LCP02-150M Programmable transient voltage suppressor for ringing SLICs Features ■ ■ ■ ■ ■ ■ ■ Protection IC recommended for ringing SLICs Wide firing voltage range: from -120 V to + 95 V Low gate triggering current Peak pulse current: IPP = 100 A (10/1000 µs) Holding current: IH = 150 mA min High power dissipation capability UL497B approved (file E136224) PowerS0-10 Main applications ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Dual battery supply voltage SLICs – negative battery supply configuration – negative and positive battery supply configuration Central Office (CO) Private Branch Exchange (PBX) Digital Loop Carrier (DLC) Asymmetrical Digital Subscriber Line (ADSL) Fiber in the Loop (FITL) Wireless Local Loop (WLL) Hybrid Fiber Coax (HFC) ISDN Terminal Adapter Cable modem Description Functional diagram TIP GND RING Pin-out configuration 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. 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-10TM 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. November 2006 Gp Gn GND Gp Gn TIP RING TIP RING TIP RING TIP RING GND Rev 5 1/10 www.st.com 10 Characteristics LCP02-150M 1 Characteristics Table 1. Complies with the following standards Peak surge voltage (V) Voltage Required peak waveform (µs) current (A) Current waveform (µs) Minimum serial resistor to meet standard (W) ITU-T K20 6000 1500 10/700 10/700 150 37.5 5/310 5/310 - ITU-T K21 6000 1500 10/700 10/700 150 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 - Table 2. Absolute ratings (Tamb = 25° C) Symbol IPP ITSM VGN max VGP maxD Vbat max Parameter Value Unit Peak pulse current 10/1000 µs 8/20 µs 10/560 µs 5/310 µs 10/160 µs 1/20 µs 2/10 µs 100 250 120 150 200 250 500 A Non repetitive surge peak on-state current(sinusoidal) t = 0.2 s t=1s t = 15 min 13 10 3.5 A See fFigure 1. -120 to 0 0 to + 95 190 V -20 to +85 °C - 55 to + 150 °C 260 °C Maximum negative battery voltage rangeMaximum positivebattery voltage rangeTotal battery supply voltage Top Operating temperature range (1) Tstg Storage temperature range TL Maximum lead temperature for soldering during 10s 1. Within the Top range, the LCP02-150M keeps on operating. The impacts of the ambient temperature are given by derating curves. 2/10 LCP02-150M Characteristics Figure 1. Test circuit TIP Gp from +0V to +95V Gp TIP TIP TIP TIP GND GND Δ Vbat ≤ 190V Gn RING RING RING RING Gn from -110V to +0V RING Gn connected to negative supply voltage Gp connected to positive supply voltage Δ Vbat: differential voltage between VGn and VGp Table 3. Thermal resistance Symbol Rth (j-a) Table 4. Symbol Parameter Junction to ambient IGN Negative gate triggering current °C/W IH Holding current IRG Reverse leakage current GATE / LINE IRM Reverse leakage current VRM Reverse voltage LINE/ GND VDGL Dynamic switching voltage GATE / LINE VGATE GATE / GND voltage C 60 Parameter Positive gate triggering current VRG Unit Electrical characteristics (Tamb = 25° C) IGP IH Value VGN VRM IRM IRM VRM VGP IH Reverse voltage GATE / LINE Capacitance LINE / GND 3/10 Characteristics LCP02-150M Table 5. Electrical parameters related to the negative suppressor Symbol Test conditions Max. Unit 5 mA IGN VGN/GND = -60 V Measured at 50 Hz IH- Go No-Go test, VGN = -60 V IRGL- Tj = 25° C, VGN/line = -190 V 5 VDGL- VGN/GND = -60V 10/1000 µs 1 kV RP = 25 Ω IPP = 30 A 10/700 µs 2 kV RP = 25 Ω IPP = 30 A 1.2/50 µs 2 kV RP = 25 Ω IPP = 30 A 10 6 12 Table 6. 150 mA µA V Electrical parameters related to the positive suppressor Symbol Max. Unit VGP/GND = 60 V Measured at 50 Hz 10 mA IRGL+ Tj = 25° C, VGP/line = +190 V 5 µA VDGL+ VGP/GND = +60V 10/1000 µs 1 kV RP = 25 Ω IPP = 30 A 10/700 µs 2 kV RP = 25 Ω IPP = 30 A 1.2/50 µs 2 kV RP = 25 Ω IPP = 30 A 12 8 18 IGP Table 7. Symbol IR Coff 4/10 Min. Test conditions Min. V Electrical parameters related to line/gnd Test conditions Typ. Tj = 25° C, VLINE = +90 V, VGP/LINE = +1 V Tj = 25° C, VLINE = -105 V, VGN/LINE = -1 V VR = -3 V, F =1 MHz, VGP = 60 V, VGN = -60 V 150 Max. Unit 5 5 µA pF LCP02-150M Figure 2. Characteristics Non repetitive surge peak on state current versus overload duration (Tj initial = 25° C) Figure 3. Relative variation of holding current versus junction temperature ITSM(A) 25 F=50Hz Tj initial=25C IH(Tj)/IH[Tj=25°C] 2 20 1.5 15 1 10 0.5 5 T(°C) t(s) 0 0 0.01 0.1 Figure 4. 