LCDP1521S Dual line programmable transient voltage suppressor for SLIC protection Features Dual line programmable transient voltage suppressor with separated gates Wide negative firing voltage range: VGn = -175 V max. Low dynamic switching voltages: VFP and VDGL Low gate triggering current: IGT = 5 mA max Peak pulse current: IPP = 40 A (5/310 s) Holding current: IH = 150 mA min. Benefits Figure 1. TIP 1 1 A TrisilTM is not subject to ageing and provides a fail safe mode in short circuit for a better protection. Trisils are used to help equipment to meet various standards such as UL1950, IEC 60950 / CSA C22.2, UL1459 and TIA-968-A (formerly FCC part 68). SO-8 Functional diagram 8 RING 1 Gn1 2 7 GND Gn2 3 6 GND TIP 2 4 5 RING 2 Trisils have UL94 V0 resin approved (Trisils are UL497B approved - file: E136224). Description This device has been especially designed to protect 2 new high voltage, as well as classical SLICs, against transient overvoltages. Positive overvoltages are clamped by 2 diodes. Negative surges are suppressed by 2 thyristors, their breakdown voltage being referenced to -VBAT through the gate. Separated gates allow the SLICs to be supplied by two different voltages. TM: Trisil ,is a trademark of STMicroelectronics February 2012 Doc ID 16268 Rev 2 1/10 www.st.com 10 Characteristics 1 LCDP1521S Characteristics Table 1. Compliant with the following standards STANDARD Peak Surge Voltage Voltage Waveform (V) GR-1089 Core First level GR-1089 Core Second level GR-1089 Core Intra-building ITU-T-K20/K21 ITU-T-K20 (IEC61000-4-2) IEC61000-4-5 TIA-968-A, lightning surge type A TIA-968-A, lightning surge type B Table 2. 2/10 Required Current peak Waveform current (A) Minimum serial resistor to meet standard () 2500 1000 2/10 s 10/1000 s 500 100 2/10 s 10/1000 s 23 30 5000 2/10 s 500 2/10 s 46 1500 2/10 s 100 2/10 s 2 6000 1500 10/700 s 150 37.5 5/310 s 110 0 8000 15000 1/60 ns 4000 4000 10/700 s 1.2/50 s 100 100 5/310 s 8/20 s 60 27 1500 800 10/160 s 10/560 s 200 100 10/160 s 10/560 s 36 24 1000 9/720 s 25 5/320 s 0 ESD contact discharge ESD air discharge 0 0 Thermal resistance Symbol Parameter Value Unit Rth(j-a) Junction to ambient 170 C/W Doc ID 16268 Rev 2 LCDP1521S Characteristics . Table 3. Absolute ratings (0 C < Tj < 70 C, unless otherwise specified) Symbol Value Unit 10/1000 s 8/20 s 10/560 s 5/310 s 10/160 s 1/20 s 2/10 s 25 60 25 40 35 60 90 A t = 0.2 s t=1s t=2s t = 15 mn 5 3.5 3 1.3 A -40 C < Tamb < +85 C -175 V Storage temperature range - 55 to + 150 C Tj Operating junction temperature range - 55 to + 150 C TL Maximum lead temperature for soldering during 10 s 260 C IPP ITSM VGn1, VGn2 Tstg Figure 2. Parameter Peak pulse current Non repetitive surge peak on-state current (50 Hz sinusoidal) Negative battery voltage range Electrical characteristics - definitions (Tamb = 25 C) I Symbol IGT IH IRG VGT VF VFP VDGL VGATE VRG C Parameter Gate triggering current Holding current Reverse leakage current GATE / LINE Gate triggering voltage Forward drop voltage LINE / GND Peak forward voltage LINE / GND Dynamic switching voltage GATE / LINE GATE / GND voltage Reverse voltage GATE / LINE Capacitance LINE / GND VR VF IR V IH IPP Figure 3. Repetitive peak pulse current % IPP tr: rise time (s) tp: pulse duration (s) ex: Pulse waveform 10/1000 s tr = 10 s tp = 1000 s 100 50 0 tr tp t Doc ID 16268 Rev 2 3/10 Characteristics LCDP1521S Table 4. Parameters (Tj = 25C unless otherwise specified) Symbol Min. IGT VLINE = -48 V 0.05 IH VGn = -48 V 150 VGT at IGT IRG VRG = -175 V VRG = -175 V VDGL VF VFP 10/700 s RS = 0 1.5 kV IF = 1 A 10/700 s 1.5 kV RS = 0 C VLINE = -50 V, VRMS = 1 V, F = 1 MHz VLINE = -2 V, VRMS = 1 V, F = 1 MHz CG Max. Unit 5 mA mA 2.5 V Tj = 25 C Tj = 85 C 5 50 A IPP = 37.5 A 5 V 2 V IPP = 37.5 A 8 V Tj = 25 C Tj = 85 C 5 50 A t = 500 s VGn / LINE = -1V, VLINE = -175 V VGn / LINE = -1V, VLINE = -175 V Symbol Typ. VGn = -48 V IR Table 5. 