ACST1210-7T

Overvoltage protected AC switch 

**==> picture [61 x 39] intentionally omitted <==**

## **ACST12** 

## **Features** 

- Triac with overvoltage crowbar technology 

- Low IGT (<10 mA) or high immunity (IGT<35 mA) version 

- High noise immunity: static dV/dt > 2000 V/µs 

## **Benefits** 

- Enables equipment to meet IEC 61000-4-5 

- High off-state reliability with planar technology 

**==> picture [191 x 116] intentionally omitted <==**

**----- Start of picture text -----**<br>
OUT<br>OUT<br>G<br>G<br>OUT<br>COM COM<br>TO-220AB D [2] PAK<br>ACST1210-7T ACST1210-7G<br>ACST1235-7T ACST1235-7G<br>**----- End of picture text -----**<br>


- Need no external over voltage protection 

- Reduces the power passive component count 

- High immunity against fast transients described in IEC 61000-4-4 standards 

## **Applications** 

- AC mains static switching in appliance and industrial control systems 

- Drive of medium power AC loads such as: 

   - Universal motor of washing machine drum 

   - Compressor for fridge or air conditioner 

## **Description** 

The ACST12 series belongs to the ACS™/ACST power switch family built with A.S.D.[®] (application specific discrete) technology. This high performance device is suited to home appliances or industrial systems and drives loads up to 12 A. 

This ACST12 switch embeds a Triac structure and a high voltage clamping device able to absorb the inductive turn-off energy and withstand line transients such as those described in the IEC 61000-4-5 standard. The ACST1210-7 needs a low gate current to be activated (IGT < 10 mA) and still provides a high electrical noise immunity complying with the IEC 61000-4-4 standard. The ACST1235-7 offers an extremely high static dV/dt immunity of 2 kV/µs minimum. 

## **Figure 1. Functional diagram** 

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OUT<br>G<br>COM<br>**----- End of picture text -----**<br>


**Table 1. Device summary** 

|**Symbol**|**Value**|**Unit**|
|---|---|---|
|IT(RMS)|12|A|
|VDRM/VRRM|700|V|
|IGT|10 or 35|mA|



## **TM** : ACS is a trademark of STMicroelectronics 

®: A.S.D. is a registered trademark of STMicroelectronics 

1/13 

December 2010 

Doc ID 15238 Rev 4 

_www.st.com_ 

**Characteristics** 

**ACST12** 

## **1 Characteristics** 

## **Table 2. Absolute ratings (limiting values)** 

|**Table 2.**|**Absolute ratings (limiting values)**|**Absolute ratings (limiting values)**|**Absolute ratings (limiting values)**|||
|---|---|---|---|---|---|
|**Symbol**|**Parameter**|||**Value**|**Unit**|
|IT(RMS)|On-state rms current full sine wave|TO-220AB<br>D2PAK|Tc= 104 °C|12|A|
|||D2PAK<br>with 1cm2of Cu|Tamb= 47<br>°C|2||
|ITSM|Non repetitive surge peak on-state current<br>Tjinitial = 25 °C,( full cycle sine wave)|F = 60 Hz|tp= 16.7 ms|126|A|
|||F = 50 Hz|tp= 20.0 ms|120|A|
|I2t|I2t for fuse selection||tp= 10 ms|95|A2s|
|dI/dt|Critical rate of rise on-state current<br>IG= 2 x IGT,(tr ≤100 ns)|F = 120 Hz|Tj= 125 °C|100|A/µs|
|VPP|Non repetitive line peak pulse voltage(1)||Tj= 125 °C|2|kV|
|PG(AV)|Average gate power dissipation||Tj= 125 °C|0.1|W|
|PGM|Peak gate power dissipation (tp= 20 µs)||Tj= 125 °C|10|W|
|IGM|Peak gate current (tp= 20 µs)||Tj= 125 °C|1.6|A|
|Tstg|Storage temperature range|||- 40 to + 150|°C|
|Tj|Operating junction temperature range|||- 40 to + 125|°C|
|Tl|maximum lead soldering temperature during|10 s (at 3 mm from plastic case)||260|°C|



