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this is information on a product in full production. june 2012 doc id 11962 rev 4 1/12 12 acs108-6s overvoltage protected ac switch (acs?) datasheet ? production data features needs no external protection snubber or varistor enables equipment to meet iec 61000-4-5 reduces component count by up to 80% interfaces directly with the micro-controller common package tab connection supports connection of several alternating current switches (acs) on the same cooling pad integrated structure based on a.s.d. ? technology overvoltage protection by crowbar technology high noise immunity - static dv/dt > 500 v/s applications alternating current on/off static switching in appliances and industrial control systems drive of low power high inductive or resistive loads like: ? relay, valve, solenoid, ? dispenser, door lock ? pump, fan, low power motor description the acs108-6s belongs to the ac line switch family. this high performance switch can control a load of up to 0.8 a. the acs108-6s switch includes an overvoltage crowbar structure to absorb the overvoltage energy, and a gate level shifter driver to separate the digital controller from the main switch. it is triggered with a negative gate current flowing out of the gate pin. figure 1. functional diagram ?: a.s.d. is a registered trademark of stmicroelectonics tm: acs is a trademark of stmicroelectronics table 1. device summary symbol value unit i t(rms) 0.8 a v drm /v rrm 600 v i gt 10 ma com out g smbflat-3l acs108-6suf out com g com common drive reference to connect to the mains out output to connect to the load. g gate input to connect to the controller through gate resistor www.st.com
characteristics acs108-6s 2/12 doc id 11962 rev 4 1 characteristics table 2. absolute maximum ratings (t amb = 25 c, unless otherwise specified ) symbol parameter value unit i t(rms) on-state rms current (full sine wave) t amb = 62 c 0.45 a t tab = 113 c 0.8 a i tsm non repetitive surge peak on-state current (full cycle sine wave, t j initial = 25 c) f = 60 hz t = 16.7 ms 7.6 a f = 50 hz t = 20 ms 7.3 i 2 t i2t value for fusing t p = 10 ms 0.38 a 2 s di/dt critical rate of rise of on-state current i g = 2xi gt , tr 100 ns f = 120 hz t j = 125 c 100 a/s v pp non repetitive line peak mains voltage (1) 1. according to test descri bed by iec 61000-4-5 standard and figure 19 t j = 25 c 2 kv i gm peak gate current t p = 20 s t j = 125 c 1 a v gm peak positive gate voltage t j = 125 c 10 v p g(av) average gate power dissipation t j = 125 c 0.1 w t stg t j storage junction temperature range operating junction temperature range -40 to +150 -30 to +125 c table 3. electrical characteristics (t j = 25 c, unless otherwise specified) symbol test conditions quadrant value unit i gt (1) 1. minimum i gt is guaranteed at 10% of i gt max v out = 12 v, r l = 33 ii - iii max. 10 ma v gt ii - iii max. 1 v v gd v out = v drm , r l =3.3 k , t j = 125 c ii - iii min. 0.15 v i h (2) i out = 100 ma max. 25 ma i l (2) i g = 1.2 x i gt max. 30 ma dv/dt (2) 2. for both polarities of out referenced to com v out = 67% v drm , gate open, t j = 125 c min. 500 v/s (di/dt)c (2 ) without snubber (15 v/s), turn-off time 20 ms, t j = 125 c min. 0.3 a/ms v cl i cl = 0.1 ma, t p = 1 ms, t j = 125 c min. 650 v
acs108-6s characteristics doc id 11962 rev 4 3/12 table 4. static electrical characteristics symbol test conditions value unit v tm (1) 1. for both polarities of out referenced to com i tm = 1.1 a, t p = 500 s t j = 25 c max. 1.3 v v to (1) threshold voltage t j = 125 c max. 0.90 v r d (1) t j = 125 c max. 300 m i drm i rrm v out = 600 v t j = 25 c max. 2a t j = 125 c 0.2 ma table 5. thermal resistance symbol parameter value unit r th (j-t) junction to tab (ac) max. 14 c/w r th (j-a) junction to ambient s = 5 cm2 max. 75
