LCP3121 Datasheet, PDF (1/6 Pages) STMicroelectronics – OVERVOLTAGE AND OVERCURRENT PROTECTION FOR TELECOM LINE

®
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 :
I_PP = 100A for 10/1000 µs.
DESCRIPTION
Dedicated to the protection of sensitive telecom
equipment, the LCP3121 provides protection
which can be programmed by both voltage and
current.
The breakdown voltage can be easily programmed
by using an external zener diode.
The protection function programmed by the
current is achieved with the use of a resistor
between the gate and the cathode. The value of
the resistor will determine the level of the desired
current before the triggering of the device.
A multiple protection mode is also performed when
using several diodes providing each line interface
with an optimized protection level.
If desired, a bidirectional protection function can
be achieved by the use of two LCP3121.
SO-8
PIN-OUT CONFIGURATION
C1
8C
Gn ₂
7A
Gp ₃
6A
C4
5C
All cathod pins must be externally connected
COMPLIES WITH THE FOLLOWING STANDARDS :
CCITT K20 :
VDE 0433 :
VDE 0878 :
FCC part 68 :
BELLCORE
TR-NWT-001089 :
BELLCORE
TR-NWT-000974 :
10/700µs
5/310µs
10/700µs
5/310µs
1.2/50µs
1/20µs
2/10µs
2/10µs
2/10µs
2/10µs
10/1000µs
10/1000µs
(*) with series resistors or PTC.
6kV
150A
2kV
50A
1.5kV
40A
2.5kV
200A (*)
2.5kV
200A (*)
1kV
100A
TM: ASD is trademarks of STMicroelectronics.
April 2003 - Ed: 4
FUNCTIONAL DIAGRAM
A
Gn
C
Gp
1/6