Rev 3

February 2006

1/11

11

LCDP1521

Dual line programmable transient voltage suppressor for

SLIC protection

Features

suppressor

Description

This device has been especially designed to

protect 2 new high voltage, as well as classical

SLICs, against transient overvoltages.

Positive overvoltages are clamped by 2 diodes.

Negative surges are suppressed by 2 thyristors,

through the gate.

This component presents a very low gate

current consumption on printed circuit board

during the firing phase.

Benefits

Trisils are not subject to ageing and provide a fail

safe mode in short circuit for a better protection.

Trisils are used to help equipment to meet various

standards such as UL1950, IEC950 / CSA C22.2,

UL1459 and FCC part68. Trisils have UL94 V0

resin approved (Trisils are UL497B approved (file:

E136224)).

Functional diagram

SO-8

TIP 1

RING 1

TIP 2

RING 2

GATE

GATE

GND

GND

1

2

3

4

8

7

6

5

www.st.com