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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 s) 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
Functional diagram
TIP
Gn
Gp
GND
RING
Description
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.
Pin-out configuration
GND Gp TIP TIP TIP TIP GND Gn RING RING RING RING
November 2006
Rev 5
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www.st.com 10
Characteristics
LCP02-150M
1
Table 1.
Characteristics
Complies with the following standards
Peak surge voltage (V) ITU-T K20 ITU-T K21 VDE0433 VDE0878 IEC61000-4-5 FCC Part 68 lightning surge type A FCC Part 68 lightning surge type B BELLCORE GR-1089-CORE First level BELLCORE GR-1089-CORE Second level 6000 1500 6000 1500 2000 2000 level 4 level 4 1500 800 1000 2500 1000 Voltage Required peak waveform (s) current (A) 10/700 10/700 10/700 10/700 10/700 1.2/50 10/700 1.2/50 10/160 10/560 9/720 2/10 10/1000 150 37.5 150 37.5 50 50 100 100 200 100 25 500 100 Current waveform (s) 5/310 5/310 5/310 5/310 5/310 1/20 5/310 8/20 10/160 10/560 5/320 2/10 10/1000 Minimum serial resistor to meet standard (W) -
5000
2/10
500
2/10
-
Table 2.
Symbol
Absolute ratings (Tamb = 25 C)
Parameter 10/1000 s 8/20 s 10/560 s 5/310 s 10/160 s 1/20 s 2/10 s t = 0.2 s t=1s t = 15 min See fFigure 1. Value 100 250 120 150 200 250 500 13 10 3.5 -120 to 0 0 to + 95 190 -20 to +85 - 55 to + 150 260 Unit
IPP
Peak pulse current
A
ITSM VGN max VGP maxD Vbat max Top Tstg TL
Non repetitive surge peak on-state current(sinusoidal)
A
Maximum negative battery voltage rangeMaximum positivebattery voltage rangeTotal battery supply voltage Operating temperature range (1) Storage temperature range Maximum lead temperature for soldering during 10s
V C C C
1. Within the Top range, the LCP02-150M keeps on operating. The impacts of the ambient temperature are given by derating curves.
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LCP02-150M Figure 1. Test circuit
TIP
Characteristics
Gp from +0V to +95V
TIP GND RING RING RING RING Gn TIP TIP TIP Gp
Gn from -110V to +0V
GND
Vbat 190V
RING
Gn connected to negative supply voltage Gp connected to positive supply voltage Vbat: differential voltage between VGn and VGp
Table 3.
Symbol Rth (j-a)
Thermal resistance
Parameter Junction to ambient Value 60 Unit C/W
Table 4.
Symbol IGP IGN IH IRG IRM VRM VDGL VGATE VRG C
Electrical characteristics (Tamb = 25 C)
Parameter Positive gate triggering current Negative gate triggering current Holding current Reverse leakage current GATE / LINE Reverse leakage current Reverse voltage LINE/ GND Dynamic switching voltage GATE / LINE GATE / GND voltage Reverse voltage GATE / LINE Capacitance LINE / GND
VGN VRM IRM IRM IH VRM VGP IH
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Characteristics Table 5.
Symbol IGN IHIRGLVGN/GND = -60 V Measured at 50 Hz Go No-Go test, VGN = -60 V Tj = 25 C, VGN/line = -190 V VGN/GND = -60V 10/1000 s 1 kV RP = 25 IPP = 30 A 10/700 s 2 kV RP = 25 IPP = 30 A 1.2/50 s 2 kV RP = 25 IPP = 30 A 150 5 10 6 12
LCP02-150M Electrical parameters related to the negative suppressor
Test conditions Min. Max. 5 Unit mA mA A
VDGL-
V
Table 6.
