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PDF TD230 Data sheet ( Hoja de datos )

Número de pieza TD230
Descripción ELECTRONIC CIRCUIT BREAKER
Fabricantes ST Microelectronics 
Logotipo ST Microelectronics Logotipo



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No Preview Available ! TD230 Hoja de datos, Descripción, Manual

® 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
-40oC, +125oC
PIN CONNECTIONS
Package
ND
••
P Vcc
1
LBOOS T 2
CBOOST 3
OS CGND 4
P M1
5
GND
6
P M2
NVcc
7
8
16 REF1
15 GC1
14 S ENSP
13 INHIBIT
12 SHUTDOWN
11 SENS N
10 GC2
9 REF2
October 1998

1 page




TD230 pdf
TIMING DIAGRAMS
E vents
Sta tus
Norma l
Curre nt
Norma l
F u n ction
PVc c- Vre f
(=Vrs)
S hort Circuit
C u rre n t
Limitation
Norma l
Curre nt
Norma l
F u n ction
P owe r
Short Circuit
Curre nt
Limitation
OFF
ON
Circuit
OFF
Vi
Inhibit
Norma l
Curre nt
Norma l
F u nc tion
HI
LO
OFF
Norma l
Curre nt
Norma l
Func tion
S e ns P
P Vc c -ε
GC1-S e ns P
= Vgs
13.4V
~5 V
P M1=Vctrip1
PVc c
Vs p3
S hutdown
H iZ
Inhibit
TTL
ts s # PVc c. Css
Ip1
tpm1 # (Ctrip1.Vsp3)
IP 2-IP 3
ts
tp
TD230
PVcc -Vref
(=Vrs)
Vi
G C1 -Se ns P
= Vgs
1 3. 4V
~5 V
PVcc -Vref
(=Vrs)
t < ti
Vi
G C1 -Se ns P
= Vgs
1 3 .4V
~5 V
ti tre toff # Ro n.Cs s
5/15

5 Page





TD230 arduino
Figure 9A : PCB (not to scale)
Figure 9B : Silkscreen
TD230
Figure 9C : Schematic
eventual control block, or, if it should not be used,
tied to the GND pin.
4. Th e SHUTDOWN pin is an open drain
CMOS/TTL compatible output which should be tied
to the TTL compatible input of an eventual control
block.
The absolute maximum rating of this output is 7V.
In the case of a visual alarm, a LED is likely to be
tied to the positive power supply which can be
destructive for the Shutdown output if the power
supply is over 7V. An easy way to eliminate this is
to add a 6V zener diode between the Shutdown
output and the Ground as shown on figure 10.
5. The time constant of the protection mode (given
by the charge of CTRIP1/2 capacitors) must be
greater than the time constant of the restart at-
tempts (given by the charge of the CSS 1/2 soft start
capacitors). This condition can be described as
follows :
VSP1/2 x CTRIP1/2 / IP/N2 > VTH1/2 x
(CSS1/2+CISS1/2) / IP/N1
11/15

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