TD230 Datasheet, PDF (1/15 Pages) STMicroelectronics – ELECTRONIC CIRCUIT BREAKER

®
TD230
ELECTRONIC CIRCUIT BREAKER
. 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
. STEP-UPCONVERTER : VCC +13.5V OUTPUT
VOLTAGE
. ADJUSTABLE PROTECTION MODE
(CTRIP1/2)
. INHIBIT FUNCTION
. SHUTDOWN OUTPUT STATUS
. FEW EXTERNAL COMPONENTS
N
DIP16
(Plastic Package)
D
SO16
(Plastic Micropackage)
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.
ORDER CODES
Part Number
TD230I
Temperature
Range
-40^oC, +125^oC
PIN CONNECTIONS
Package
N
D
•
•
P Vcc
1
LBOOS T 2
CBOOST 3
OS CGND 4
P M1
5
GND
6
P M2
7
NVcc
8
16 REF1
15 GC1
14 S ENSP
13 INHIBIT
12 SHUTDOWN
11 _{SENS N}
10 GC2
9 REF2
October 1998