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PDF LCP1511D Data sheet ( Hoja de datos )
| Número de pieza | LCP1511D | |
| Descripción | PROGRAMMABLE TRANSIENT VOLTAGE SUPPRESSOR FOR SLIC PROTECTION | |
| Fabricantes | ST Microelectronics | |
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®
Application Specific Discretes
A.S.D.™
LCP1511D
PROGRAMMABLE TRANSIENT VOLTAGE
SUPPRESSOR FOR SLIC PROTECTION
FEATURES
DUAL PROGRAMMABLE TRANSIENT SUP-
PRESSOR.
WIDE NEGATIVE FIRING VOLTAGE RANGE :
VMGL = -80V max.
LOW DYNAMIC SWITCHING VOLTAGES :
VFP and VDGL.
LOW GATE TRIGGERING CURRENT :
IGT = 5mA max.
PEAK PULSE CURRENT :
IPP = 30A for 10/1000µs surge.
HOLDING CURRENT :
IH = 150mA.
DESCRIPTION
This device has been especially designed to pro-
tect subscriber line card interfaces (SLIC) against
transient overvoltages.
Positive overloads are clipped with 2 diodes.
Negative surges are suppressed by 2 thyristors,
their breakdown voltage being referenced to
-VBAT through the gate.
This component presents a very low gate trigge-
ring current (IGT) in order to reduce the current con-
sumption on printed circuit board during the firing
phase.
A particular attention has beengiven to the internal
wire bonding. The ”4-point” configuration ensures
reliable protection, eliminating the overvoltage in-
troduced by the parasitic inductances of the wiring
(Ldi/dt), especially for very fast transients.
COMPLIESWITHTHE FOLLOWINGSTANDARDS :
CCITT K20 :
10/700µs
5/310µs
VDE 0433 :
10/700µs
5/310µs
VDE 0878 :
1.2/50µs
1/20µs
I3124 :
0.5/700µs
0.2/310µs
FCC part 68 :
2/10µs
2/10µs
BELLCORE
TR-NWT-001089 : 2/10µs
2/10µs
(*) with series resistors or PTC.
1kV
25A
2kV
38A (*)
1.5kV
40A
1kV
25A
2.5kV
170A (*)
2.5kV
170A (*)
February 1998 Ed: 3
SO8
SCHEMATIC DIAGRAM
TIP 1
GATE 2
NC 3
RING 4
8 TIP
7 GND
6 GND
5 RING
TM: ASD is trademarks of SGS-THOMSON Microelectronics.
1/7
1 page  
FUNCTIONAL DESCRIPTION
LINE A
D1
LINE B
D2
P1
P2
LCP1511D
TIP
- VBAT
C
RING
LINE A PROTECTION :
– For positive surges versus GND, the diode D1
will conduct.
– For negative surges versus GND, the protection
device P1 will trigger at a voltage fixed by the
-VBAT reference.
LINE B PROTECTION :
– For surges on line B, the operating mode is the
same, D2 or P2 is activated.
It is recommended to add a capacitor (C=220nF)
close to the gate of the LCP, in order to speed up
the triggering.
Surge peak current versus overload duration.
ITS M(A)
10
9
8
7
6
5
4
3
2
1
0
1E-2
1E-1
t(s)
1E+0
1E+1
F=50H z
Tj initial=25°C
1E+2
1E+3
5/7
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet LCP1511D.PDF ] | |
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