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  december 2010 doc id 15238 rev 4 1/13 13 acst12 overvoltage protected ac switch features triac with overvoltage crowbar technology low i gt (<10 ma) or high immunity (i gt <35 ma) version high noise immunity: static dv/dt > 2000 v/s benefits enables equipment to meet iec 61000-4-5 high off-state reliabilit y with planar technology need no external over voltage protection reduces the power passi ve 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 (i gt < 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/s minimum. figure 1. functional diagram tm : acs is a trademark of stmicroelectronics ?: a.s.d. is a registered trademark of stmicroelectronics table 1. device summary symbol value unit i t(rms) 12 a v drm /v rrm 700 v i gt 10 or 35 ma to-220ab acst1210-7t acst1235-7t com out out g d 2 pa k ACST1210-7G acst1235-7g g out com g com out www.st.com
characteristics acst12 2/13 doc id 15238 rev 4 1 characteristics table 2. absolute ratings (limiting values) symbol parameter value unit i t(rms) on-state rms current full sine wave to-220ab d 2 pa k t c = 104 c 12 a d 2 pa k with 1cm 2 of cu t amb = 47 c 2 i tsm non repetitive surge peak on-state current t j initial = 25 c,( full cycle sine wave) f = 60 hz t p = 16.7 ms 126 a f = 50 hz t p = 20.0 ms 120 a i 2 ti 2 t for fuse selection t p = 10 ms 95 a 2 s di/dt critical rate of rise on-state current i g = 2 x i gt, (t r 100 ns) f = 120 hz t j = 125 c 100 a/s v pp non repetitive line peak pulse voltage (1) t j = 125 c 2 kv p g(av) average gate power dissipation t j = 125 c 0.1 w p gm peak gate power dissipation (t p = 20 s) t j = 125 c 10 w i gm peak gate current (t p = 20 s) t j = 125 c 1.6 a t stg storage temperature range - 40 to + 150 c t j operating junction temperature range - 40 to + 125 c t l 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 t j value unit acst1210-7 acst1235-7 unit i gt (1) v out = 12 v, r l = 33 i - ii - iii 25 c max. 10 35 ma v gt v out = 12 v, r l = 33 i - ii - iii 25 c max. 1.0 v v gd v out = v drm , r l = 3.3 i - ii - iii 125 c min. 0.2 v i h (2) i out = 500 ma 25 c max. 30 50 ma i l i g = 1.2 x i gt i - ii - iii 25 c max. 50 70 ma dv/dt (2) v out = 67% v drm , gate open 125 c min. 200 2000 v/s (di/dt)c (2) (dv/dt)c = 15 v/s 125 c min. 5.3 a/ms without snubber min. 14 v cl i cl = 0.1 ma, t p = 1 ms 25 c min. 850 v 1. minimum i gt is guaranteed at 5% of i gt max 2. for both polarities of ou t pin referenced to com pin
acst12 characteristics doc id 15238 rev 4 3/13 table 4. static characteristics symbol test conditions value unit v tm (1) i out = 17 a, t p = 500 s t j = 25 c max. 1.5 v v t0 (1) threshold voltage t j = 125 c max. 0.9 v r d (1) dynamic resistance t j = 125 c max. 30 m i drm i rrm v out = v drm / v rrm t j = 25 c max. 20 a t j = 125 c 1.5 ma 1. for both polarities of ou t pin referenced to com pin table 5. thermal characteristics symbol parameter value unit r th(j-c) junction to case (ac) to-220ab 1.5 c/w d 2 pa k c / w r th(j-a) junction to ambient to-220ab 60 c/w d 2 pak with 1 cm 2 of cu 45 c/w figure 2. maximum power dissipation versus on-state rms current (full cycle) figure 3. on-state rms current versus case temperature (full cycle) p(w) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0123456789101112 =180 i (a) t(rms) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 0 25 50 75 100 125 i t(rms) (a) t c (c) t c (c) figure 4. on-state rms current versus ambient temperature (free air convection full cycle) 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 to-220ab d 2 pak with 1cm 2 of cu t amb (c) k=[z th /r th ] 1.0e-02 1.0e-01 1.0e+00 1.0e-03 1.0e-02 1.0e-01 1.0e+00 1.0e+01 1.0e+02 1.0e+03 z th (j - a) z th (j - c) t p (s)
characteristics acst12 4/13 doc id 15238 rev 4 figure 6. on-state characteristics (maximum values) figure 7. non repetitive surge peak on-state current versus number of cycles (t j initial = 25 c) 1 10 100 1000 012345 i tm (a) t j =25 c t j =125 c t j max : v to = 0.90 v r d = 30 m v tm (v) 0 10 20 30 40 50 60 70 80 90 100 110 120 130 1 10 100 1000 i(a) tsm non repetitive t j initial=25 c one cycle t=20ms repetitive t c =104 c number of cycles figure 8. non repetitive surge peak on-state current for a sinusoidal pulse and corresponding value of i 2 t figure 9. relative variation of gate triggering current and gate voltage versus junction temperature (typical value) i (a), i t (a s) tsm 22 1 10 100 1000 10000 0.01 0.10 1.00 10.00 t j initial=25 c di/dt limitation: 100 a/s i tsm i2t t p (ms) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 -50 -25 0 25 50 75 100 125 i gt q1-q2 v gt q1-q2-q3 i gt q3 t j (c) i , v [t ] / i , v [t = 25 c] gt gt j gt gt j figure 10. relative variation of holding current (i h ) and latching current (i l ) versus junction temperature figure 11. relative variation of critical rate of decrease of main current (di/dt)c versus (dv/dt)c i ,i [t ]/i , i [t = 25 c] h l j h l j 0.0 0.5 1.0 1.5 2.0 2.5 -50 -25 0 25 50 75 100 125 i h i l t j (c) typical values 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 0.1 1 10 100 acst12-7cxx acst12 - 7sxx (di/dt)c[(dv/dt)c] / specified(di/dt)c (dv/dt)c (v/s)
