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ST Microelectronics - OVERVOLTAGE AND OVERCURRENT PROTECTION FOR TELECOM LINE

Numéro de référence LCP3121
Description OVERVOLTAGE AND OVERCURRENT PROTECTION FOR TELECOM LINE
Fabricant ST Microelectronics 
Logo ST Microelectronics 





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LCP3121 fiche technique
® LCP3121
Application Specific Discretes
A.S.D.
OVERVOLTAGE AND OVERCURRENT
PROTECTION FOR TELECOM LINE
FEATURES AND BENEFITS
s UNIDIRECTIONAL OVERVOLTAGE SUP-
PRESSOR PROGRAMMABLE BY VOLTAGE
AND CURRENT:
s PROGRAMMABLE BREAKDOWN VOLTAGE
UP TO 100 V.
s PROGRAMMABLE CURRENT LIMITATION
FROM 120 mA TO 600 mA.
s MULTI-LINE PROTECTION MODE : ONE DE-
VICE CAN PROTECT SEVERAL LINES.
)s HIGH SURGE CURRENT CAPABILITY :
t(sIPP = 100A for 10/1000 µs.
DESCRIPTION
ucDedicated to the protection of sensitive telecom
dequipment, the LCP3121 provides protection
rowhich can be programmed by both voltage and
Pcurrent.
teThe breakdown voltage can be easily programmed
by using an external zener diode.
leThe protection function programmed by the
ocurrent is achieved with the use of a resistor
bsbetween the gate and the cathode. The value of
the resistor will determine the level of the desired
Ocurrent before the triggering of the device.
) -A multiple protection mode is also performed when
t(susing several diodes providing each line interface
with an optimized protection level.
ucIf desired, a bidirectional protection function can
dbe achieved by the use of two LCP3121.
roCOMPLIES WITH THE FOLLOWING STANDARDS :
PCCITT K20 :
leteVDE 0433 :
soVDE 0878 :
ObFCC part 68 :
10/700µs
5/310µs
10/700µs
5/310µs
1.2/50µs
1/20µs
2/10µs
6kV
150A
2kV
50A
1.5kV
40A
2.5kV
SO-8
PIN-OUT CONFIGURATION
C1
8C
Gn 2
7A
Gp 3
6A
C4
5C
All cathod pins must be externally connected
FUNCTIONAL DIAGRAM
A
Gp
BELLCORE
2/10µs
200A (*)
Gn
TR-NWT-001089 : 2/10µs
2.5kV
2/10µs
200A (*)
BELLCORE
TR-NWT-000974 : 10/1000µs 1kV
10/1000µs 100A
(*) with series resistors or PTC.
C
TM: ASD is trademarks of STMicroelectronics.
April 2003 - Ed: 4
1/6

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