4/10 Test conditions 18 35 pF Recommended gate capacitance Component Gate decoupling capacitance Doc ID 16268 Rev 2 Min. Typ. 100 220 Max. Unit nF LCDP1521S 2 Technical information Technical information The LCDP1521S is particularly optimized for the new telecom applications such as the fiber in the loop, the WLL, the remote central office. In this case, the operating voltages are smaller than in the classical system. This makes the high voltage SLICs particularly suitable. The schematics of Figure 4 shows the topologies most frequently used for these applications. Figure 4. Protection of high voltage SLICs Fuse or PTC -Vbat1 TIP1 TIP Gn1 SLIC1 100 nF Fuse or PTC RING1 RING Fuse or PTC TIP2 TIP2 Gn2 SLIC2 100 nF Fuse or PTC RING2 RING2 -Vbat2 Figure 5. Non repetitive surge peak on-state current versus pulse duration ITSM(A) 15 10 5 0 1.E-02 t(s) 1.E-01 1.E+00 Doc ID 16268 Rev 2 1.E+01 1.E+02 1.E+03 5/10 Technical information Figure 6. 1.5 LCDP1521S Relative variation of holding current versus junction temperature IH[Tj] / IH[Tj = 25 C] 1.4 1.3 1.2 1.1 1.0 0.9 0.8 0.7 -40 6/10 TJ (C) -30 -20 -10 0 10 20 Doc ID 16268 Rev 2 30 40 50 60 70 80 LCDP1521S 3 Ordering information scheme Ordering information scheme Figure 7. Ordering information scheme LCDP 15 2 1 S RL Line card dual protection Holding current 15 = 150 mA Version 2 = devices protected Package 1 = SO-8 Separated gates Packaging RL = Tape and reel Doc ID 16268 Rev 2 7/10 Package information 4 LCDP1521S Package information Epoxy meets UL94, V0 Lead-free package In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK(R) packages, depending on their level of environmental compliance. ECOPACK(R) specifications, grade definitions and product status are available at: www.st.com. ECOPACK(R) is an ST trademark. Table 6. SO-8 dimensions Dimensions Ref Millimeters Inches Min. Typ. Max. Min. A Typ. Max. 1.75 0.069 0.25 0.004 0.010 1.65 0.065 L c1 a1 C a3 a2 a2 A e b 0.1 a1 S E e3 a3 0.65 0.85 0.025 0.033 b 0.35 0.48 0.014 0.019 b1 0.19 0.25 0.007 0.010 C 0.25 0.50 0.50 0.010 0.020 c1 45 (typ) b1 D M 8 5 F 1 4 D 4.8 5.0 0.189 0.197 E 5.8 6.2 0.228 0.244 e 1.27 0.050 e3 3.81 0.150 F 3.8 4.0 0.15 0.157 L 0.4 1.27 0.016 0.050 0.6 0.024 M S Figure 8. Footprint dimensions in mm (inches) Figure 9. 8 (max) Marking 6.8 (0.268) 0.6 (0.024) 4.2 (0.165) XXXXX : Marking ZZ : Manufacturing location Y : Year WW : week xxxxxx a z z y ww 1.27 (0.050) Pin 1 8/10 Doc ID 16268 Rev 2 LCDP1521S 5 Ordering information Ordering information Table 7. 6 Ordering information Order code Marking Package Weight Base qty Delivery mode LCDP1521SRL DP152S SO-8 0.08 g 2500 Tape and reel Revision history Table 8. Document revision history Date Revision Changes 24-Sep-2009 1 First issue. 23-Feb-2012 2 Standardized nomenclature for Gn and Gp. Doc ID 16268 Rev 2 9/10 LCDP1521S 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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