TPP25011 Datasheet, PDF (1/7 Pages) STMicroelectronics – OVERVOLTAGE and OVERCURRENT PROTECTION for TELECOM LINE

Application Specific Discretes
A.S.D.™
TPP25011
OVERVOLTAGE and OVERCURRENT
PROTECTION for TELECOM LINE
FEATURES
UNIDIRECTIONAL FUNCTION
PROGRAMMABLE BREAKDOWN VOLTAGE
UP TO 250 V
PROGRAMMABLE CURRENT LIMITATION
FROM 40 mA TO 500 mA
SURGE CURRENT CAPABILITY
I_PP = 30A 10/1000 µs
DESCRIPTION
Dedicated to sensitive telecom equipment
protection, this device can provide both voltage
and current triggered protection with a very tight
tolerance.
The breakdown voltage can be easily programmed
by using an external zener diode.
A multiple protection mode can be also performed
when using several zener diodes, providing to
each line interface an optimized protection level.
The current limiting function is achieved with the
use of a resistorbetween the gate and the cathode.
The value of the resistor will determine the level of
the desired current.
SO8
SCHEMATIC DIAGRAM
COMPLIESWITHTHE FOLLOWINGSTANDARDS :
CCITT K17 :
10/700 µs
5/310 µs
VDE 0433 :
10/700 µs
5/310 µs
CNET :
0.5/700 µs
0.2/310 µs
FCC part 68 :
2/10 µs
2/10 µs
BELLCORE
TR-NWT-000974 :
10/1000 µs
10/1000 µs
(*) with series resistors or PTC.
1.5 kV
38 A
2k V
40 A (*)
1.5 kV
38 A
2.5 kV
75 A (*)
1 kV
30 A (*)
TM: ASD is trademarks of SGS-THOMSON Microelectronics.
February 1998 - Ed: 4
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