ACST1635-8FP

## **ACST1635-8FP** 

## Overvoltage protected AC switch 

##  **Datasheet production data** 

## **Description** 

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G<br>OUT<br>COM<br> TO-220FPAB<br>ACST1635-8FP<br>**----- End of picture text -----**<br>


The ACST1635-8FP belongs to the AC power switch range built with A.S.D.[®] technology. This high performance device is designed for home appliances or industrial systems and drives loads up to 16 A. 

This ACST1635-8FP switch embeds a Triac structure with a high voltage crowbar device to absorb the inductive turn-off energy and withstand line surges such as those described in the IEC 61000-4-5 (surge immunity test). 

## **Features** 

- Enables equipment to meet IEC 61000-4-5 surge with overvoltage crowbar technology 

- High noise immunity against static dV/dt and IEC 61000-4-4 burst 

- High junction temperature: Tj = 150 °C 

- Needs no external over-voltage protection 

- VCL gives headroom before clamping then crowbar action 

- Reduces component count 

## **Figure 1. Functional diagram** 

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


- ECOPACK[®] 2 compliant component 

- Complies with UL standards (File ref: E81734) 

- Provides UL certified insulation rated at 2000 V rms 

## **Applications** 

- AC static switching in appliances and industrial control systems 

- Drive of medium power AC loads such as: 

   - Coffee making appliances 

   - Universal drum motor of washing machine 

   - Compressor of fridge or air conditioner 

   - Heating and cooking appliances 

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

- Vacuum cleaners 

- Solid state relays 

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This is information on a product in full production. 

_www.st.com_ 

**Characteristics** 

**ACST1635-8FP** 

## **1 Characteristics** 

**Table 1. Absolute ratings (limiting values)** 

|**Symbol**|**Parameter**||**Value**|**Unit**|
|---|---|---|---|---|
|IT(RMS)|On-state rms current (full sine wave)|Tc= 84 °C|16|A|
|ITSM|Non repetitive surge peak on-state current<br>Tjinitial = 25 °C, (full cycle sine wave)|F = 50 Hz,<br>tp= 20 ms|140|A|
|||F = 60 Hz,<br>tp= 16.7 ms|147||
|I2t|I2t for fuse selection|tp= 10 ms|130|A2s|
|VDRM/VRRM|Repetitive peak off-stage voltage, gate open|Tj= 150 °C|800|V|
|dI/dt|Critical rate of rise on-state current IG= 2 x IGT,tr 100 ns|F = 120 Hz|100|A/µs|
|VPP<br>(1)|Non repetitive line peak pulse voltage|Tj= 25 °C|2|kV|
|PG(AV)|Average gate power dissipation|Tj= 150 °C|0.1|W|
|PGM|Peak gate power dissipation (tp= 20 µs)|Tj= 150 °C|10|W|
|IGM|Peak gate current (tp= 20 µs)|Tj= 150 °C|1|A|
|Tstg|Storage temperature range||-40 to +150|°C|
|Tj|Operating junction temperature range||-40 to +150|°C|
|TL|Lead temperature for soldering during 10 s||260|°C|
|Vins|Insulation rms voltage (60 seconds)||2000|V|



1. according to test described by standard IEC 61000-4-5 

**Table 2. Electrical characteristics** 

|**Symbol**|**Test conditions**|**Quadrant**|**Tj**|**Value**|**Value**|**Unit**|
|---|---|---|---|---|---|---|
|IGT|VOUT = 12 V, RL = 33|I - II - III|25 °C|Max.|35|mA|
|IGT|VOUT = 12 V, RL = 33|I - II - III|25 °C|Min.|1.75|mA|
|VGT|VOUT = 12 V, RL = 33|I - II - III|25 °C|Max.|1.0|V|
|VGD|VOUT = VDRM,RL = 3.3 k|I - II - III|150 °C|Min.|0.2|V|
|IH<br>(1)|IOUT = 500 mA||25 °C|Max.|30|mA|
|IL|IG = 1.2 x IGT|I - II - III|25 °C|Max.|40|mA|
|dV/dt(1)|VOUT = 67% VDRM, gate open||125 °C|Min.|1000|V/µs|
|dV/dt(1)|VOUT = 67% VDRM, gate open||150°C|Min.|300|V/µs|
|(dI/dt)c(1)|(dV/dt)c0.1 V/µs||125 °C|Min.|36|A/ms|
||||150 °C|Min.|12|A/ms|
|(dI/dt)c(1)|Without snubber||125 °C|Min.|12|A/ms|
||||150 °C|Min.|4|A/ms|
|VCL|ICL = 0.1 mA, tp= 1 ms||25 °C|Min.|850|V|