1 10 100 1000 -20 0 20 40 60 80 100 Variation of junction capacitance versus reverse voltage applied (typical calues) with: VGN = -90V and VGP = +90V C(pF) 200 180 160 140 120 100 Vline (V) 80 1 10 Line - 100 Line + 5/10 Technical information 2 LCP02-150M Technical information Figure 5. LCP02 concept behavior Rs1 L1 TIP GND -Vbat V Tip T2 Ign T1 Th1 Th2 Gn Gp +Vb Cp Cn Rs2 Igp RING GND L2 V Ring 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 battery 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 IH- is temperature dependant as per Figure 2. 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 IH+ is temperature dependant and is equal to 30 mA at 25° C. The capacitors CN and CP are used to speed up the crowbar structure firing during the fast surge 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 LCP02150M gate pins (GN and GP) and to the reference ground track (or plan). The optimized value for CN and CP is 220 nF. The series resistors Rs1 and Rs2 represent the fuse, fuse resistors or the PTCs which are needed to withstand 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) Where: Vsurge = 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 modem, fiber in the loop, WLL systems, and decentralized central office for example. The schematics of Figure 6. and Figure 7. give the 2 most frequent topologies used for these emergent applications. 6/10 LCP02-150M Figure 6. Technical information Protection of SLIC with positive and negative battery voltages Line card -Vbat Rs (*) TIP Gn Line TIP LCP02 220nF GND Gp SLIC 220nF RING Rs (*) RING +Vb Rs (*) = PTC or Resistor fuse Figure 7. Protection of high voltage SLIC Line card -Vbat Rs (*) TIP Gn Line 220nF GND TIP LCP02 RING Gp SLIC Rs (*) RING Rs (*) = PTC or Resistor fuse Figure 6. shows the classical protection topology for SLIC using both positive and negative battery voltages. 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 +95 V while -Vbat can be programmed down to -120 V. Please note that the differential voltage must not exceed ΔVbat max at 190V. Figure 7. gives the protection topology for the new SLIC using high negative voltage down to -120V. 7/10 Package information 3 LCP02-150M Package information Table 8. PowerSO-10 Dimensions Dimensions Ref. Millimeters Inches B Min. Typ. Max. Min. Typ. Max. 0.10 A B 10 H 6 E E3 E1 E2 1 5 SEATING PLANE e B C D D1 3.35 3.65 0.131 0.143 A1 0.00 0.10 0.00 0.004 B 0.40 0.60 0.016 0.024 C 0.35 0.55 0.014 0.022 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 A DETAIL "A" 0.25 M h A Q A F SEATING PLANE A1 A1 e L DETAIL "A" a E4 1.27 1.25 1.35 0.049 0.053 H 13.80 14.40 0.543 0.567 h L 0.50 1.20 a 0.019 1.80 Q Figure 8. 0.05 F 0.047 1.70 0° 0.071 0.067 8° 0° 8° Footprint (dimensions in mm) 0.54 - 0.60 6.30 10.8 - 11.0 14.6 - 14.9 1.27 0.67 - 0.73 9.5 In order to meet environmental requirements, ST offers these devices in ECOPACK® packages. These packages have a lead-free second level interconnect. The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com. 8/10 LCP02-150M 4 Ordering information Ordering information Ordering Type Marking Package Weight LCP02-150M PowerSO-10 1.02 g Base qty Delivery mode 50 Tube 600 Tape and Reel LCP02-150M LCP02-150M-TR 5 Revision history Date Revision May-2003 4B 31-Oct-2006 5 Changes Previous release Reformatted to current standards. Negative firing voltage and maximum negative battery voltage changed from -110 V to -120 V throughout the document. 9/10 LCP02-150M 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 herein at any time, without notice. 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