1. According to test described in IEC 61000-4-5 standard and _Figure 19_ 

**Table 3. Electrical characteristics** 

|**Symbol**|**Test conditions**|**Quadrant**|**Tj**||**Value**|**Value**|**Unit**|
|---|---|---|---|---|---|---|---|
||||||**ACST1210-7**|**ACST1235-7**|**Unit**|
|IGT<br>(1)|VOUT = 12 V, RL = 33Ω|I - II - III|25 °C|MAX.|10|35|mA|
|VGT|VOUT = 12 V, RL = 33Ω|I - II - III|25 °C|MAX.|1.0||V|
|VGD|VOUT = VDRM,RL = 3.3Ω|I - II - III|125 °C|MIN.|0.2||V|
|IH<br>(2)|IOUT = 500 mA||25 °C|MAX.|30|50|mA|
|IL|IG = 1.2 x IGT|I - II - III|25 °C|MAX.|50|70|mA|
|dV/dt(2)|VOUT = 67% VDRM, gate open||125 °C|MIN.|200|2000|V/µs|
|(dI/dt)c(2)|(dV/dt)c = 15 V/µs||125 °C|MIN.|5.3||A/ms|
||Without snubber|||MIN.||14||
|VCL|ICL = 0.1 mA, tp= 1 ms||25 °C|MIN.|850||V|



1. Minimum IGT is guaranteed at 5% of IGT max 

2. For both polarities of OUT pin referenced to COM pin 

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Doc ID 15238 Rev 4 

**ACST12** 

**Characteristics** 

## **Table 4. Static characteristics** 

|**Table 4.**|**Static characteristics**|||||
|---|---|---|---|---|---|
|**Symbol**|**Test conditions**|**V**||**alue**|**Unit**|
|VTM<br>(1)|IOUT = 17 A, tp= 500 µs|Tj= 25 °C|MAX.|1.5|V|
|VT0<br>(1)|Threshold voltage|Tj= 125 °C|MAX.|0.9|V|
|Rd<br>(1)|Dynamic resistance|Tj= 125 °C|MAX.|30|mΩ|
|IDRM<br>IRRM|VOUT= VDRM/ VRRM|Tj= 25 °C|MAX.|20|µA|
|||Tj= 125 °C||1.5|mA|



1. For both polarities of OUT pin referenced to COM pin 

## **Table 5. Thermal characteristics** 

|**Table 5.**|**Thermal characteristics**||||
|---|---|---|---|---|
|**Symbol**|**Parameter**|**V**|**alue**|**Unit**|
|Rth(j-c)|Junction to case (AC)|TO-220AB<br>D2PAK|1.5|°C/W|
|||||°C/W|
|Rth(j-a)|Junction to ambient|TO-220AB|60|°C/W|
|||D2PAK with 1 cm2of Cu|45|°C/W|



**Figure 2. Maximum power dissipation versus Figure 3. On-state rms current versus case on-state rms current (full cycle) temperature (full cycle)** 

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15 P(W) 13 IT(RMS)(A)<br>14 α=180 ° 12<br>13<br>11<br>12<br>10<br>11<br>10 9<br>9 8<br>8 7<br>7 6<br>6 5<br>5 4<br>4 3<br>3<br>2<br>2 IT(RMS)(A) 1 TC(°C)<br>1<br>0 0<br>0 1 2 3 4 5 6 7 8 9 10 11 12 0 25 50 75 100 125<br>**----- End of picture text -----**<br>


**Figure 4. On-state rms current versus ambient temperature (free air convection full cycle)** 

**Figure 5. Relative variation of thermal impedance versus pulse duration** 

**==> picture [462 x 146] intentionally omitted <==**

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3.0 IT(RMS)(A) 1.0E+00 K=[Zth/Rth]<br>D [2] PAK Z th(j-c)<br>With 1cm [2] of cu Zth(j-a)<br>2.5<br>2.0<br>TO-220AB<br>1.5 1.0E-01<br>1.0<br>0.5<br>Tamb(°C) tp(s)<br>0.0 1.0E-02<br>0 25 50 75 100 125 1.0E-03 1.0E-02 1.0E-01 1.0E+00 1.0E+01 1.0E+02 1.0E+03<br>**----- End of picture text -----**<br>


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**Characteristics** 

**ACST12** 

## **Figure 6. On-state characteristics (maximum values)** 

**Figure 7. Non repetitive surge peak on-state current versus number of cycles (Tj initial = 25 °C)** 

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ITM (A)<br>1000 130 ITSM(A)<br>120<br>110<br>100 t=20ms<br>100 90 Non repetitive One cycle<br>80 Tj initial=25 °C<br>70<br>60<br>50<br>10 40<br>30<br>Tj max : 20 Repetitive<br>Tj=125 °C Tj=25 °C VTM (V) VRtod = 30 m = 0.90 V Ω 100 TC=104 °C Number of cycles<br>1<br>1 10 100 1000<br>0 1 2 3 4 5<br>**----- End of picture text -----**<br>