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

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**Characteristics** 

**Table 3. Static characteristics** 

|**Symbol**|**Test conditions**||**Value**|**Unit**|
|---|---|---|---|---|
|VTM<br>(1)|IOUT = 22.6 A, tp= 500 µs|Tj= 25 °C<br>Ma|x.<br>1.5|V|
|VT0<br>(1)|Threshold voltage|Tj= 150 °C<br>Ma|x.<br>0.9|V|
|Rd<br>(1)|Dynamic resistance|Tj= 150 °C<br>Ma|x.<br>30|m|
|IDRM<br>IRRM|VOUT= VDRM/ VRRM|Tj= 25 °C<br>Ma<br>Tj= 125 °C<br>Tj= 150 °C|x.<br>1<br>500<br>2|µA|
|||||µA|
|||||mA|



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

**Table 4. Thermal characteristics** 

||**Table 4. Thermal characteristics**|||
|---|---|---|---|
|**Symbol**|**Parameter**|**Value**|**Unit**|
|Rth(j-c)|Junction to case (AC)|3.2|°C/W|
|Rth(j-a)|Junction to ambient|60|°C/W|



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Figure 2. Maximum power dissipation versus  Figure 3. On-state rms current versus case<br>rms on-state current temperature<br>22 P(W) 18 IT(RMS)(A)<br>20 180°<br>16<br>18<br>14<br>16<br>14 12<br>12 10<br>10 8<br>8<br>6<br>6<br>4<br>4<br>2 2<br>0 IT(RMS)(A) 0 TC(°C)<br>0 2 4 6 8 10 12 14 16 0 25 50 75 100 125 150<br>Figure 4. On-state rms current versus ambient  Figure 5. Relative variation of thermal<br>temperature (free air convection) impedance versus pulse duration<br>3.0 IT(RMS)(A) 1.0E+00 K = [Zth / Rth]<br>Zth(j-c)<br>2.5<br>2.0 Z th(j-a)<br>1.5 1.0E-01<br>1.0<br>0.5<br>0.0 Ta(°C) 1.0E-02 tp(s)<br>0 25 50 75 100 125 150 1.0E-03 1.0E-02 1.0E-01 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04<br>**----- End of picture text -----**<br>


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**Characteristics** 

**ACST1635-8FP** 

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

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ITM(A)<br>1000<br>T max:j<br>Vto = 0.9 V<br>R d = 30 m Ω<br>100<br>10<br>T j = 150 °C<br>T j = 25 °C VTM(V)<br>1<br>0 1 2 3 4 5<br>**----- End of picture text -----**<br>


**Figure 7. Surge peak on-state current versus number of cycles** 

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150 ITSM(A)<br>140<br>130<br>120 t = 20 ms<br>110 One cycle<br>100 Non repetitive<br>90 T j initial = 25 °C<br>80<br>70<br>60<br>50<br>Repetitive<br>4030 Tc = 84 °C<br>20<br>10 Number of cycles<br>0<br>1 10 100 1000<br>**----- End of picture text -----**<br>


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Figure 8. Non repetitive surge peak on-state  Figure 9. Relative variation of gate trigger<br>current for a sinusoidal current and gate trigger voltage versus junction<br>temperature<br>10000 ITSM( A), I²t (A²s) 3.0 IGT,VGT[T ]/Ij GT,VGT[Tj = 25 °C]<br>typical values<br>2.5 IGT Q3<br>I GT Q1-Q2<br>1000 T j initial = 25 °C 2.0<br>I TS M 1.5<br>dl /dt limitation: 100 A / µs<br>I²t 1.0 V GT Q1-Q2-Q3<br>100<br>0.5<br>10 pulse with width tcorresponding v p <10 msalue of I²t, and tp(ms ) 0.0-50 -30 -10 10 30T (°C)j 50 70 90 110 130 150<br>0.01 0.10 1.00 10.00<br>**----- End of picture text -----**<br>


