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this is information on a product in full production. april 2014 docid026033 rev 1 1/13 ACST1235-8FP overvoltage protected ac switch datasheet ? production data features ? 12 a medium current ac switch ? triac with self overvoltage protection ? high static immunity and dynamic commutation ? 800 v v drm / v rrm ? high junction temperature: t j = 150 c max ? complies with ul standards (file ref: e81734) ? to-220fpab-insulated package 1500v rms ? ecopack ? 2 and rohs compliant component applications motor control for home appliances: ? washing machine universal drum motors ? compressor of fridge or air conditioner description the ACST1235-8FP 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 ACST1235-8FP 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. it offers an extremely high static dv/dt immunity of 2 kv/ s minimum at 150 c junction temperature. ACST1235-8FP enables applications to be compliant with iec 61000-4-4 and iec 61000-4-5. figure 1. functional diagram to-220fpab (ACST1235-8FP) g out com table 1. device summary symbol value v drm /v rrm i t(rms) 12 a i gt 35 ma v drm /v rrm 800 v g com out www.st.com
characteristics ACST1235-8FP 2/13 docid026033 rev 1 1 characteristics table 2. absolute ratings (limiting values) symbol parameter test conditions value unit i t(rms) on-state rms current (full sine wave) t c = 97 c 12 a i tsm non repetitive surge peak on-state current (t j initial = 25 c) t p = 16.7 ms 105 a t p = 20 ms 100 i 2 ti 2 t value for fusing (full cycle sine wave) t p = 10 ms 66 a2s di/dt critical rate of rise on-state current i g = 2 x i gt, t r 100 ns f = 60hz t j = 150 c 100 a/s v drm /v rrm repetitive peak off-state voltage t j = 150 c 800 v v pp (1) non repetitive line peak pulse voltage t j = 25 c 2 kv (di/dt) bo (1) non repetitive critical current rate of rise at breakover t j = 25 c 150 a/s i gm peak gate current t p = 20 s t j = 150 c 1 a p gm peak gate power t p = 20 s t j = 150 c 10 w p g(av) average gate power dissipation t j = 150 c 0.1 w t stg storage junction temperature range -40 to +150 c t j operating junction temperature range -40 to +150 c t l maximum lead temperature for soldering during 10 s 260 c v ins(rms) insulation rms voltage (60 seconds) 1.500 v 1. according to test described by standard iec 61000-4-5 (see figure 19 ) table 3. electrical characteristics symbol test conditions quadrant t j value unit i gt v d = 12 v, r l = 33 i - ii - iii 25 c max. 35 ma min. 1.75 v gt v d = 12 v, r l = 33 i - ii - iii 25 c max. 1.0 v v gd v d = v drm , r l = 3.3 k i - ii - iii 150 c min. 0.2 v i h (1) i t = 500 ma, gate open 25 c max. 30 ma i l i g = 1.2 x i gt i - ii - iii 25 c max. 40 ma dv/dt (1) v d = 67% v drm /v rrm , gate open 125 c min. 4000 v/s 150 c min. 2000 (di/dt)c (1) without snubber 125 c min. 12 a/ms (di/dt)c = 15 v/s 150 c min. 6 v cl i cl = 0.1 ma, t p = 1 ms min. 850 v 1. for both polarities of out pin referenced to com pin
docid026033 rev 1 3/13 ACST1235-8FP characteristics 13 table 4. static characteristics symbol test conditions value unit v tm (1) i tm = 17 a, t p = 380 s t j = 25 c max. 1.5 v v to (1) threshold voltage t j = 150 c max. 0.9 v r d (1) dynamic resistance t j = 150 c max. 38 m i drm i rrm v out = v drm / v rrm t j = 25 c max. 1a t j = 125 c 500 a t j = 150 c 1.2 ma 1. for both polarities of out pin referenced to com pin table 5. thermal characteristics symbol parameter value unit r th(j-c) junction to case (ac) 3.5 c/w r th(j-a) junction to ambient (ac) 60 c/w figure 2. maximum power dissipation versus rms on-state current (full cycle) figure 3. on-state rms current versus case temperature (full cycle) p(w) 0 2 4 6 8 10 12 14 16 024681012 = 180 180 i (a) t(rms) i t(rms) (a) 0 2 4 6 8 10 12 14 0 25 50 75 100 125 150 = 180 t (c) c figure 4. on-state rms current versus ambient temperature (free air convection) figure 5. relative variation of thermal impedance versus pulse duration i t(rms) (a) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 0 25 50 75 100 125 150 = 180 t a (c) 1.0e-02 1.0e-01 1.0e+00 k = [z th /r th ] 1.0e-03 1.0e-02 1.0e-01 1.0e+00 z z th(j th(j - - c) a) 1.0e+01 1.0e+02 1.0e+03 t(s) p
