Datasheet L9305A Datasheet (SGS Thomson Microelectronics)

DUALHIGH CURRENT RELAYDRIVER

.HIGH OUTPUT CURRENT

.HYSTERESIS INPUT COMPARATOR WITH

WIDERANGE COMMON MODE OPERATION
ANDGROUNDCOMPATIBLEINPUTS

.INPUTCOMPARATORHYSTERESIS

.INTERNAL THERMAL PROTECTION WITH

HYSTERESIS

.INTERNALOUTPUTOVERVOLTAGECLAMP-

ING

.SINGLESUPPLYVOLTAGE(3.5Vup to18V)

L9305A

Powerdip(8 + 8)

ORDERING NUMBER : L9305A

DESCRIPTION

TheL9305Aisa monolithicinterfacecircuit withdif­ferentialinput comparatorandopencollectoroutput
ableto sink highcurrentspecifically todrive relays,
lamps,d.c. motors.

Particularcarehasbeen takento protectthedevice
againstdestructivefailures - shortcircuit ofoutputs

, outputovervoltages,supplyovervoltage.

toV

S

BLOCK DIAG RAM

A built inthermalshut-downswitchesoff thedevice
whentheIC’sinternaldissipationbecomestoogreat
and the chip temperature exceeds a set security
threshold.

A hysteresisinputcomparatorincreasestheinterfa­ce’snoiseimmunity, allowingthecorrectusealsoin
criticalenvironmentsasautomotiveor industrialap­plications.

January1992

This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

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L9305A

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

5

V

7

I

ZS

V

I

V

I

T

j,Tstg

P

tot

I

o

(*) The maximum allowed supply voltage without series resistors is limited by the built-in zener protection diodes

≤ 2.5 ms ; repetition time ≥ 30 m s.

(**) T

on

PIN CO NNECT IO N (top view)

Supply Voltage (*) 20 V
Driver Supply Voltage 26 V
Supply Zener Clamp Current (DC)

(PULSED) (**)

30

80
Comparator Input Voltage Range – 0.2 to 24 V
Differential Input Voltage 24 V
Junction and Storage Temperature – 55 to 150 °C
Power Dissipation at T

=85°C 928 mW

amb

Output Current Int. limited

mA
mA

THERMALDATA

Symbol Parameter Value Unit

Thermal Resistance Junction to pins Max. 15 °C/W
Thermal Resistance Junction to Ambient Max. 70 °C/W

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R

th j-pins

R

th j-amb

L9305A

ELECTRICAL CHARACTERISTICS (V5= 14.4V, T

=25°C ; refer to block diagramunless otherwise

amb

specified)

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

”st.by” Supply Current V

I

S

I

SON

V

V

V

I

I

OS

CMR Input Common Mode Range V

I

SC

I

CD

V

CSAT

I

OL

*TON≤ 2.5 ms ; repetition time ≥ 30 ms.
** The maximum allowed supply voltage without limiting resistors is limited by the built-in protection zener diodes see V

Spec. velues.

Supply Voltage 3.5 18* V

5

Supply Current V
Output Clamping Voltage (for

CZ

+

–

–V

≥70mV 5 8 mA

I

–

+

–V

> 70mV 18 30 mA

I

=1A 20 27 V

I

OUT

I
I

each channel)
Supply Voltage Clamp IZS= 10mA 20 27 V

ZS

Comparator Hysteresis V

IH

+

–

–V

I

=200mVpp

I

20 70 mV

f = 1kHz

Input Bias Current V+=V–= 0V 0.2 1 µA

B

Input Offset Current V+=V–=0V ±20 ± 200 nA

= 3.5V to 18V 0 V5–1.6 V

5

–

Output Short Circuit Current for
Each Channel

Driver Transistor Current
Capability

On Status Saturation Voltage V

Output Leakage Current V

V

V

I

CD

I

COUT

–V

I

–

–V

I

–

–V

I

= 100mA

= 1.2A

+

–V

I

+

≥70mV V

I

+

≥70mV DC

I

out

V

out

= 16.5V

=6V

Pulsed (**)

+

≥70mV

I

–

≥70mV 250 µA

I

0.85 A

2.5 A
300 mA
600 mA

1V

CZ,VZS

TEST AND APPLI CAT I ON CIRCUI T

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L9305A

APPLI CATI O N INF O RMATI ONS (refer to application circuit)

D1 andD2 diodes arerequiredonly for reversepo­larityprotection.

If V

maybehigherthanVZSaresistorRSisneces-

S

sary to limitthe zener current I
mineR

1) <I

2) V
wherefromT

-V

valuethefollowingequationscanbeused:

S

V

S MAX–VD1–VZS min

R

S

S min–VD1–RS–ISON MAX>VST min

=25°C:

amb

SMAX

andV

arethemaximum and minimum

Smin

. Inorder to deter-

ZS

ZS MAX

valuesof power supplyvoltage

isthe forwarddiodeD1 voltagedrop

-V

D1

-V

-I

=20V

ZS min

=30 mAford.c.modeandI

ZS MAX

ZS MAX

=80mA

for pulsedmode (see Absolutemaximumratings)

-I

SOM MAX

-V

ST min

If no R
powerfullexternalzener D

=30mA

= 3.5 V

value can satisfy thesystem 1),2) a more

S

=18 Vis required.

Z

Then 1) becomes:

whereI
V

DZ MAX

voltagecannot be higher than 20 V otherwise

A

output overvoltage protection may be activated.
Morever V

A

protectionis required.

=22 to 24 V isa mandatoryforoutput 7protec-

D

Z2

tionif V

maybe higherthan26 V.

S

MOUNTINGINSTRUCTION

TheL9305Aisassembledina newplasticpackage,
thePowerdip,in which 8 pins (from 9 to 16) areat­tachedtotheframeandremoverthe heatproduced
by the chip.

Figure2and 3showtwo ways ofheatsinking.Inthe
first case, a PC board copper area is used as a
heatsinkI = 65 mm.While in the secondcase, the
device is solderedto an externalheatsink. In both
examples,the thermalresistancejunction-ambient
is35 °C/W.

V

S MAX–VD1

–18

R

S

<I

DZ MAX

isthe maximumallowedDZcurrent.

must be less than 16 V if short circuit

Figure2 : Exampleof HeatsinkUsingPC Board

Copper(I =65 mm).

Figure 3 : Exampleof an ExternalHeatsink.

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POWERDIP16PACKAGE MECHANICAL DATA

L9305A

DIM.

MIN. TYP. MAX. MIN. TYP. MAX.

a1 0.51 0.020

B 0.85 1.40 0.033 0.055

b 0.50 0.020

b1 0.38 0.50 0.015 0.020

D 20.0 0.787
E 8.80 0.346

e 2.54 0.100

e3 17.78 0.700

F 7.10 0.280

I 5.10 0.201
L 3.30 0.130
Z 1.27 0.050

mm inch

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L9305A

Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for
the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its
use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifica­tions mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information pre­viously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or
systems without express written approval of SGS-THOMSON Microelectronics.

 1994 SGS-THOMSON Microelectronics - All Rights Reserved

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