1/9 a.s.d.? LCP02-150M ? n protection ic recommended for ringing slics. n wide firing voltage range: from -110v to +95v. n low gate triggering current n peak pulse current: i pp = 100a (10/1000s) . n holding current: i h = 150ma min. n high power dissipation capability n ul497b approved (file e136224) features powers0-10? the LCP02-150M has been developed to protect slics operating on both negative and positive supplies, as well as on high voltage slics. it provides crowbar mode protection for both tip and ring lines. the surge suppression is assumed for each wire by two thyristor structures, one dedicated to positive surges the second one to negative surges. both positive and negative threshold levels are programmable by two gates (gn and gp). the use of transistors decreases the battery currents during surge suppression. the LCP02-150M has high bellcore core, itu-t and fcc part 68 lightning surge ratings, ensuring rugged performance in the field. the choice of the powerso-10 tm package is driven by its high power dissipation capability. in addition, the LCP02-150M is also specified to assist a designer to comply with ul1950, iec950 and csa c22.2. it is ul 497b approved (file e136224), and has ul94-v0 resin approved description december 2001 - ed: 2b gn tip gp gnd ring functional diagram tm: asd is trademarks of stmicroelectronics. protection ic for ringing slics n dual battery supply voltage slics - negative battery supply configuration - negative & positive battery supply configuration n central office (co) n private branch exchange (pbx) n digital loop carrier (dlc) n asymmetrical digital subscriber line (adsl) n fiber in the loop (fitl) n wireless local loop (wll) n hybrid fiber coax (hfc) n isdn terminal adapter n cable modem main applications gnd tip tip ring ring nc g p g n nc nc nc gnd pin-out configuration
LCP02-150M 2/9 peak surge voltage (v) voltage waveform (s) required peak current (a) current waveform (s) minimum serial resistor to meet standard ( ) itu-t k20 4000 1500 10/700 10/700 100 37.5 5/310 5/310 - - itu-t k21 4000 1500 10/700 10/700 100 37.5 5/310 5/310 - - vde0433 2000 10/700 50 5/310 - vde0878 2000 1.2/50 50 1/20 - iec61000-4-5 level 4 level 4 10/700 1.2/50 100 100 5/310 8/20 - - fcc part 68 lightning surge type a 1500 800 10/160 10/560 200 100 10/160 10/560 - - fcc part 68 lightning surge type b 1000 9/720 25 5/320 - bellcore gr-1089-core first level 2500 1000 2/10 10/1000 500 100 2/10 10/1000 - - bellcore gr-1089-core second level 5000 2/10 500 2/10 - complies with following standards symbol parameter value unit i pp peak pulse current 10/1000 m s 5/310 m s 1/20 m s 100 130 500 a i tsm non repetitive surge peak on-state current (f = 50hz) t p = 0.2 s t p =1s t p =15min 13 10 3.5 a v gn max v gp max d v bat max maximum negative battery voltage range maximum positive battery voltage range total battery supply voltage see fig.1 -110 to 0 0to+95 190 v t op operating temperature range (see note 1) -20 to +85 c t stg storage temperature range -55to+150 c t l lead solder temperature (10s duration) 260 c absolute maximum ratings (t amb =25c) note 1 : within the top range, the LCP02-150M keeps on operating. the impacts of the ambient temperature are given by derating curves.
LCP02-150M 3/9 symbol parameter value unit r th (j-a) junction to ambient 60 c/w thermal resistance tip ring gn from -110v to +0v gp from +0v to +95v d vbat 190v gn connected to negative supply voltage gp connected to positive supply voltage v t: differential voltage between v and v d ba gp gn tip tip ring ring nc g p g n nc nc nc gnd fig. 1: test circuit
LCP02-150M 4/9 symbol parameter test conditions min. max. unit i gn negative gate trigger current v gn/gnd = -60v measured at 50hz 5ma i h- holding current (see fig.2) go-no go test, v gn = -60v 150 ma i rgl- reverse leakage current gn/line tj = 25c, v gn/line = -190v 5a v dgl- dynamic switching voltage gate / line v gn/gnd = -60v 10/1000s 1kv r p =25 w i pp = 30a 10/700s 2kv r p =25 w i pp = 30a 1.2/50s 2kv r p =25 w i pp = 30a 10 6 12 v 1 - parameters related to the negative suppressor symbol parameter test conditions min. max. unit i gp positive gate trigger current v gp/gnd = 60v measured at 50hz 10 ma i rgl+ reverse leakage current gp/line tj = 25c, v gp/line = +190v 5a v dgl+ dynamic switching voltage gate / line v gp/gnd = +60v 10/1000s 1kv r p =25 w i pp = 30a 10/700s 2kv r p =25 w i pp = 30a 1.2/50s 2kv r p =25 w i pp = 30a 12 8 18 v 2 - parameters related to the positive suppressor symbol parameter test conditions typ. max. unit i r reverse leakage current tj = 25c, v line = +90v, v gp/line = +1v tj = 25c, v line = -105v, v gn/line = -1v 5 5 m a c off capacitance line/gnd v r = -3v, f =1mhz, v gp = 60v, v gn = -60v 150 pf 3 - parameters related to line/gnd electrical characteristics (t amb = 25c)
LCP02-150M 5/9 ih(t)/ih(25c) 0 0.5 1 1.5 2 - 20 0 20 40 60 80 100 t(c) fig. 2: relative variation of holding current versus junction temperature. 0.01 0.1 1 10 100 1000 0 5 10 15 20 25 t(s) itsm(a) f=50hz tj initial=25c fig. 3: maximum non repetitive surge peak on state current versus overload duration. 80 100 120 140 160 180 200 1 10 100 vline (v) c(pf) line - line + line - line + fig. 4: capacitance versus reverse applied voltage (typical values) with v gn = -90v and v gp = +90v.
