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TPI
Tripolar protection for ISDN interfaces
Features

Bidirectional triple crowbar protection Peak pulse current: IPP = 30 A , 10/1000 s Breakdown voltage: - TPI80N: 80 V - TPI120N: 120 V Available in SO-8 package Low dynamic breakover voltage: - TPI8011N: 120 V - TPI12011N: 170 V
SO-8
Complies with following standards

CCITT K17-K20 - 10/700 s, 1.5 kV - 5/310 s, 38 A VDE 0433 - 10/700 s, 2 kV - 5/310 s, 50 A VDE 0878 - 1.2/50 s, 1.5 kV - 1/20 s, 40 A IEC 61000-4-2 level 4 - 0.5/700 s, 1.5 kV - 0.2/310 s, 38 A
Benefits
Low capacitance from lines to ground, allowing high speed transmission without signal attenuation Good capacitance balance between lines to ensure longitudinal balance Fixed breakdown voltage in both common and differential modes The same surge current capability in both common and differential modes A particular attention has been given to the internal wire bonding. The "4-point" configuration ensures a reliable protection, eliminating overvoltages introduced by the parasitic inductances of the wiring (LdI/dt), especially for very fast transient overvoltages

Description
Dedicated devices for ISDN interface and high speed data telecom line protection. Equivalent to a triple TrisilTM with low capacitance. Figure 1.
Tip GND GND Ring
Functional diagram
1 2 3 4 8 7 6 5 Tip GND GND Ring
TM: Trisil is a trademark of STMicroelectronics
November 2007
Rev 5
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www.st.com 9
Characteristics
TPI
1
Characteristics
Table 1.
Symbol IPP ITSM Tstg Tj TL
Absolute ratings (Tamb = 25 C)
Parameter Peak pulse current (see note (1)) 10/1000 s 5/310 s 2/10 s tp = 10 ms t = 1s Value 30 40 90 8 3.5 - 55 to 150 150 260 Unit A
Non repetitive surge peak on-state current (F = 50 Hz) Storage temperature range Maximum junction temperature Maximum lead temperature for soldering during 10 s.
A C C
1. See Figure 3.
Table 2.
Symbol Rth(j-a)
Thermal resistances
Parameter Junction to ambient Value 170 Unit C/W
Table 3.
Symbol VRM VBR VBO IRM IPP IBO IH VF C
Electrical characteristics (Tamb = 25 C)
Parameter Stand-off voltage Breakdown voltage Breakover voltage Leakage current Peak pulse current Breakover current Holding current Forward voltage drop Capacitance IRM @ VRM VBR @ IR min. V 70 105 V 80 120 mA 1 1 VBO max. note (1) V 110 160 VBO dyn. typ. note (2) V 120 170 IBO max. note (1) mA 800 800 IH min. note(3) mA 150 150
Order code
max. A
TPI8011N TPI12011N
10 10
1. See the reference test circuit 1 (Figure 5.) 2. Surge test according to CCITT 1.5 kV, 10/700 s between Tip or Ring and ground 3. See functional holding current test circuit 2 (Figure 6.)
Figure 2.
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TPI Table 4. Capacitance characteristics
CA (pF) max. 45 15 CB (pF) max. 15 45
Characteristics
CONFIGURATION VA = -1 V VB = -56 V VA = -56 V VB = -1 V
CA - CB (pF) max. 30 30
LINE A
LINE A CA TPIxx CB LINE B
LINE B
Figure 3.
Pulse waveform (10/1000 s)
Figure 4.
ITSM(A)
10 9
Surge peak current versus overload duration
% I PP
10 0
F=50Hz Tj initial=25C
8 7 6
50
5 4 3 2
0 tr
tp
t
1 0 1E-2 1E-1 1E+0
t(s)
1E+1 1E+2 1E+3
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Characteristics Figure 5. Reference test circuit 1
tp = 20 ms Auto Transformer 220 V / 2 A R1 Static relay 140 R2 240 K
220 V
TPI
VOUT IBO, IH measure
D.U.T.
VBO measure
Transformer 220 V / 800 V 2A
TEST PROCEDURE
