CLP30-200B1(1999) Ver la hoja de datos (PDF) - STMicroelectronics

Número de pieza

componentes Descripción

fabricante

CLP30-200B1
(Rev.:1999)

OVERVOLTAGE & OVERCURRENT PROTECTION FOR TELECOM LINE

STMicroelectronics 

2.3 Ringing mode

Fig.4 : Switching by voltage during ringing mode.

ILG

TIP

R sense

TIPL

TIPS

1

1/2 CLP200M

Overcurrent

detector

2

OR

SW1

Overvoltage Overvoltage

V LG

detector

reference

(>200V)

GND

CLP30-200B1

ILG

A1

-200

1

3

2

1

VLG

+200

In ringing mode (Ring relay in position 2), the only

protection device involved is the CLP30-200B1.

In normal conditions, the CLP30-200B1 operates

in region 1 of A1 curve, and is idle.

If an overvoltage occurring between TIP (or RING)

and GND reaches the internal overvoltage

reference (+/- 200V), the CLP30-200B1 acts and

the line is short-circuited to GND. At this time the

operating point moves to region 2 for positive

surges (region 3 for negative surges). Once the

surge current disappears, the device returns to its

initial state (region 1).

For surges occurring between TIP and RING, the

CLP30-200B1 acts in the same way. This means

that the CLP30-200B1 ensures a tripolar

protection.

When used alone, the CLP30-200B1 acts at the

internal overvoltage reference level (+/- 200 V).

Furthermore, it is possible to adjust this threshold

level to a lower voltage by using up to 4 fixed

external voltage reference (VZ1 to VZ4) (see fig.5).

Fig.5 : Methode to adjust the reference voltage.

1

TIP

R sense

TIPL

Overcurrent

detector

TIPS

2

VZ1

OR

SW1

SW2

OR

Overvoltage

detector

Overvoltage

reference

(>200V)

Overvoltage

detector

Overvoltage

reference

(>200V)

GND

VZ2

VZ3

RING

Overcurrent

detector

RINGL

R sense

RINGS

VZ4

1

2

5/11

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