SGS Thomson Microelectronics TD230 Datasheet



ELECTRONIC CIRCUITBREAKER

.TWON-CHANNEL MOSFETs CONTROL AND

DUAL INDEPENDANT CURRENT SUPERVISION FOR OVER CURRENT PROTECTION

.DUALSUPPLYOPERATION

.FROM+3/-5TO+18/-18VOPERATINGVOLT-

AGE

.STEP-UPCONVERTER: V

VOLTAGE

+13.5VOUTPUT

CC

.ADJUSTABLE PROTECTION MODE

(CTRIP1/2)

.INHIBIT FUNCTION

.SHUTDOWNOUTPUT STATUS

.FEWEXTERNAL COMPONENTS

N

DIP16

(Plastic Package)

ORDERCODES

TD230

D

SO16

(Plastic Micropackage)

DESCRIPTION

The TD230 is designed to control two N-channel MOSFETsused as powerswitches incircuitbreaking applications.

Its currentsupervisionandimmediateactiononthe switches ensure high security for the boards and the suppliesthus protectedagainstshort-circuit or over current.

Incaseofshort-circuitorovercurrentdetection,the TD230immediatelyswitchesoffthe corresponding MOSFET, thus disconnecting the board from the supply.Afterseveral automaticrestart attempts,a definitive shutdown of the circuit is done if the shortcircuit or over current persists over an externally adjustable time, until the TD230 is reset by temporary INHIBIT signal or temporary switching off of the power supply (hot disconnection/reconnection).

If the board is disconnectedfromthepositivesupply bytheTD230itwillautomaticallybe disjoncted from the negativesupply too.

TD230 integrates an induction step-up converter that provides13.5Vabove the positiverail to drive the high side MOSFET.

Part Number

TD230I -40

PIN CONNECTIONS

PVcc

LBOOS T

CBOOST OSC GND

PM1

GND

PM2

NVcc

Temperature

1

2

3

4

5

6

7 8

Package

Range

o

C, +125oC ••

ND

REF1

16

15

GC1

SENSP

14

13

INHIBIT

12

SHUTDOWN

11

SENSN GC2

10

9

REF2

October 1998

TD230

BLOCK DIAGRAM

OS CGND

INHIBIT

S HUTDOWN

GND

PM2

PVcc

STEP-UP

osc

VSP1

PM1

PVcc

IP2

VSP2

VSP3

VSN3

PVcc

IP3

IN3

IN2

VSN2

LBOOST

CBOOS T

REF1

IP1

GC1

SW1

SE NSP

S ENSN

PVcc

IN1

GC2

SW2

VSN1

REF2

NVcc

ABSOLUTE MAXIMUMRATINGS

Symbol Parameter Value Unit

+

V

CC

V

CC

Positive Supply Voltage +22 V

-

Negative Supply Voltage -22 V

Inhibit Input Voltage 7 V Shutdown Input Voltage 7 V PM1/PM2 Input Voltage 7 V

T

amb

T

stg

Operating Junction Temperature -40to 150

j

Operating Ambient Temperature -40to 125 Storage Temperature Range -65to 150

OPERATINGCONDITIONS

Symbol Parameter Value Unit

V

CC

Supply Voltage +/-18 V

o

C

o

C

o

C

INSTRUCTIONS FOR USE

Symbol Parameter Value Unit

Bypass Capacitor(each supply) 1 µF

2/15

C

bypass

TD230

ELECTRICAL CHARACTERISTICS

= +/-5V, T

V

CC

Symbol Parameter Min. Typ. Max. Unit

SUPPLY

+

V

CC

V

I

CC

Positive Supply Voltage 2.7 18 V

-

Negative Supply Voltage -18 -4.5 V

CC

+

Positive Supply Current Charge Pump Inactivated 1.8 3 mA Charge Pump Activated

-

I

CC

Negative Supply Current Charge Pump Activated/Inactivated

LOGIC INPUT (INHIBIT)

V

High Input Voltage 2 6 V

IH

Low Input Voltage 0 0.8 V

IL

tp Propagation Delay GC1/2 (without load) 0.5 2 µs

LOGIC OUTPUT (SHUTDOWN-open drain)