## **Figure 8. Non repetitive surge peak on-state Figure 9. Relative variation of gate triggering current for a sinusoidal pulse and current and gate voltage versus corresponding value of I[2] t junction temperature (typical value)** 

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10000 ITSM(A), I t (A s)2 2 3.0 IGT, VGT[T] / Ij GT, VGT[T = 25 °C]j<br>dI/dt limitation: 100 A/µs Tj initial=25 °C<br>2.5 IGT Q3<br>1000 ITSM<br>2.0 IGT Q1-Q2<br>100 1.5<br>I²t<br>1.0 VGT Q1-Q2-Q3<br>10<br>0.5<br>tP(ms) Tj(°C)<br>1 0.0<br>0.01 0.10 1.00 10.00 -50 -25 0 25 50 75 100 125<br>Figure 10. Relative variation of holding  Figure 11. Relative variation of critical rate of<br>current (IH) and latching current (IL)  decrease of main current (di/dt)c<br>versus junction temperature versus (dV/dt)c<br>2.5 IH,I [T]/IL j      H, I [TL j = 25 °C] 1.6 (di/dt)c[(dV/dt)c] / Specified(di/dt)c<br>1.4<br>2.0<br>1.2<br>ACST12-7Cxx<br>1.0<br>1.5<br>Typical values<br>0.8<br>1.0 0.6 ACST12 - 7Sxx<br>IL 0.4<br>0.5<br>IH 0.2<br>(dV/dt)c (V/µs)<br>0.0 Tj(°C) 0.0<br>0.1 1 10 100<br>-50 -25 0 25 50 75 100 125<br>**----- End of picture text -----**<br>


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**ACST12** 

**Characteristics** 

**==> picture [462 x 182] intentionally omitted <==**

**----- Start of picture text -----**<br>
Figure 12. Relative variation of critical rate of  Figure 13. Relative variation of static dV/dt<br>decrease of main current versus  immunity versus junction<br>junction temperature temperature<br>(dI/dt)c[Tj] / (dI/dt)c[Tj=125°C] dV/dt[Tj] / dV/dt[Tj=125°C]<br>11 12<br>10 11 VD=VR=469 V<br>9 10<br>9<br>8<br>8<br>7<br>7<br>6<br>6<br>5<br>5<br>4<br>4<br>3 3<br>2 2<br>1 1<br>Tj(°C) Tj(°C)<br>0 0<br>25 50 75 100 125 25 50 75 100 125<br>**----- End of picture text -----**<br>


## **Figure 14. Relative variation of maximum clamping voltage, VCL versus junction temperature** 

## **Figure 15. Variation of thermal resistance junction to ambient versus copper surface under tab** 

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1.15 VCL[T /VJ CL[T  = 25 °C]J 80 Rth(j-a)(°C/W)<br>1.10 70 FR4, copper thickness = 35 µmEpoxy printed circuit board D²PAK<br>60<br>1.05<br>50<br>1.00 40<br>Minimum values 30<br>0.95<br>20<br>0.90<br>T (°C)J 10 SCU(cm²)<br>0.85 0<br>-50 -25 0 25 50 75 100 125 0 5 10 15 20<br>**----- End of picture text -----**<br>


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Doc ID 15238 Rev 4 

**ACST12** 

**Application information** 

## **2 Application information** 

## **2.1 Typical application description** 

The ACST12 device has been designed to control medium power load, such as AC motors in home appliances. Thanks to its thermal and turn off commutation performances, the ACST12 switch is able to drive an inductive load up to 12 A with no turn off additional snubber. It also provides high thermal performances in static and transient modes such as the compressor inrush current or high torque operating conditions of an AC motor. Thanks to its low gate triggering current level, the ACST1210-7 can be driven directly by a MCU through a simple gate resistor as shown in _Figure 16_ . 

