CLP30-200B1 查看數據表（PDF） - STMicroelectronics

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CLP30-200B1

ASD (Application Specific Devices) Overvoltage and overcurrent protection for telecom line

STMicroelectronics 

Technical information

CLP30-200B1

2.2.2

Figure 14. Line card protection

I

Programmable thanks to

any external voltage reference

- VSWON

+ ISWON

Programmable thanks to

an external resistor

V

+ VSWON

- ISWON

Line Card operating conditions

Figure 14. summarises the performance of the CLP30-200B1 which basically holds the

SLIC inside its correct voltage and current values.

Application circuit

Figure 15. CLP30-200B1 in line card

PTC

TIP

RS

GND

RING

PTC

RS

I

RSENSE

TIPL

TIPS

Overcurrent

detector

OR

SW1

Overvoltage

detector

Overvoltage

reference

(> 200 V)

SW2

OR

Overvoltage

detector

Overvoltage

reference

(> 200 V)

Overcurrent

detector

RINGL

RSENSE

RINGS

1

2

1

2

Ring

Generator

- VBAT

Rp

TIP

- VBAT

External

voltage

reference

SLIC

Rp

RING

The Figure 15. above shows the topology of a protected analog subscriber line at the line

card side.

■ A first stage based on CLP30-200B1 manages the high power issued from the external

surges. When used in ringing mode, the CLP30-200B1 operates in voltage mode and

provides a symmetrical and bidirectional overvoltage protection above 200 V on both TIP

and RING lines. When used in speech mode, the CLP30-200B1 operates in current mode

and the activation current of the CLP30-200B1 is adjusted by RSENSE.

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