TPI
Tripolar protection for ISDN interfaces
Features
■
■
■
■
■
Bidirectional triple crowbar protection
Peak pulse current:
I
PP
= 30 A , 10/1000 µs
Breakdown voltage:
– TPI80N: 80 V
– TPI120N: 120 V
Available in SO-8 package
Low dynamic breakover voltage:
– TPI8011N: 120 V
– TPI12011N: 170 V
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 (Ld
I
/dt), especially for very fast transient overvoltages
SO-8
Complies with following standards
■
■
■
■
CCITT K17-K20
– 10/700 µs, 1.5 kV
– 5/310 µs, 38 A
VDE 0433
– 10/700 µs, 2 kV
– 5/310 µs, 50 A
VDE 0878
– 1.2/50 µs, 1.5 kV
– 1/20 µs, 40 A
IEC 61000-4-2 level 4
– 0.5/700 µs, 1.5 kV
– 0.2/310 µs, 38 A
Description
Dedicated devices for ISDN interface and high speed data telecom line protection. Equivalent to a triple Trisil™ with low capacitance.
Figure 1.
Functional diagram
Tip 1
GND 2
GND 3
Ring 4
8 Tip
7 GND
6 GND
5 Ring
TM: Trisil is a trademark of STMicroelectronics
November 2007 Rev 5 1/9 www.st.com
9
Characteristics
1 Characteristics
TPI
Table 1.
Symbol
I
PP
I
TSM
Table 2.
Symbol
Absolute ratings (T amb
= 25 °C)
Thermal resistances
Parameter
Peak pulse current (see note
(1)
)
Non repetitive surge peak on-state current (F = 50 Hz)
T stg
T j
T
L
Storage temperature range
Maximum junction temperature
Maximum lead temperature for soldering during 10 s.
1.
See
Figure 3.
Parameter
10/1000 µs
5/310 µs
2/10 µs t p
= 10 ms t = 1s
Value
30
40
90
8
3.5
- 55 to 150
150
260
Value
170
Unit
A
A
°C
°C
Unit
°C/W R th(j-a)
Table 3.
Symbol
Junction to ambient
Electrical characteristics (T amb
Parameter
= 25 °C)
V
RM
V
BR
V
BO
I
RM
I
PP
I
BO
I
H
V
F
C
Stand-off voltage
Breakdown voltage
Breakover voltage
Leakage current
Peak pulse current
Breakover current
Holding current
Forward voltage drop
Capacitance
I
RM
@ V
RM
V
BR
@ I
R
V
BO
Order code
TPI8011N
TPI12011N max.
µA
10
10
V
70
105 min.
V
80
120 mA
1
1 max.
note
(1)
V
110
160
1.
See the reference test circuit 1 ( Figure 5.
)
2.
Surge test according to CCITT 1.5 kV, 10/700 µs between Tip or Ring and ground
3.
See functional holding current test circuit 2
( Figure 6.
)
V
BO dyn.
typ.
note
(2)
V
120
170
Figure 2.
I
BO max.
note
(1)
mA
800
800
I
H min.
note
(3) mA
150
150
2/9
TPI
Table 4.
Capacitance characteristics
CONFIGURATION
C
A
(pF) max.
V
A
= -1 V
V
B
= -56 V
V
A
= -56 V
V
B
= -1 V
45
15
C
B
(pF) max.
15
45
LINE A
LINE B
TPIxx
LINE A
CA
LINE B
C B
Characteristics
C
A
- C
B
(pF) max.
30
30
Figure 3.
Pulse waveform (10/1000 µs)
% I
PP
10 0
50
0 t r t p t
Figure 4.
Surge peak current versus overload duration
10
I TSM (A)
9
8
7
6
5
4
3
2
1
0
1E-2 1E-1 1E+0 t(s)
1E+1
F=50Hz
Tj initial=25°C
1E+2 1E+3
3/9
Characteristics
Figure 5.
Reference test circuit 1
Auto
Transformer
220 V / 2 A
Static relay tp = 20 ms
R1
140 Ω
R2
240
Ω
VOUT
K
IBO, IH measure
D.U.T.
VBO measure
Transformer
220 V / 800 V
2 A
TEST PROCEDURE
Pulse test duration (tp = 20 ms):
● for Bidirectional devices = Switch K is closed
● for Unidirectional devices = Switch K is open
V
OUT
● selection:
Device with V
BO
< 200 V ➔ V
OUT
● Device with V
BO
> 200 V ➔ V
OUT
= 250 V
RMS
, R1 = 140
= 480 V
RMS
, R2 = 240
Ω
Ω
Figure 6.
Functional holding current (I
H
) test circuit 2
R
D.U.T.
V
BAT
= - 48 V
- V
P
Surge generator
TPI 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 ➔ I
PP 10 A, 10/1000 µs.
3/ The D.U.T. will come back off-state within 50 ms maximum.
4/9
TPI 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
TPIxx
B
R or PTC
GND
R or PTC
A
TPIxx
B
GND
R or PTC
R or PTC
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.
5/9
Ordering information scheme
Figure 9.
Connections
TPI
Tip
GND
Ring
1 IN
2
3
4 IN
OUT 8
7
6
OUT 5
Tip
GND
Ring
1.
Connect pins 2, 3, 6 and 7 to ground in order to guarantee a good surge current capability for long duration disturbances.
2. 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
6/9
TPI Package information
● Epoxy meets UL94, V0
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.
Table 5.
SO-8 dimensions b ppp C
8
1
D e
5
4
A2 A
Seating
Plane
C
C
A1 k
E1 E
Dimensions
Ref.
Millimeters Inches h x 45°
L
L1
Min. Typ. Max. Min.
Typ. Max.
A
A1 0.1
A2 1.25
1.75
0.25 0.004
0.049
0.069
0.010
b 0.28
C 0.17
0.48 0.011
0.23 0.007
0.019
0.009
D 4.80 4.90 5.00 0.189 0.193 0.197
E 5.80 6.00 6.20 0.228 0.236 0.244
E1 3.80 3.90 4.00 0.150 0.154 0.157
e h 0.25
1.27
0.50 0.010
0.050
0.020
L 0.40
L1 1.04
1.27 0.016
0.041
0.050
k ppp
0° 8°
0.10
0° 8°
0.004
Figure 11.
SO-8 footprint, dimensions in mm (inches)
6.8
(0.268)
4.2
(0.165)
0.6
(0.024)
1.27
(0.050)
7/9
Ordering Information TPI
Table 6.
Ordering information
Order code Marking
TPI8011N
TPI8011NRL
(1)
TPI12011N
TPI12011NRL
(1)
1.
Prefered device
TP80N
TP80N
TP120N
TP120N
Package
SO-8
Weight
0.08 g
Base qty
100
2500
100
2500
Delivery mode
Tube
Tape and reel
Tube
Tape and reel
Table 7.
Date
Document revision history
August-2001
02-Aug-2004
07-Nov-2007
Revision
3A
4
5
Changes
Last update.
V
BO
dyn. (page 2) and capacitances (page 3) values update.
Reformatted to current standards. Updated
Package information .
8/9
TPI
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