Datasheet L9308 Datasheet (SGS Thomson Microelectronics)

.DARLINGTONOUTPUTSTAGE

.INPUT COMPARATOR WITH WIDE RANGE

COMMONMODE OPERATIONANDGROUND
COMPATIBLEINPUTS

.INPUTCOMPARATORHYSTERESIS

.SHORT CIRCUIT PROTECTION OF OUTPUT

WITHSOAPROTECTION

.INTERNAL THERMAL PROTECTION WITH

HYSTERESIS

.SINGLESUPPLYVOLTAGEFROM3.5VUPTO

28V

DESCRIPTION

The L9308 is a monolithicinterface circuitwith dif­ferentialinput comparatorandopencollectoroutput
able to sink current specifically to drive lamps, re­lays,d.c. motors,electrovalvesetc.

Particularcarehas beentakentoprotectthedevice
againstdestructive failures- short circuit of outputs

, SOAprotection,supplyovervoltage.

to V

S

L9308

DUAL LOW SIDE DRIVER

MINIDIP

ORDERING NUMBER : L9308

A builtin thermalshut-downswitchesoffthedevice
whentheIC’sinternaldissipationbecomestoo high
and the chip temperature exceeds the security
threshold.

Theinputcomparatorhysteresisincreasestheinter­face’s noise immunity allowing the correct use in
criticalenvironmentsas automotiveapplications.

BLOCK DIAGRAM

October1990

Thisis advanced informationon a new product now in development or undergoing evaluation. Details aresubject to change withoutnotice.

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L9308

PIN CONNECTION (Top view)

ABSOLUTE MAXIMUM RATINGS

1) -IN2 Inverting input2

2) +IN2 Non-inverting input2

3) OUT2 Output2

4) GND Ground

5) OUT1 Output1

6) V

7) +IN1 Non-inverting input1

8) -IN1 Inverting input1

Supply

ST

Symbol Parameter Value Unit

Current Into Supply Tamb = 25°C, DC

I

ZS

Clamp Zener Diode Pulsed (*)
Supply Voltage 28 V(**)

V

S

Output Current Internally Limited

I

O

T

j,Tstg

(*) TON ≤ 2.5ms ; repetition time >30ms.
(**)Themaximum allowed supply voltage withoutlimitingresistor is limitedby thebuilt-in protectionzener diode : see V

values.If V

Junction and Storage Temperature – 55 to +150 °C
Power Dissipation at T

P

tot

ishigherthan VZSa resistorRSisnecessary to limit the zener currentIZS.

S

=85°C 650 mW

amb

30
80

ZS

spec.

THERMALDATA

Symbol Parameter Value Unit

R

th j-amb

Thermal Resistance Junction-ambient Max 100 °C/W

mA
mA

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L9308

ELECTRICALCHARACTERISTICS(Vs=14.4V;–40°C≤ T

, ≤85° C;RS=100Ω unlessotherwisenoted)

amb

Symbol Parameter Test Conditions Min. Typ. Max. Unit

Hysteresis of the Input

V

IH

Comparater
Input Bias Current V

I

B

Input Offset Current V

I

OS

CMR Input Common Mode Range V

Output Short Circuit Current for

I

SC

Each Channel
(see fig. 4)

V

I

I

V

I

V

Omin

On Status Saturation Voltage T

CSAT

Output Leakage Current V

I

OL

Supply voltage (pin 6) 3.5 18 V

ST

Supply Current V

”st.by”

Supply Current V

”ON”

Voltage Clamp Supply Protection IZS= 10mA 20 27 V

ZS

Minimum Output Current wiyth

VIN= 200mVpp ;

20 80 mV

f = 1kHz

+

–

=V

= 0 0.2 1.0 µA

I

I

+

–

=V

=0 ±50 ± 400 nA

I

I

= 6 – 18V

s

T

amb

=25°C

0V

VIN–VIN> 70mV

= 16V

V

S

=25°Cto85°C

T

amb

=–40°Cto25°C

T

amb

V

OUT 1, 2
amb

V

I

I

OUT 1, 2

T

amb
I

V

S

V

S

I
I

V

CSAT

=6V

=–40°Cto25°C

–

+

–V

> 70mV

I

= 300mA

1.0

=25°Cto85°C

–

–

–V

> 70mV

I

= 18V

10 300

=5V

+

–

V

> 70mV 5 8 mA

I

–

+

V

> 70mV 18 mA

I

= 1.5V 400 mA

–1.6 V

ST

0.6

0.7

1.2

1.5

1.4

20

the Outputs connected Together
Rise Time (see fig. 2)

t

r

t

Fall Time

f

don
doff

Delay Time on
Delay Time off

t
t

I

OUT

T
I

OUT

T

amb

amb

= 50mA

=25°C

= 50mA

=25°C

2
2

10
10

A
A
A

V
V

µA
µA

µs

µs

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L9308

Figure 1 : Switching Time TestCircuit. Figure 2 : SwitchingTime Waveforms for Resis-

tive Loads.

Figure 3 : Typical Applicationand TestCircuit.

Notes: a) R

b) C

4/7

S requiredonly to limit ΙZS

cut highfrequency gainduring current limiting.

1,C2

wheneverVSexceeds VZSvoltagevalue.

Figure 4 : Typical SOACharacteristic.

L9308

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L9308

MINIDIP PACKAGE MECHANICAL DATA

DIM.

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

A 3.32 0.131

a1 0.51 0.020

B 1.15 1.65 0.045 0.065

b 0.356 0.55 0.014 0.022

b1 0.204 0.304 0.008 0.012

D 10.92 0.430
E 7.95 9.75 0.313 0.384

e 2.54 0.100
e3 7.62 0.300
e4 7.62 0.300

F 6.6 0.260

I 5.08 0.200

L 3.18 3.81 0.125 0.150

Z 1.52 0.060

mm inch

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L9308

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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