TISP4070L3BJR Просмотр технического описания (PDF) - Power Innovations Ltd

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Компоненты Описание

производитель

TISP4070L3BJR

BIDIRECTIONAL THYRISTOR OVERVOLTAGE PROTECTORS

Power Innovations Ltd 

TISP4070L3BJ, TISP4350L3BJ

BIDIRECTIONAL THYRISTOR OVERVOLTAGE PROTECTORS

AUGUST 1999 — REVISED NOVEMBER 1999

power cross pass routes

This discussion covers typical modem flows.

AN

Y

B

FLOW

No tests

box A

COMMENT

The criterion for box A is if the modem connects to an outside TNV

line.

The majority of modems will be connected to an outside line, so the

answer is yes. The yes path goes to box B.

A

Y

BN

E

Y

C

box B

The criterion for box B is if the equipment has a limit of ≤ 100 A2s at

600 V rms for Test 1. Many interpret this as a fuse with I2t ≤ 100 A2s

and often miss the 600 V a.c. breaking requirement. However, the

current loop is completed by the fuse and other equipment

components. To ensure that the fuse I2t sets the equipment

performance, the other current loop components, such as the printed

wiring (PW), must have a higher I2t values than the fuse. Certainly the

fuse I2t needs to be lower than 100 A2s but other components, for

example IC packaging, may impose a hazard-free limit of 10 A2s. (This

conflicts with FCC Part 68 Type A surge pass requirement of 8 A2s.)

A yes leads to box C and a no to box E.

EN

Y

F

IN

Y

Fail

boxes E and I

The criterion for box E is for a minimum telecommunications line cord

of No. 26 AWG to be supplied or specified.

A yes leads to box F and a no to box I.

The criterion for box I is to pass Test 1.

If all the four pass criteria of Test 1 are met, this is a yes and the flow

goes to box F.

A no result fails the equipment.

PRODUCT INFORMATION

7

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