LCP150S View Datasheet(PDF) - STMicroelectronics

Part Name

Description

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LCP150S

PROGRAMMABLE TRANSIENT VOLTAGE SUPPRESSOR FOR SLIC PROTECTION

STMicroelectronics 

APPLICATION CIRCUIT

Typical SLIC Protection Concept.

RING GENERATOR

LCP150S

LINE A

T

E

S

T

R

E

L

A

Y

S

LINE B

PTC

RING

RELAY

PTC THBT200S

- VBAT

LCP150S

SLIC

220

nF

FUNCTIONAL DESCRIPTION

LINE A PROTECTION:

- For positive surges versus GND, the diode D1

will conduct.

- For negative surges versus GND, the protec-

tion device P1 will trigger at a voltage fixed by

the -VBAT reference.

LINE B PROTECTION:

- For surges on Line B, the operating mode is the

same , D2 or P2 is activated.

A capacitor (C = 220nF) can be added close to

the gate of the LCP15xx, in order to speed up

the triggering.

5/6

®

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