depending on their level of environmental compliance. ECOPACK specifications, grade definitions and productstatus are available at: ECOPACK is an ST package information Epoxy meets UL94, V0 Recommended torque: to N mFigure 19. TO-220 FPAB package outline ACST4 Package informationDS2762 - Rev 11page 10/16 Table 5.

10 TO-220 FPAB package mechanical package informationDS2762 - Rev 11page 11 package information Molding compouned resin is halogen free and meets UL94 flammability standard, level V0 Lead-free package leads platingFigure 20. DPAK package outlineAEb42LD4 Lee1bcA1Hc2LV2A2E1D1 ACST4 DPAK package informationDS2762 - Rev 11page 12/16 Table 6. DPAK package mechanical (1) (2)-8 +8 -8 +8 1. Dimensions in inches are given for reference only2. Degree Note:This package drawing may slightly differ from the physical package. However, all the specified dimensions 21. DPAK recommended footprint (dimensions are in mm) device must be positioned package informationDS2762 - Rev 11page 13/164 Ordering informationFigure 22. Ordering information schemeACS T 4 10 - 8 B TRAC switchTopologyOn-state RMS currentPackageT = Triac4 = 4 A8 = 800 VTR = Tape and reelBlank = TubeTriggering gate currentDelivery mode10 = 10 mA35 = 35 mAB = DPAKFP = TO-220 FPABR epetitive peak off-state voltage Table 7.