TD230

ELECTRONIC CIRCUIT BREAKER

October 1998

®

.

TWO N-CHANNEL MOSFETs CONTROL AND

DUAL INDEPENDANT CURRENT SUPERVI-

SION FOR OVER CURRENT PROTECTION

.

DUAL SUPPLY OPERATION

.

FROM +3/-5 TO +18/-18V OPERATING VOLT-

AGE

.

VOLTAGE

.

ADJ U ST ABLE

PR OT EC TI ON

M OD E

(CTRIP1/2)

.

INHIBIT FUNCTION

.

SHUTDOWN OUTPUT STATUS

.

FEW EXTERNAL COMPONENTS

DESCRIPTION

The TD230 is designed to control two N-channel

MOSFETs used as power switches in circuit break-

ing applications.

Its current supervision and immediate action on the

switches ensure high security for the boards and

the supplies thus protected against short-circuit or

over current.

In case of short-circuit or over current detection, the

TD230 immediately switches off the corresponding

MOSFET, thus disconnecting the board from the

supply. After several automatic restart attempts, a

definitive shutdown of the circuit is done if the

shortcircuit or over current persists over an exter-

nally adjustable time, until the TD230 is reset by

temporary INHIBIT signal or temporary switching

off of the power supply (hot disconnection/recon-

nection).

If the board is disconnected from the positive sup-

ply by the TD230 it will automatically be disjoncted

from the negative supply too.

TD230 integrates an induction step-up converter

that provides 13.5V above the positive rail to drive

the high side MOSFET.

1

2

3

4

5

6

7

9

10

11

12

13

14

8

15

16

PVcc

LBOOS T

CBO OST

PM1

GND

PM2

OS CGND

NVcc

REF1

GC1

S ENSP

INHIBIT

SHUTDOWN

SENS N

GC2

REF2

PIN CONNECTIONS

ORDER CODES

Part Number

Temperature

Range

Package

ND

TD230I

-40

••

N

DIP16

(Plastic Package)

D

SO16

(Plastic Micropackage)