characteristics ACST1235-8FP 4/13 docid026033 rev 1 figure 6. on-state characteristics (maximum values) figure 7. surge peak on-state current versus number of cycles i(a) tm 1 10 100 012345 v(v) tm t j max : v to = 0.9 v r d = 38 m t j = 25 c t j = 150 c 0.0 0.5 1.0 1.5 2.0 -50 -25 0 25 50 75 100 125 150 2.5 i h ,i l [t j ] / i h ,i l [t j = 25 c] i h ,i l [t j ] / i h ,i l [t j = 25 c] i h i l t j (c) figure 8. non repetitive surge peak on-state current for a sinusoidal pulse with width tp < 10 ms, and corresponding value of i2t figure 9. relative variation of gate trigger current and gate trigger voltage versus junction temperature (typical values) i (a), i t (a s) tsm 2 2 1 10 100 1000 0.01 0.10 1.00 10.00 di/dt limitation: 100 a/s i tsm i2t t(ms) p t j initial = 25 c 0.0 0.5 1.0 1.5 2.0 2.5 3.0 -50 -25 0 25 50 75 100 125 150 i gt ,v gt [t j ] / i gt ,v gt [t j = 25 c] t j (c) i gt q3 i gt q1- q2 v gt q1- q2 - q3 figure 10. relative variation of holding current and latching current versus junction temperature (typical values) figure 11. relative variation of critical rate of decrease of main current (di/dt)c versus reapplied (dv/dt)c 0.0 0.5 1.0 1.5 2.0 -50 -25 0 25 50 75 100 125 150 i h i l t j (c) 2.5 i h ,i l [t j ] / i h ,i l [t j = 25 c] i h ,i l [t j ] / i h ,i l [t j = 25 c] 0 1 2 3 0.1 1.0 10.0 100.0 (di/dt)c [ (dv/dt)c ] / specified (di/dt)c t j =150 c (dv/dt)c (v/s)
docid026033 rev 1 5/13 ACST1235-8FP characteristics 13 figure 12. relative variation of critical rate of decrease of main current versus junction temperature (typical values) figure 13. relative variation of static dv/dt immunity versus junction temperature 0 1 2 3 4 5 6 7 8 9 10 25 50 75 100 125 150 t j (c) (di/dt) c [t j ]/(di/dt) c [t j =150 c] 0 1 2 3 4 25 50 75 100 125 150 t j (c) dv/dt [t j ] / dv/dt [t j = 1 5 0 c] v d = v r = 536 v device exceeding dv/dt = 5 kv/s figre 1 relative variation o leakage crrent verss jnction temeratre or dierent vales o locking voltage (tical vales) figre 15 relative variation o the maximm claming voltage verss jnction temeratre (minimm vales) 1.0e-04 1.0e-03 1.0e-02 1.0e-01 1.0e+00 25 50 75 100 125 150 v drm =v rrm = 800 v v drm =v rrm = 600 v v drm =v rrm = 400 v i drm / i rrm [t j ;v drm / v rrm ] / i drm / i rrm t j (c) v [t ] / v [t = 25 c] cl j cl j 0.85 0.90 0.95 1.00 1.05 1.10 -50 -25 0 25 50 75 100 125 150 t j (c)
application information ACST1235-8FP 6/13 docid026033 rev 1 2 application information 2.1 typical application description the ACST1235-8FP 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 ACST1235-8FP 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. figure 16. ac induction motor control - typical diagram ac motor ac mains mcu v cc rg rg phase shift capacitor + protective air inductance selection of the rotor direction ac induction motor acst acst
docid026033 rev 1 7/13 ACST1235-8FP application information 13 figure 17. universal drum motor control ? typical diagram the ACST1235-8FP device is also very effective in controlling resistive loads. figure 18. resistive load control ? typical diagram ac mains mcu v cc 12 v rg mcu motor direction setting speed motor regulation universal motor acst ac mains lamp or resistance variable resistor capacitor g com out diac
application information ACST1235-8FP 8/13 docid026033 rev 1 2.2 ac line transient voltage ruggedness in comparison with standard triac, which need additional protection components against surge voltage, the ACST1235-8FP is self-protected against overvoltage, specified by the new parameter v cl . the ACST1235-8FP 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 ACST1235-8FP 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 limits 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 ACST1235-8FP folds back safely to the on state as shown in figure 20 . the ACST1235-8FP recovers its blocki ng 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 ac mains filtering unit model of the load acst 2 kv surge r = 11 l = 3 h v = 2 kv , , pp rg = 62 rg r l rgene
docid026033 rev 1 9/13 ACST1235-8FP application information 13 figure 20. typical voltage and current waveforms across the ACST1235-8FP during iec 61000-4-5 standard test 0 0 v i i peak= 180 a v peak 1.2/50 s voltage surge 8/20 s current surge (dl/dt) = 150 a/s bo
