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this is information on a product in full production. july 2014 docid022948 rev 1 1/12 12 ACS108-8SUN overvoltage protected ac switch (acs?) datasheet ? production data features ? less footprint area than sot-223 (saves pcb) ? ecopack ? 2 compliant component ? thinner option versus sot-223 (1.1 mm max. thickness) ? enables equipment to meet iec 61000-4-5 ? high noise immunity against static dv/dt and iec 61000-4-4 burst ? overvoltage protection by crowbar technology ? needs no external protection snubber or varistor ? reduces component count by up to 80% and interfaces directly with the micro-controller ? v cl gives headroom before clamping then crowbar action ? common package tab connection supports connection of several alternating current switches on the same cooling pad 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, ? pump, fan, low power motor, door lock, ?lamp description the ACS108-8SUN belongs to the ac line switch range (built with a.s.d. ? technology).this high performance switch can control a load of up to 0.8 a. the ACS108-8SUN 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 ?: ecopack2 is a registered trademark of stmicroelectronics tm: acs is a trademark of stmicroelectronics ?: a.s.d. is a registered trademark of stmicroelectronics com out g smbflat-3l table 1. device summary symbol value unit i t(rms) 0.8 a v drm / v rrm 800 v i gt 10 ma 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 ACS108-8SUN 2/12 docid022948 rev 1 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) s = 0.5 cm2 t amb = 75 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 13.7 a f = 50 hz t = 20 ms 13 i 2 t i2t value for fusing t p = 10 ms 1.1 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 pulse mains voltage (1) 1. according to test described 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 i out = 100 ma max. 10 ma i l i g = 1.2 x i gt max. 25 ma dv/dt v out = 402 v, gate open, t j = 125 c min. 2000 v/s v out = 536 v, gate open, t j = 125 c min. 400 v/s (di/dt)c without snubber (15 v/s), turn-off time 20 ms, t j = 125 c min. 2 a/ms v cl i cl = 0.1 ma, t p = 1 ms, t j = 125 c min. 850 v
docid022948 rev 1 3/12 ACS108-8SUN characteristics table 4. static electrical characteristics symbol test conditions value unit v tm (1) 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. 0.85 v r d (1) dynamic resistance t j = 125 c max. 300 m i drm i rrm v out = v drm = v rrm t j = 25 c max. 2a t j = 125 c 0.2 ma 1. for both polarities of out referenced to com 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 = 0.5 cm2 max. 130 figure 2. maximum power dissipation versus on-state rms current (full cycle) figure 3. on-state rms current versus tab temperature (full cycle) p(w) 0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 i(a) t(rms) 180 = 180 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 0 25 50 75 100 125 = 180 smbflat - 3l t (c) tab i(a) t(rms) 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 0 25 50 75 100 125 single layer printed circuit board fr4 natural convection smbflat-3l copper surface area = 5 cm2 smbflat-3l copper surface area = 0.5 cm2 = 180 t (c) a i(a) t(rms) 0.01 0.10 1.00 1.0e-03 1.0e-02 1.0e-01 1.0e+00 1.0e+01 1.0e+02 1.0e+03 k=[z th /r th ] z th(j-a) smbflat-3l copper surface area = 5cm2 z th(j-c) t (s) p
characteristics ACS108-8SUN 4/12 docid022948 rev 1 figure 6. relative variation of holding and latching current versus junction temperature figure 7. relative variation of i gt and v gt versus junction temperature 0.0 0.5 1.0 1.5 2.0 2.5 3.0 -50 -25 0 25 50 75 100 125 i h ,i l [t j ]/i h ,i l [t j =25 c] i h i l t j (c) i gt ,v gt [t j ]/i gt ,v gt ,[t j =25 c] 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 -50 -25 0 25 50 75 100 125 i gt q2 v gt q2-q3 i gt q3 t j (c) figure 8. 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 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 1 10 100 1000 non repetitive t j initial = 25 c one cycle t = 20 ms smbflat-3l repetitive t tab = 113 c number of cycles i (a) t(rms) 1.e-01 1.e+00 1.e+01 1.e+02 1.e+03 0.01 0.10 1.00 10.00 i tsm (a), i2t (a2s) t j initial = 25 c i tsm i2t t p (ms) figure 10. on-state characteristics (maximum values) figure 11. relative variation of critical rate of decrease of main current versus junction temperature i tm (a) 0.10 1.00 10.00 100.00 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 t j max.: v to = 0.85 v r d = 300 m tj=25 c tj=125 c v tm (v) (di/dt) [t ] / (di/dt) [t =125 c] cc jj 0.0 0.5 1.0 1.5 2.0 2.5 25 35 45 55 65 75 85 95 105 115 125 t (c) j