V

I

OH

Low Output Voltage (2mA) 0.8 V

OL

High Output Current (6V) 1 nA Shutdown Response Time

t

s

(sens P/N shutdown without load) 8 15

STEP-UP CONVERTER

V

boost

t

vboost

V

Step-Up Output Voltage V Rise Time for V Output Ripple Voltge 0.15 0.6 V

rip

INPUT COMPARATORS

V t

Threshold (PVCC- Ref1, NVCC-Ref2) 56 63 71 mV

i

Response Time (GC1/2 - without load) 2 3 µs

re

Inhibition Time (without load) 300 ns

t

i

VOLTAGESOURCES

VSP2 VSN2

VSP3 VSN3

Threshold Sense Pos/Neg 0.7 V

Threshold Protection Mode 1.10 1.20 1.30

CURRENT SOURCES

IP1, IN1 Soft Start Current Sources 10 15 20 µA IP2, IN2 Protection Mode Current Sources (loading Ctrip 1/2) 3 4 5 µA IP3, IN3 Protection Mode Current Sources (discharging C

SWITCHES

R

On-Resistance of the switches

on

amb

=25oC, L

=220µH, C

boost

= 100nF (unless otherwise specified)

boost

2.3 4 mA

L

boost

= 220µH, C

boost

= 100nF

-0.7 -1.5 mA

+

+10 V

CC

(10 to 90%) 250 800 µs

boost

CC+/-

) 0.6 1 1.4 µA

trip 1/2

+

CC

0.75 V

+13.4 V

CC+/-

CC

0.8 V

+

SW1/SW2 90 200

+15 V

CC+/-

µs

V

Ω

3/15

TD230

Figure 1 : DUAL ELECTRONIC CIRCUITBREAKER APPLICATION

RS1

Vcc+

REF1

GC1

SENS P

INHIBIT

SHUTDOWN

SE NS N

GC2

REF2

16

15

14

13

12

11

10

9

GND

Vcc-

LBOOST

CBOOST

CTRIP1

CTRIP2

PVcc

1

LBOO ST

2

3

CBOOST

OSCGND

4

PM1

5

GND

6

PM2

7

NVcc

8

CSS1

CONTROL

CSS2

NMos

to BOARD

from BOARD

NMOS

RS2

Figure 2 : SINGLEELECTRONICCIRCUIT BREAKERAPPLICATION

RS1

Vcc+

REF1

GC1

SENSP

INHIBIT

SHUTDOWN

SENSN

GC2

REF2

16

15

14

13

12

11

10

9

GND

LBOOST

CBOOST

CTRIP1

PVcc

1

2

3

LBOOST

CBOOST

OSCGND

4

PM1

5

GND

6

PM2

7

NVcc

8

CSS1

CONTROL

NMos

to BOARD

4/15

TIMING DIAGRAMS

TD230

Events

Sta tus

PVc c-Vre f (=Vrs)

Vi

SensP

ε

PVcc-

GC1-S ens P =Vgs

13.4V

~5V

PM1=Vctrip1

PVcc Vsp3

Norma l

Norma l Curre nt

Curre nt

Norma l

Fun ction

Short Circuit

Curre nt

Limitation

Norma l

Norma l Curre nt

Curre nt

Norma l

Fun ction

Sho rt Circuit

Curre nt

Limitation

Circuit

OFF

Powe r

OFF

ON

Norma l

Curre nt

Norma l

Func tion

ts s # PVc c.Css

Ip1

Inhibit

OFF

HI LO

Norma l Current

Norma l

Func tion

S hutdown

PVcc-Vref (=Vrs)

Vi

GC1 -Se nsP = Vgs

13.4V

~5V

HiZ

Inhibit

TTL

tpm1 # (Ctrip1.Vsp3)

IP2-IP3

PVcc-Vref (=Vrs)

Vi

GC1 -Se ns P = Vgs

13.4V

~5V

ts

tp

t < ti ti tre toff# Ron.Css

5/15