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Figure 10. Relative variation of holding current  Figure 11. Relative variation of critical rate of<br>and latching current versus junction  decrease of main current (dI/dt)c versus<br>temperature reapplied (dV/dt)c<br>IH, IL[T ] / Ij H, IL[Tj = 25 °C] (dI/dt)c[(dV/dt)c]/Specified(dI/dt)c<br>2.0 3.5<br>typical values Tj=125 °C and 150 °C<br>3.0 typical values<br>1.5 2.5<br>2.0<br>1.0<br>1.5<br>I L<br>1.0<br>0.5<br>IH 0.5<br>0.0 T (°C)j 0.0 (dV/dt)c (V/µs)<br>-50 -30 -10 10 30 50 70 90 110 130 150 0.1 1.0 10.0 100.0<br>**----- End of picture text -----**<br>


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**Characteristics** 

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Figure 12. Relative variation of critical rate of  Figure 13. Relative variation of static dV/dt<br>decrease of main current versus junction  immunity versus junction temperature (typical<br>temperature values)<br>20 (dl / dt)c [T ] /j (dl / dt)c [Tj = 150 °C] 7 dV / dt [T ] /j dV / dt [Tj = 150 °C]<br>18 typical values 6 (dV/dt) > 5 KV/µs @ 150 °Cexceeding VD = VR = 536 V<br>16 measurements capabilities<br>14 5<br>12<br>4<br>10<br>8 3<br>6 2<br>4<br>1<br>2<br>T (°C)j T (°C)j<br>0 0<br>25 50 75 100 125 150 25 50 75 100 125 150<br>**----- End of picture text -----**<br>


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Figure 14. Relative variation of the maximal  Figure 15. Relative variation of Leakage current<br>clamping voltage versus junction temperature  versus junction temperature<br>(minimum value)<br>1.15 V CL[ T /Vj C L[ Tj = 25 °C ] 1.0E+00 Relative leakage current A/B*<br>V DRM = V RRM = 800 V<br>1.10 1.0E-01 VDRM = VRRM = 600 V<br>1.05 1.0E-02<br>VDRM = VRRM = 400 V<br>1.00<br>1.0E-03<br>0.95<br>1.0E-04<br>0.90<br>1.0E-05 T (°C)j<br>T (°C )j 25 50 75 100 125 150<br>0.85<br>-50 -25 0 25 50 75 100 125 150 *A = Leakage current (IDRM = IRRM) at indicated TJ and VDRM = VRRM<br>*B = Leakage current (IDRM = IRRM) at Tj = 150 °C, VDRM = VRRM = 800 V<br>**----- End of picture text -----**<br>


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**ACST1635-8FP** 

**Application information** 

## **2 Application information** 

## **2.1 Typical application descriptions** 

The ACST1635-8FP device can be used to control medium power load, such as AC motors in home appliances. Thanks to its thermal and turn off commutation performances, the ACST1635-8FP switch is able to drive an inductive load up to 16 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. 

**Figure 16. AC induction motor control - typical diagram** 

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AC Motor<br>AC<br>induction<br>motor<br>AC Mains<br>C L<br>Phase shift capacitor +<br>protective air inductance<br>ACST ACST<br>Rg Rg Selection of the<br>rotor direction<br>Vcc<br>MCU<br>**----- End of picture text -----**<br>


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**Application information** 

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

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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>


The ACST1635-8FP device is also very effective in controlling resistive loads. 

**Figure 18. Resistive load control - typical diagram** 

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Lamp or<br>resistance<br>OUT<br>Variable<br>resistor<br>AC mains<br>Diac G<br>Capacitor<br>COM<br>**----- End of picture text -----**<br>


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**Application information** 

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

In comparison with standard Triacs, which needs additional protection components against surge voltage, the ACST1635-8FP is self-protected against overvoltage, specified by the new parameter VCL. The ACST1635-8FP 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 19_ represents the ACST1635-8FP 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 ACST1635-8FP folds back safely to the on state as shown in _Figure 20_ . The ACST1635-8FP 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. 

