STMicroelectronics LCP02-150M Programmable transient voltage suppressor for ringing slic Datasheet

LCP02-150M
Programmable transient voltage suppressor for ringing SLICs
Features
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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
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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
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10/10
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