characteristics acs108-6s 4/12 doc id 11962 rev 4 figure 2. maximum power dissipation versus on-state rms current (full cycle) figure 3. on-state rms current versus tab temperature (full cycle) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 p(w) 180 i (a) t(rms) 0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00 0 25 50 75 100 125 i (a) t(rms) t (c) c figure 4. on-state rms current versus ambient temperature (free air convection) figure 5. relative variation of thermal impedance junction to ambient versus pulse duration 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0 25 50 75 100 125 i (a) t(rms) t (c) a 1.e-02 1.e-01 1.e+00 1.e-03 1.e-02 1.e-01 1.e+00 1.e+01 1.e+02 1.e+03 k = [z /r ] th(j-a) th(j-a) t (s) p figure 6. relative variation of, holding and latching current versus junction temperature figure 7. releative variation of i gt and v gt versus junction temperature 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 i , [t ] / i , i [t = 25 c] hjhlj i l i l i h t (c) j 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 i , v [t ] / i , v [t = 25 c] gt gt j gt gt j t (c) j v gt i gt
acs108-6s characteristics doc id 11962 rev 4 5/12 figure 8. non repetitive surge peak on-state current versus number of cycles figure 9. non repetitive surge peak on-state current for a sinusoidal pulse, and corresponding value of i2t figure 10. on-state characteristics (maximal values) figure 11. relative variation of critical rate of decrease of main current versus junction temperature 0 1 2 3 4 5 6 7 8 9 10 1 10 100 1000 number of cycles one cycle t = 20 ms i (a) tsm non repetitive t initial = 25 c j repetitive t = 75 c c 0.1 1.0 10.0 100.0 0.01 0.10 1.00 10.00 i (a), i t (a s) tsm 2 2 t initial = 25 c j i2t i tsm t (ms) p pulse with width t <10 ms, and corresponding value of i2t p 0.01 0.10 1.00 10.00 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 i (a) tm v (v) tm t max: v = 0.9 v r = 300 m j to d t = 125 c j t = 25 c j 0 1 2 3 4 5 6 7 8 25 50 75 100 125 (dl / dt) c [t ] / [t = 125 c] jj (dl / dt) c t (c) j figure 12. relative variation of static dv/dt immunity versus junction temperature figure 13. relative variation of the maximal clamping voltage versus junction temperature (min. value) 0 1 2 3 4 5 6 7 8 25 50 75 100 125 dv / dt [t ] / [t = 125 c] jj dv / dt t (c) j 0.85 0.90 0.95 1.00 1.05 1.10 1.15 -30 -10 10 30 50 70 90 110 130 v [t /v [tj = 25c] cl j cl t (c) j
characteristics acs108-6s 6/12 doc id 11962 rev 4 figure 14. relative variation of critical rate ofdecrease of main current (di/dt)c versus (dv/dt)c figure 15. thermal resistance junction to ambient versus copper surface under tab (di/dt) c [(dv/dt) c ] / specified (di/dt) c 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 0.1 1 10 100 (dv/dt) c (v/s) v out = 400 v turn-off time < 20 ms r (c/w) th(j-a) 50 60 70 80 90 100 110 120 130 140 150 160 170 012345 s(cm2) epoxy printed circuit board fr4, copper thickness 35 m
acs108-6s alternating current line switch - basic application doc id 11962 rev 4 7/12 2 alternating current line switch - basic application the acs108-6s switch is triggered by a negative gate current flowing from the gate pin g. the switch can be driven directly by the digital controller through a resistor as shown in figure 16. thanks to its overvoltage protection and turn-off commutation performance, the acs108-6s switch can drive a small power high inductive load with neither varistor nor additional turn-off snubber. figure 16. typical application program 2.1 protection against overvoltage: the best choice is acs in comparison with standard triacs, which are not robust against surge voltage, the acs108-6s is over-voltage self-protected, specified by the new parameter v cl . this feature is useful in two operating conditions: in case of turn-off of very inductive load, and in case of surge voltage that can occur on the electrical network. 2.1.1 high inductive load switch-off: turn-off overvoltage clamping with high inductive and low rms current loads the rate of decrease of the current is very low. an overvoltage can occur when the gate current is removed and the out current is lower than i h . as shown in figure 17 and figure 18 , at the end of the last conduction half-cycle, the load current decreases (1). the load current reaches the holding current level i h (2), and the acs turns off (3). the water valve, as an inductive load (up to 15 h), reacts as a current generator and an overvoltage is created, which is clamped by the acs (4). the current flows through the acs avalanche and decreases linearly to zero. during this time, the voltage across the switch is limited to the clamping voltage v cl . the energy stored in the inductance of the load is dissipated in the clamping section that is designed for this purpose. when the energy has been dissipated, the acs voltage falls back to the mains voltage value (5). ac mains acs108-6s valve power supply mcu v dd v ss rg