docid022948 rev 1 5/12 ACS108-8SUN characteristics figure 12. relative variation of static dv/dt immunity versus junction temperature figure 13. relative variation of leakage current versus junction temperature 0 1 2 3 4 5 6 7 8 9 10 11 12 13 25 50 75 100 125 dv/dt [t j ;v d =v r ] /dv/dt [t j =125c;v d =v r = 536 v] v d =v r =536v v d =v r =402v value above 5 kv t j (c) 1.0e-03 1.0e-02 1.0e-01 1.0e+00 25 50 75 100 125 i drm /i rrm [tj;v drm/ v rrm ]/i drm /i rrm [tj=125c;800 v] v drm =v rrm =800 v t j (c) figure 14. relative variation of critical rate of decrease of main current (dl/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 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 0.1 1.0 10.0 100.0 tj =125 c (dv/dt) c (v/s) 50 60 80 100 120 140 160 180 012345 r th(j-a) (c/w) smbflat-3l printed circuit board fr4 copper thickness = 35 m s cu (cm2)
alternating current line switch - basic application ACS108-8SUN 6/12 docid022948 rev 1 2 alternating current line switch - basic application the ACS108-8SUN 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 ACS108-8SUN 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 ACS108-8SUN 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 c onduction half-cycl e, the load current decreases (1). the load current reaches the holding current level i h (2), and the ACS108-8SUN 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 ACS108-8SUN (4). the current flows through the ACS108-8SUN 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 ACS108-8SUN voltage falls back to the mains voltage value (5)(230 v rms , 50 hz). ac mains ACS108-8SUN valve power supply mcu v dd v ss rg v t i t
docid022948 rev 1 7/12 ACS108-8SUN alternating current line switch - basic application 2.1.2 alternating current line transient voltage ruggedness the ACS108-8SUN switch is able to withstand safely the ac line transients either by clamping the low energy spikes or by breaking ov er under high energy shocks, even with high turn-on current rises. the test circuit shown in figure 19 is representative of the final ACS108-8SUN 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 ACS108-8SUN 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 ACS108-8SUN breaks over safely as shown in figure 20 . the ACS108-8SUN recovers its blocking voltage capability after the surge (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 19. overvoltage ruggedness test circuit for resistive and inductive loads with conditions equivalent to iec 61000-4-5 standards figure 17. effect of the switching off of a high inductive load - typical clamping capability of ACS108-8SUN (t amb = 25 c) 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 load 220 ACS108-8SUN 150 5 h +2 kv surge generator c c out g com mains voltage 230 v rms 50 hz i t v t
alternating current line switch - basic application ACS108-8SUN 8/12 docid022948 rev 1 figure 20. typical current and voltage waveforms across the ACS108-8SUN (+2 kv surge, iec 61000-4-5 standard) i t (4 a/div) v t (200 v/div) i t max = 17.2 a di t /dt = 72 a/us 500 ns/div
docid022948 rev 1 9/12 ACS108-8SUN package information 3 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 21. smbflat-3l dimension definitions 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 l2x l l2 l1 l1 l2 2x e e1 b4 c e b 2x
package information ACS108-8SUN 10/12 docid022948 rev 1 figure 22. smbflat-3l footprint dimensions 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)
docid022948 rev 1 11/12 ACS108-8SUN ordering information 4 ordering information figure 23. ordering information scheme 5 revision history 04 table 7. ordering information order code marking package weight base qty delivery mode ACS108-8SUN-tr a088n smbflat-3l 0.2 g 2000 tape and reel acs 1 08 - 8 s un -tr ac switch series number of switches 1 = 1 switch current 08 = 0.8 a rms voltage 8 = 800 v sensitivity s = 10 ma package un = smbflat-3l packing tr = 13?, 5000 pieces table 8. document revision history date revision changes 30-jul-2014 1 initial release.
ACS108-8SUN 12/12 docid022948 rev 1 important notice ? please read carefully stmicroelectronics nv and its subsidiaries (?st?) reserve the right to make changes, corrections, enhancements, modifications, and improvements to st products and/or to this document at any time without notice. purchasers should obtain the latest relevant in formation on st products before placing orders. st products are sold pursuant to st?s terms and conditions of sale in place at the time of o rder acknowledgement. purchasers are solely responsible for the choice, selection, and use of st products and st assumes no liability for application assistance or the design of purchasers? products. no license, express or implied, to any intellectual property right is granted by st herein. resale of st products with provisions different from the information set forth herein shall void any warranty granted by st for such product. st and the st logo are trademarks of st. all other product or service names are the property of their respective owners. information in this document supersedes and replaces information previously supplied in any prior versions of this document. ? 2014 stmicroelectronics ? all rights reserved

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