## **Figure 16. Compressor control – typical diagrams** 

**==> picture [390 x 257] intentionally omitted <==**

**----- Start of picture text -----**<br>
Compressor Compressor<br>AC Mains<br>PTC AC Mains<br>Electronic PTC<br>ACST<br>starter<br>1 logical circuitry ACST<br>Start<br>switch<br>ACST<br>Run<br>switch<br>Electronic<br>ACST thermostat<br>Rg<br>Rg Rg<br>Gate Gate<br>Power supply Driver Power supply Driver<br>Compressor with integrated e-starter Compressor with external electronic drive<br>2<br>3<br>**----- End of picture text -----**<br>


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**ACST12** 

**Application information** 

## **Figure 17. Universal drum motor control – typical diagram** 

**==> picture [246 x 273] intentionally omitted <==**

**----- Start of picture text -----**<br>
Universal motor<br>Stator Rotor<br>12V<br>AC Mains<br>Motor direction<br>setting<br>MCU<br>Speed motor ACST Rg<br>regulation<br>Vcc<br>MCU<br>**----- End of picture text -----**<br>


## **2.2 AC line transient voltage ruggedness** 

In comparison with standard Triacs, which are not robust against surge voltage, the ACST12 is self-protected against over-voltage, specified by the new parameter VCL. The ACST12 switch can safely withstand AC line transient voltages either by clamping the low energy spikes, such as the inductive spikes at switch off, or by switching to the on state (for less than 10 ms) to dissipate higher energy shocks through the load. This safety feature works even with high turn-on current ramp-up. 

The test circuit of _Figure 18_ represents the ACST12 application, and is used to stress the ACST switch according to the IEC 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 an overvoltage crowbar technology. The ACST12 folds back safely to the on state as shown in _Figure 19_ . The ACST12 recovers its blocking voltage capability after the surge and the next zero crossing current. Such a non repetitive test can be done at least 10 times on each AC line voltage polarity. 

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**ACST12** 

**Application information** 

**Figure 18. Overvoltage ruggedness test circuit for resistive and inductive loads for IEC 61000-4-5 standards** 

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**----- Start of picture text -----**<br>
R = 20 Ω , L = 2 µH, Vsurge = 2 kV<br>Surge generator<br>2kV surge<br>Rgene<br>Model of the load<br>Filtering unit<br>R L<br>ACST12<br>AC Mains<br>Rg<br>**----- End of picture text -----**<br>


**Figure 19. Typical voltage and current waveforms across the ACST12 during IEC 61000-4-5 standard test** 

**==> picture [183 x 139] intentionally omitted <==**

**----- Start of picture text -----**<br>
V peak= V CL<br>1.2/50 µs voltage surge<br>V<br>0<br>8/20 µs current surge<br>I<br>0<br>**----- End of picture text -----**<br>


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**ACST12** 

**Ordering information scheme** 

## **3 Ordering information scheme** 

**==> picture [198 x 11] intentionally omitted <==**

**----- Start of picture text -----**<br>
Figure 20. Ordering information scheme<br>**----- End of picture text -----**<br>


**==> picture [310 x 269] intentionally omitted <==**

**----- Start of picture text -----**<br>
ACS  T  12  10 -  7   G TR<br>AC switch<br>Topology<br>T = Triac<br>On-state rms current<br>12 = 12 A<br>Sensitivity<br>10 = 10 mA<br>35 = 35 mA<br>Voltage<br>7 = 700 V<br>Package<br>G = D²PAK<br>T = TO-220AB<br>Delivery mode<br>TR = Tape and reel (DPAK)<br>Blank = Tube (TO-220FPAB, DPAK)<br>**----- End of picture text -----**<br>


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**ACST12** 

**Package information** 

## **4 Package information** 

- Epoxy meets UL94, V0 

- Recommended torque (TO-220AB): 0.4 to 0.6 N·m 

In 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 product status are available at: www.st.com. ECOPACK[®] is an ST trademark. 

