CLP30-200B1 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'CLP30-200B1' PDF : 11 Pages View PDF
CLP30-200B1
2
Technical information
Technical information
2.1
Introduction
The aim of this section is to show the behavior of our new telecom line protection device.
Figure 13. Suscriber line protection topology
Telecommunication
line
"PRIMARY PROTECTION"
MDF
"SECONDARY PROTECTION"
CLP30-
200B1
VOLTAGE
REFERENCE
SLIC
LINE CARD
EXCHANGE
Figure 13. is a simplified block diagram of a subscriber line protection that is mainly used so
far. This shows two different things:
■ A “primary protection” located on the Main Distribution Frame (MDF) eliminates coarsely
the high energy environmental disturbances (lightning transients and AC power mains
disturbances) for which the ITU-T-K20 requires a 4 kV 10/700 µs test. This can be
assumed either by gas-tubes or silicon protection such as the TLPxxM.
■ A “secondary protection” located on the line card eliminates finely the remaining
transients that have not been totally suppressed by the first stage. The ITU-T-K20
requires a 1 kV 10/700 µs test. At this stage, the protection is managed by the CLP30-
200B1.
The explanations which follow are basically covering the line card application.
2.2
2.2.1
STMicroelectronics CLP30-200B1 concept
Evolution of the SLIC protection
Over the years, the performances of the SLICs considerably increased and therefore the
need of the protection has also evolved.
The CLP30-200B1 is especially designed for the protection of this new generation of SLIC.
For this, it is based on both overvoltage and overcurrent protection modes.
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