**Figure 19. Overvoltage ruggedness test circuit for resistive and inductive loads for IEC 61000-4-5 standards** 

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R = 6 Ω, L = 2 µH, Vsur ge = 2 kV<br>R = 62 Ω<br>g<br>Surge generator<br>2kV surge<br>Rgene<br>Model of the load<br>Filtering unit<br>R L<br>ACST<br>AC mains<br>Rg<br>**----- End of picture text -----**<br>


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**Application information** 

**Figure 20. Typical voltage and current waveforms across the ACST1635-8FP during IEC 61000-4-5 standard test** 

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V peak = V CL<br>1.2/50 µs voltage surge<br>V<br>0<br>I peak = 290 A<br>8/20 µs current surge<br>I<br>0<br>dI/dt = 150 A/µs<br>**----- End of picture text -----**<br>


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**ACST1635-8FP** 

**Package information** 

## **3 Package information** 

- Epoxy meets UL94, V0 

- Recommended torque: 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. 

## **3.1 TO-220FPAB package information** 

## **Figure 21. TO-220FPAB package outline** 

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A<br>H B<br>Dia<br>L6<br>L2 L7<br>L3<br>L5<br>D<br>F1<br>L4<br>F2<br>F E<br>G1<br>G<br>**----- End of picture text -----**<br>


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**Package information** 

**Table 5. TO-220FPAB package mechanical data** 

||**Table 5. TO-220FPABpackage mechanical data**|**Table 5. TO-220FPABpackage mechanical data**|**Table 5. TO-220FPABpackage mechanical data**|**Table 5. TO-220FPABpackage mechanical data**|**Table 5. TO-220FPABpackage mechanical data**|**Table 5. TO-220FPABpackage mechanical data**|
|---|---|---|---|---|---|---|
|**Ref.**|**Dimensions**||||||
||**Millimeters**|||**Inches(1)**|||
||**Typ.**|**Min.**|**Max.**|**Typ.**|**Min.**|**Max.**|
|A||4.4|4.6||0.173|0.181|
|B||2.5|2.7||0.098|0.106|
|D||2.5|2.75||0.098|0.108|
|E||0.45|0.70||0.018|0.027|
|F||0.75|1||0.030|0.039|
|F1||1.15|1.70||0.045|0.067|
|F2||1.15|1.70||0.045|0.067|
|G||4.95|5.20||0.195|0.205|
|G1||2.4|2.7||0.094|0.106|
|H||10|10.4||0.393|0.409|
|L2|16|||0.63|||
|L3||28.6|30.6||1.126|1.205|
|L4||9.8|10.6||0.386|0.417|
|L5||2.9|3.6||0.114|0.142|
|L6||15.9|16.4||0.626|0.646|
|L7||9.00|9.30||0.354|0.366|
|Dia.||3.00|3.20||0.118|0.126|



1. Values in inches are converted from mm and rounded to 4 decimal digits. 

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**Ordering information** 

**ACST1635-8FP** 

## **4 Ordering information** 

## **Figure 22. Ordering information scheme** 

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ACST  16  35 - 8  FP<br>AC switch Triac topology<br>On-state rms current<br>16 = 16 A<br>Triggering gate current<br>35 = 35 mA<br>Voltage<br>8 = 800 V<br>Package<br>FP = TO-220FPAB<br>**----- End of picture text -----**<br>


**Table 6. Ordering information** 

|**Order code**|**Marking**|**Package**|**Weight**|**Base qty.**|**Packing mode**|
|---|---|---|---|---|---|
|ACST1635-8FP|ACST1635-8FP|TO-220FPAB|2.0 g|50|Tube|



## **5 Revision history** 

**Table 7. Document revision history** 

|**Date**|**Revision**|**Changes**|
|---|---|---|
|12-Sep-2012|1|First issue.|
|26-Mar-2015|2|Update of cover page and_Table 1_.<br>Format updated to current standard.|



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© 2015 STMicroelectronics – All rights reserved 

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