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

L9351

October 1992

HIGH SIDE DRIVER

ADVANCE DAT A

.

LOW SATURATION VOLTAGE

.

TTL COMPATIBLE INPUT

.

WIDE SUPPLY VOLTAGE

.

VERY LOW QUIESCENT CURRENT

(30mA max)

.

NO EXTERNAL COMPONENTS

.

INTERNAL

RECIRCULATION

PATH

FOR

FAST DECAY OF INDUCTIVE LOAD CUR-

RENT

.

SHORT CIRCUIT PROTECTION

.

FAILSAFE OPERATION : OUTPUT IS OFF IF

THE LOGIC INPUT IS LEFT OPEN

DESCRIPTION

The L9351 is a monolithic integrated circuit desi-

gned to drive grounded resistive, inductive or mixed

loads from the power supply positive side. Very low

standby current (30mA max.) and internally imple-

mented protections against load dump and reverse

voltages make the device very useful in automotive

applications. No external components are required

because the output recirculation clamping zener is

included in the chip. This zener can withstand a re-

circulation peak current of 550mA on a 80mH/25

Ω

load.

The device is self-protected against overtempera-

ture, overvoltage and overcurrent conditions. The

L9351 operates over the full battery voltage range,

from 4.5V (cold cranking) up to 24V (jump starting).

The L9351 withstands revers battery conditions (-

13V) and supply voltage transients up to 80V limit-

internalzener. ON and OFF delaytimes of 25

µsmax

in any outputstatus, including recirculating situation,

allow PWM use of L9351.

Pentawatt

ORDERING NUMBER : L9351

BLOCK DIAGRAM

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