Pulse test duration (tp = 20 ms): for Bidirectional devices = Switch K is closed for Unidirectional devices = Switch K is open VOUT selection: Device with VBO < 200 V VOUT = 250 VRMS, R1 = 140 Device with VBO > 200 V VOUT = 480 VRMS, R2 = 240
Figure 6.
Functional holding current (IH) test circuit 2
R D.U.T. VBAT = - 48 V Surge generator
- VP
This is a GO-NOGO test which allows to confirm the holding current (IH) level in a functional test circuit.
TEST PROCEDURE
1/ Adjust the current level at the IH value by short circuiting the AK of the D.U.T. 2/ Fire the D.U.T. with a surge current IPP 10 A, 10/1000 s. 3/ The D.U.T. will come back off-state within 50 ms maximum.
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TPI
Application information
2
Application information
Figure 7. Application circuit - U interface protection
A
R or PTC
TPIxx
GND
B
R or PTC
Figure 8.
Application circuit - S interface protection
A
R or PTC TPIxx GND R or PTC
B
A
R or PTC TPIxx GND R or PTC
B
This component uses an intemal structure resulting in symetrical characteristics with a good balanced behaviour. Its topology ensures the same breakdown voltage level for positive and negative surges in differential and common mode.
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Ordering information scheme Figure 9. Connections
TPI
1.
Tip 1 IN OUT 8 Tip
2 GND 3
7 GND 6
2.
Ring
4
IN
OUT
5
Ring
Connect pins 2, 3, 6 and 7 to ground in order to guarantee a good surge current capability for long duration disturbances. To take advantage of the "4-point" structure of the TPIxxxN, the Tip and Ring lines have to cross the device. In this case, the device will eliminate the overvoltages generated by the parasitic inductances of the wiring (LdI/dt), especially for very fast transients.
3
Ordering information scheme
Figure 10. Ordering information scheme
TPI 80 1 1 N RL
Bidirectional Tripolar Protection Breakdown voltage 80 = 80 V Version Package 1 = SO-8 Revision Packing mode RL = Tape and reel Blank = Tube
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TPI
Package information
4
Package information
Epoxy meets UL94, V0
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. Table 5. SO-8 dimensions
Dimensions Ref.
Seating Plane C A2 A1 A h x 45
Millimeters
Inches
Min. Typ. Max. Min. Typ. Max. A 1.75 0.1 0.28 0.17 0.25 0.004 0.049 0.48 0.011 0.23 0.007 0.019 0.009 0.069 0.010
C
k L
A1 b C D E
b ppp C D
e
A2 1.25
L1
4.80 4.90 5.00 0.189 0.193 0.197 5.80 6.00 6.20 0.228 0.236 0.244 1.27 0.25 0.40 1.04 0 8 0.10 0 0.50 0.010 1.27 0.016 0.041 8 0.004 0.050 0.020 0.050
8
5 E1 E
E1 3.80 3.90 4.00 0.150 0.154 0.157 e h L L1 k ppp
1
4
Figure 11. SO-8 footprint, dimensions in mm (inches)
6.8 (0.268) 0.6 (0.024) 4.2 (0.165) 1.27 (0.050)
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Ordering Information
TPI
5
Ordering Information
Table 6. Ordering information
Marking TP80N
(1)
Order code TPI8011N TPI8011NRL TPI12011N TPI12011NRL (1)
1. Prefered device
Package
Weight
Base qty 100 2500
Delivery mode Tube Tape and reel Tube Tape and reel
TP80N SO-8 TP120N TP120N 0.08 g
100 2500
6
Revision history
Table 7.
Date August-2001 02-Aug-2004 07-Nov-2007
Document revision history
Revision 3A 4 5 Last update. VBO dyn. (page 2) and capacitances (page 3) values update. Reformatted to current standards. Updated Package information. Changes
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TPI
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