## **Table 6. TO-220AB dimensions** 

|**L2**|||||**A**<br>**C**<br>**D**<br>**L7**<br>**ia**<br>**L5**<br>**L6**<br>**L9**<br>**L4**<br>**2**<br>**G**<br>**E**<br>**M**|**A**<br>**C**<br>**D**<br>**L7**<br>**ia**<br>**L5**<br>**L6**<br>**L9**<br>**L4**<br>**2**<br>**G**<br>**E**<br>**M**|**Ref.**|**Dimensions**|**Dimensions**|**Dimensions**|**Dimensions**|
|---|---|---|---|---|---|---|---|---|---|---|---|
|||||||||**Millimeters**||**Inches**||
|||||||||**Min.**|**Max.**|**Min.**|**Max.**|
||||||||A|4.40|4.60|0.173|0.181|
||||||||C|1.23|1.32|0.048|0.051|
|||||**H**||||||||
||||||||D|2.40|2.72|0.094|0.107|
|||||**D**|**ia**|||||||
||||||||E|0.49|0.70|0.019|0.027|
|||||||**L5**|F<br>|0.61|0.88|0.024|0.034|
|||**F2**<br>**F1**||||||||||
||||||||F1|1.14|1.70|0.044|0.066|
|||||||||||||
||||||||F2|1.14|1.70|0.044|0.066|
||||||||G|4.95|5.15|0.194|0.202|
||||||||G1|2.40|2.70|0.094|0.106|
|||||**F**|||H2|10|10.40|0.393|0.409|
||||||||L2|16.4 typ.||0.645 typ.||
|||||**G1**||||||||
||||||||L4|13|14|0.511|0.551|
||||||||L5|2.65|2.95|0.104|0.116|
||||||||L6|15.25|15.75|0.600|0.620|
|||||||||||||
||||||||L7|6.20|6.60|0.244|0.259|
||||||||L9|3.50|3.93|0.137|0.154|
||||||||M|2.6 typ.||0.102 typ.||
||||||||Diam.|3.75|3.85|0.147|0.151|



10/13 

Doc ID 15238 Rev 4 

**ACST12** 

**Package information** 

**Table 7. D[2] PAK dimensions** 

|**L**||||||**A**<br>**D**<br>**R**<br>**V2**|**Ref.**|**Dimensions**|**Dimensions**|**Dimensions**|**Dimensions**|**Dimensions**|**Dimensions**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|||||||||**Millimeters**|||**Inches**|||
|||||||||**Min.**|**Typ.**|**Max.**|**Min.**|**Typ.**|**Max.**|
||**L2**||||**C2**||A|4.30||4.60|0.169||0.181|
|||||||||||||||
||||||||A1|2.49||2.69|0.098||0.106|
||||**E**|||||||||||
||||||||A2|0.03||0.23|0.001||0.009|
||**L3**||||||B|0.70||0.93|0.027||0.037|
||||||||B2<br>|1.25<br>|1.40||0.048 <br>|0.055||
||||||||C|0.45||0.60|0.017||0.024|
||||||**A1**||C2|1.21||1.36|0.047||0.054|
||||**G**|**B**<br>**B2**|**2mm min.**<br>**FLAT ZONE**<br>**A2**<br>**C**|||||||||
|||||||||||||||
||||||||D|8.95||9.35|0.352||0.368|
||||||||E|10.00||10.28|0.393||0.405|
||||||||G|4.88||5.28|0.192||0.208|
||||||||L|15.00||15.85|0.590||0.624|
||||||||L2|1.27||1.40|0.050||0.055|
||||||||L3|1.40||1.75|0.055||0.069|
||||||||R|0.40|||0.016|||
||||||||V2|0°||8°|0°||8°|



## **Figure 21. Footprint (dimensions in mm)** 

**==> picture [163 x 94] intentionally omitted <==**

**----- Start of picture text -----**<br>
16.90<br>10.30 5.08<br>1.30<br>3.70<br>8.90<br>**----- End of picture text -----**<br>


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Doc ID 15238 Rev 4 

**Ordering information** 

**ACST12** 

## **5 Ordering information** 

## **Table 8. Ordering information** 

|**Order code**|**Marking**|**Package**|**Weight**|**Base qty**|**Packing mode**|
|---|---|---|---|---|---|
|ACST1210-7T|ACST12107|TO-220AB|2.3 g|50|Tube|
|ACST1210-7G||D2PAK|1.5 g|50|Tube|
|ACST1210-7GTR||D2PAK|1.5 g|1000|Tape and reel|
|ACST1235-7T|ACST12357|TO-220AB|2.3 g|50|Tube|
|ACST1235-7G||D2PAK|1.5 g|50|Tube|
|ACST1235-7GTR||D2PAK|1.5 g|1000|Tape and reel|



## **6 Revision history** 

## **Table 9. Document revision history** 

|**Date**|**Revision**|**Changes**|
|---|---|---|
|02-Dec-2008|1|First issue.|
|13-Apr-2010|2|Updated ECOPACK statement. Reformatted for consistency with<br>other datasheets in this product class.|
|01-Jul-2010|3|Updated_Figure 20._|
|07-Dec-2010|4|Updated_Table 3._|



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**ACST12** 

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