acst12 characteristics doc id 15238 rev 4 5/13 figure 12. relative variation of critical rate of decrease of main current versus junction temperature figure 13. relative variation of static dv/dt immunity versus junction temperature (di/dt)c[t j ] / (di/dt)c[t j =125c] t j (c) 0 1 2 3 4 5 6 7 8 9 10 11 25 50 75 100 125 dv/dt[t j ] / dv/dt[t j =125c] t j (c) 0 1 2 3 4 5 6 7 8 9 10 11 12 25 50 75 100 125 v d =v r =469 v figure 14. relative variation of maximum clamping voltage, v cl versus junction temperature figure 15. variation of thermal resistance junction to ambient versus copper surface under tab 0.85 0.90 0.95 1.00 1.05 1.10 1.15 -50 -25 0 25 50 75 100 125 v [t /v [t = 25 c] cl j cl j t (c) j minimum values 0 10 20 30 40 50 60 70 80 0 5 10 15 20 r (c/w) th(j-a) s (cm2) cu d2pak epoxy printed circuit board fr4, copper thickness = 35 m
application information acst12 6/13 doc id 15238 rev 4 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 compressor electronic starter electronic thermostat acst rg acst power supply ac mains gate driver logical circuitry 1 2 3 ptc compressor with integrated e-starter compressor start switch run switch ptc rg acst power supply gate driver acst rg ac mains compressor with external electronic drive
acst12 application information doc id 15238 rev 4 7/13 figure 17. universal drum motor control ? typical diagram 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 v cl . the acst12 switch can safely withs tand 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 th e 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 capabilit y after the surge and th e next zero crossing current. such a non repetitive test can be done at least 10 times on each ac line voltage polarity. universal motor motor direction setting speed motor regulation rg ac mains stator mcu vcc 12v acst rotor mcu
application information acst12 8/13 doc id 15238 rev 4 figure 18. overvoltage ruggedness test circuit for resistive and inductive loads for iec 61000-4-5 standards figure 19. typical voltage and current waveforms across the acst12 during iec 61000-4-5 standard test ac mains r filtering unit rg model of the load rgene surge generator acst12 2kv surge l r = , l = h, vsurge = 2 kv 20 2 i v 0 0 v peak =v cl 1.2/50 s voltage surge 8/20 s current surge
acst12 ordering information scheme doc id 15238 rev 4 9/13 3 ordering information scheme figure 20. ordering information scheme acs t 12 10 - 7 g tr ac switch topology on-state rms current sensitivity voltage package delivery mode t = triac 12 = 12 a 10 = 10 ma 35 = 35 ma 7 = 700 v g = d2pak t = to-220ab tr = tape and reel (dpak) blank = tube (to-220fpab, dpak)
package information acst12 10/13 doc id 15238 rev 4 4 package information epoxy meets ul94, v0 recommended torque (to-220ab): 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. table 6. to-220ab dimensions ref. 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 d 2.40 2.72 0.094 0.107 e 0.49 0.70 0.019 0.027 f 0.61 0.88 0.024 0.034 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 h2 10 10.40 0.393 0.409 l2 16.4 typ. 0.645 typ. 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 a c d l7 dia l5 l6 l9 l4 f h2 g g1 l2 f2 f1 e m
acst12 package information doc id 15238 rev 4 11/13 figure 21. footprint (dimensions in mm) table 7. d 2 pak dimensions ref. dimensions millimeters inches min. typ. max. min. typ. max. a 4.30 4.60 0.169 0.181 a1 2.49 2.69 0.098 0.106 a2 0.03 0.23 0.001 0.009 b 0.70 0.93 0.027 0.037 b2 1.25 1.40 0.048 0.055 c 0.45 0.60 0.017 0.024 c2 1.21 1.36 0.047 0.054 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 g l l3 l2 b b2 e 2mm min. flat zone a c2 d r a2 v2 c a1 16.90 10.30 8.90 3.70 5.08 1.30
ordering information acst12 12/13 doc id 15238 rev 4 5 ordering information 6 revision history 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 d 2 pak 1.5 g 50 tube ACST1210-7Gtr d 2 pak 1.5 g 1000 tape and reel acst1235-7t acst12357 to-220ab 2.3 g 50 tube acst1235-7g d 2 pak 1.5 g 50 tube acst1235-7gtr d 2 pak 1.5 g 1000 tape and reel 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 other datasheets in this product class. 01-jul-2010 3 updated figure 20. 07-dec-2010 4 updated table 3.
acst12 doc id 15238 rev 4 13/13 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 parti cular purpose (and their equivalents under the laws of any jurisdiction), or infringement of any patent, copyright or other intellectual property right. unless expressly approved in writing by an authorized st representative, st products are not recommended, authorized or warranted for use in milita ry, air craft, space, life saving, or life sustaining applications, nor in products or systems where failure or malfunction may result in personal injury, death, or severe property or environmental damage. st products which are not specified as "automotive grade" may only be used in automotive applications at user?s own risk. 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. ? 2010 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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