LCP02-150M 6/9 figure 5 shows the classical protection circuit using the LCP02-150M crowbar concept. this topology has been developped to protect the new two-battery voltage slics. it allows both positive and negative firing thresholds to be programmed. the LCP02-150M has two gates (gn and gp). gn is biased to negative bat- tery voltage -vbat, while gp is biased to the positive battery voltage +vb. when a negative surge occurs on one wire (l1 for example), a current ign flows through the base of the transistor t1 and then injects a current in the gate of the thyristor th1 which fires. the entire surge current flows through the ground. after the surge, when the current flowing through th1 becomes less negative than the negative holding current, th1 switches off. this holding current i h- is temperature dependant as per figure2. when a positive surge occurs on one wire (l1 for example), a current igp flows through the base of the transistor t2 and then injects a current in the gate of the thyristor th2 which fires. the entire surge current flows through the ground. after the surge, when the current flowing through th2 becomes less positive than the positive holding current ih+, th2 switches off. this holding current i h+ is temperature dependant and is equal to 30ma at 25c. the capacitors cn and cp are used to speed up the crowbar structure firing during the fast rise or falling edges. this allows to minimize the dynamical breakover voltage at the slic tip and ring inputs during fast surges. please note that these capacitors are generally available around the slic. to be efficient they have to be as close as possible to the LCP02-150M gate pins (gn and gp) and to the reference ground track (or plan). the optimized value for cn and cp is 220nf. the series resistors rs1 and rs2 represent the fuse, fuse resistors or the ptcs which are needed to with- stand the power contact or the power induction tests imposed by the country standards. taking this factor into account, the actual lightning surge current flowing through the LCP02-150M is equal to : i surge = vsurge / (rg + rs) with v surge = peak surge voltage imposed by the standard. rg = series resistor of the surge generator rs = series resistor of the line card (e.g. ptc) the LCP02-150M topology is particularly optimized for the new telecom applications such as cable mo- dem, fiber in the loop, wll systems, and decentralized central office for example. the schematics of figures 6 and 7 give the 2 most frequent topologies used for these emergent applications. technical information cp gn tip ring gp gnd -vbat +vb cn rs1 rs2 l 1 l 2 gnd v tip th1 th2 t1 t2 ign igp v ring fig. 5: lcp02 concept behavior.
LCP02-150M 7/9 gn gp gnd tip ring -vbat +vb lcp02 220nf slic rs (*) rs (*) line line card tip ring 220nf rs (*) = ptc or resistor fuse fig. 6: protection of slic with positive and negative battery voltages. gn gp gnd tip ring -vbat lcp02 220nf slic rs (*) rs (*) line line card tip ring rs (*) = ptc or resistor fuse fig. 7: protection of high voltage slic figure 6 shows the classical protection topology for slic using both positive and negative battery volt- ages. with such a protection the slic is protected against surge over +vb and lower than -vbat. in this case, +vb can be programmed up to +95v while -vbat can be programmed down to -110v. please note that the differential voltage does not exceed d v bat max at 190v. figure 7 gives the protection topology for the new slic using high negative voltage down to -110v.
LCP02-150M 8/9 e2 e 1 10 5 6 h eb 0.25 m d h a f a1 e4 e3 e1 seating plane seating plane a b c q detail "a" 0.10 a b l a1 a detail "a" d1 package mechanical data powerso-10? (plastic) ref. dimensions millimeters inches min. max. min. max. a 3.35 3.65 0.131 0.143 a1 0.00 0.10 0.00 0.0039 b 0.40 0.60 0.0157 0.0236 c 0.35 0.55 0.0137 0.0217 d 9.40 9.60 0.370 0.378 d1 7.40 7.60 0.291 0.299 e 9.30 9.50 0.366 0.374 e1 7.20 7.40 0.283 0.291 e2 7.20 7.60 0.283 0.299 e3 6.10 6.35 0.240 0.250 e4 5.90 6.10 0.232 0.240 e 1.27 typ. 0.05 typ. f 1.25 1.35 0.0492 0.0531 h 13.80 14.40 0.543 0.567 h 0.5 typ. 0.019 typ. l 1.20 1.80 0.0472 0.0708 q 1.70 typ 0.067 typ. a 0808 6.30 10.8 - 11.0 1.27 9.5 0.67 - 0.73 14.6 - 14.9 0.54 - 0.60 footprint
LCP02-150M 9/9 information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specifications mentioned in this publication are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics products are not authorized for use as critical components in life support devices or systems without express written ap- proval of stmicroelectronics. the st logo is a registered trademark of stmicroelectronics ? 2001 stmicroelectronics - printed in italy - all rights reserved. stmicroelectronics group of companies australia - brazil - canada - china - finland - france - germany hong kong - india - israel - italy - japan - malaysia - malta - morocco - singapore spain - sweden - switzerland - united kingdom - united states. http://www.st.com ordering type marking package weight base qty delivery mode LCP02-150M lcp02 powerso-10 1.02 g 50 tube LCP02-150M-tr 600 tape & reel order code
|