package information ACST1235-8FP 10/13 docid026033 rev 1 3 package information ? lead-free package ? recommended torque: 0.4 to 0.6 nm 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. figure 21. to-220fpab dimension definitions h a b dia l7 l6 l5 f1 f2 f d e l4 g1 g l2 l3
docid026033 rev 1 11/13 ACST1235-8FP package information 13 table 6. to-220fpab dimension values ref. dimensions millimeters inches min. max. 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 typ. 0.63 typ. 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
ordering information ACST1235-8FP 12/13 docid026033 rev 1 4 ordering information figure 22. ordering information scheme 5 revision history table 7. ordering information order code marking package weight base qty packing mode ACST1235-8FP acst1235-8 to-220fpab 2.0 g 50 tube acs t fp 12 35 - 8 series ac witch s topology t = triac on-state rms current 12 12 =a sensitivity 35 = 35 ma voltage 880v =0 package fp = to-220fpab table 8. document revision history date revision changes 24-apr-2014 1 first issue.
docid026033 rev 1 13/13 ACST1235-8FP 13 please read carefully: information in this document is provided solely in connection with st products. stmicroelectronics nv and its subsidiaries (?st ?) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described he rein at any time, without notice. all st products are sold pursuant to st?s terms and conditions of sale. purchasers are solely responsible for the choice, selection and use of the st products and services described herein, and st as sumes no liability whatsoever relating to the choice, selection or use of the st products and services described herein. no license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. i f any part of this document refers to any third party products or services it shall not be deemed a license grant by st for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoev er of such third party products or services or any intellectual property contained therein. unless otherwise set forth in st?s terms and conditions of sale st disclaims any express or implied warranty with respect to the use and/or sale of st products including without limitation implied warranties of merchantability, fitness for a particular purpose (and their equivalents under the laws of any jurisdiction), or infringement of any patent, copyright or other intellectual property right. st products are not designed or authorized for use in: (a) safety critical applications such as life supporting, active implanted devices or systems with product functional safety requirements; (b) aeronautic applications; (c) automotive applications or environments, and/or (d) aerospace applications or environments. where st products are not designed for such use, the purchaser shall use products at purchaser?s sole risk, even if st has been informed in writing of such usage, unless a product is expressly designated by st as being intended for ?automotive, automotive safety or medical? industry domains according to st product design specifications. products formally escc, qml or jan qualified are deemed suitable for use in aerospace by the corresponding governmental agency. resale of st products with provisions different from the statements and/or technical features set forth in this document shall immediately void any warranty granted by st for the st product or service described herein and shall not create or extend in any manner whatsoev er, any liability of st. st and the st logo are trademarks or registered trademarks of st in various countries. information in this document supersedes and replaces all information previously supplied. the st logo is a registered trademark of stmicroelectronics. all other names are the property of their respective owners. ? 2014 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - belgium - brazil - canada - china - czech republic - finland - france - germany - hong kong - india - israel - ital y - japan - malaysia - malta - morocco - philippines - singapore - spain - sweden - switzerland - united kingdom - united states of america www.st.com

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