alternating current line switch - basic application acs108-6s 8/12 doc id 11962 rev 4 2.1.2 alternating current li ne transient voltage ruggedness the acs108-6s switch is able to withstand safely the ac line transients either by clamping the low energy spikes or by breaking over under high energy shocks, even with high turn-on current rises. the test circuit shown in figure 19 is representative of the final acs108-6s application, and is also used to test the ac switch according to the iec 61000-4-5 standard conditions. thanks to the load limiting the current, the acs108-6s switch withstands the voltage spikes up to 2 kv above the peak line voltage. the protection is based on an overvoltage crowbar technology. actually, the acs108-6s breaks over safely as shown in figure 20 . the acs108-6s recovers its blocking voltage capability after the su rge (switch off back at the next zero crossing of the current). such non-repetitive tests can be done 10 times on each ac line voltage polarity. figure 17. effect of the switching off of a high inductive load - typical clamping capability of acs108-6s figure 18. description of the different steps during switching off of a high inductive load 1 2 3 4 5 i h v peak =v cl 100s/div i (5 ma/div) out v (200 v/div) out i h v cl v out i out 1 2 3 4 5 i h v cl v out i out 1 2 3 4 5 figure 19. overvoltage ruggedness test circuit for resistive and inductive figure 20. typical current and voltage waveforms across the acs108-6s 2.4 kv surge surge generator "1.2/50 waveform" rg 220 acs108-6sx rgene 2 l 5h r 150 model of the load loads with conditions equivalent to iec 61000-4-5 standards i out v peak v out 200ns/div (2 a/div) (200 v/div) during iec 61000-4-5 standard test
acs108-6s ordering information scheme doc id 11962 rev 4 9/12 3 ordering information scheme figure 21. ordering information scheme acs 1 08 - 6 s uf -tr ac switch series number of switches current voltage sensitivity package packing 08 = 0.8 a rms 6 = 600 v s = 10 ma uf = smbflat-3l tr = 13?, 5000 pieces
package information acs108-6s 10/12 doc id 11962 rev 4 4 package information epoxy meets ul94, v0 lead-free packages 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 22. smbflat-3l footprint dimensions table 6. smbflat-3l dimensions ref. dimensions millimeters inches min. typ. max. min. typ. max. a 0.90 1.10 0.035 0.043 b 0.35 0.65 0.014 0.026 b4 1.95 2.20 0.07 0.087 c 0.15 0.40 0.006 0.016 d 3.30 3.95 0.130 0.156 e 5.10 5.60 0.201 0.220 e1 4.05 4.60 0.156 0.181 l 0.75 1.50 0.030 0.059 l1 0.40 0.016 l2 0.60 0.024 e 1.60 0.063 d a l 2x l l2 l1 l1 l2 2x e e1 b4 c e b 2x millimeters (inches) 1.20 (0.047) 2.07 (0.082) 0.51 (0.020) 0.51 (0.020) 1.20 (0.047) 3.44 (0.136) 5.84 (0.230) 2.07 (0.082)
acs108-6s ordering information doc id 11962 rev 4 11/12 5 ordering information 6 revision history 04 table 7. ordering information order code marking package we ight base qty delivery mode ACS108-6SUF-TR acs1086s smbflat-3l 46.91 mg 5000 tape and reel table 8. document revision history date revision changes 05-jan-2005 1 initial release. 07-jun-2006 2 reformatted to current standard. replaced figure 9. 14-dec-2010 3 added epoxy meets ul94, v0 in package information . updated ecopack statement. added smbflat-3l package. updated graphics. 12-jun-2012 4 information regarding to-92 and sot-223 packages transferred to stmicroelectronics datasheet acs108.
acs108-6s 12/12 doc id 11962 rev 4 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 two authorized st representatives, 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. ? 2012 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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