Symbol IGP IRGL+
Electrical parameters related to the positive suppressor
Test conditions VGP/GND = 60 V Measured at 50 Hz Tj = 25 C, VGP/line = +190 V VGP/GND = +60V 10/1000 s 1 kV RP = 25 IPP = 30 A 10/700 s 2 kV RP = 25 IPP = 30 A 1.2/50 s 2 kV RP = 25 IPP = 30 A Min. Max. 10 5 12 8 18 Unit mA A
VDGL+
V
Table 7.
Symbol IR Coff
Electrical parameters related to line/gnd
Test conditions 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 Typ. Max. 5 5 Unit A pF
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LCP02-150M
Characteristics
Figure 2.
Non repetitive surge peak on state current versus overload duration (Tj initial = 25 C)
F=50Hz Tj initial=25C
Figure 3.
Relative variation of holding current versus junction temperature
ITSM(A)
25
IH(Tj)/IH[Tj=25C]
2
20 1.5 15 1 10
5
0.5
t(s)
0 0.01 0 0.1 1 10 100 1000 -20 0 20
T(C)
40 60 80 100
Figure 4.
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 10 100
Line -
Line +
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Technical information
LCP02-150M
2
Technical information
Figure 5. LCP02 concept behavior
Rs1
L1
TIP Ign T2 T1 Gn Th1 Th2 Gp
V Tip
Igp
GND
-Vbat
Cn
+Vb
Cp
Rs2
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.
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LCP02-150M Figure 6.
Technical information Protection of SLIC with positive and negative battery voltages
Line card
-Vbat Rs (*) TIP Gn TIP
Line
GND
220nF
LCP02
RING
Gp 220nF
SLIC
RING
Rs (*)
+Vb Rs (*) = PTC or Resistor fuse
Figure 7.
Protection of high voltage SLIC
Line card
Rs (*) TIP Gn TIP -Vbat
Line
GND
220nF
LCP02
RING
Gp
SLIC
RING
Rs (*)
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 Vbat max at 190V. Figure 7. gives the protection topology for the new SLIC using high negative voltage down to -120V.
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Package information
LCP02-150M
3
Package information
Table 8. PowerSO-10 Dimensions
Dimensions Ref.
B
Millimeters Min. Typ. Max. 3.65 0.10 0.60 0.55 9.60 7.60 9.50 7.40 7.60 6.35 6.10 1.27 1.25 13.80 0.50 1.20 1.70 0 8 0 1.80 0.047 1.35 0.049 14.40 0.543 Min. 0.131 0.00 0.016 0.014 0.370 0.291 0.366 0.283 0.283 0.240 0.232
Inches Typ. Max. 0.143 0.004 0.024 0.022 0.378 0.299 0.374 0.291 0.299 0.250 0.240 0.05 0.053 0.567 0.019 0.071 0.067 8
0.10 A B
10 H E
6 E2 E3 E1
A A1 B C D D1 E E1 E2 E3 E4 e
L
DETAIL "A"
3.35 0.00 0.40 0.35 9.40 7.40 9.30 7.20 7.20 6.10 5.90
1
5
SEATING PLANE
e
0.25 M
B
DETAIL "A"
A C
h
D D1
Q
A F A1
SEATING PLANE
A1
F H h L Q a
E4
a
Figure 8.
Footprint (dimensions in mm)
0.54 - 0.60
10.8 - 11.0
In order to meet environmental requirements, ST offers these devices in ECOPACK(R) 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.
14.6 - 14.9 1.27 0.67 - 0.73 9.5
6.30
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LCP02-150M
Ordering information
4
Ordering information
Ordering Type LCP02-150M LCP02-150M LCP02-150M-TR PowerSO-10 1.02 g 600 Tape and Reel Marking Package Weight Base qty 50 Delivery mode Tube
5
Revision history
Date May-2003 31-Oct-2006 Revision 4B 5 Previous release Reformatted to current standards. Negative firing voltage and maximum negative battery voltage changed from -110 V to -120 V throughout the document. Changes
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LCP02-150M
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