CLP30-200B1

Technical information

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2

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

Figure 13. is a simplified block diagram of a subscriber line protection that is mainly used so

far. This shows two different things:

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.

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

STMicroelectronics CLP30-200B1 concept

2.2.1

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.

Telecommunication

"PRIMARY PROTECTION"

MDF

LINE CARD

EXCHANGE

line

SLIC

"SECONDARY PROTECTION"

CLP30-

200B1

VOLTAGE

REFERENCE