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L9951

April 2004

This is preliminary information on a new product now in development. Details are subject to change without notice.

1

FEATURES

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Programmable Softstart function to drive loads

with higher inrush currents (i.e.current >7.4A,

>5A, >1.25A)

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Very low current consumption in standby mode

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All outputs short circuit protected

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Current monitor output for all highside drivers

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All outputs over temperature protected

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Open load diagnostic for all outputs

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Overload diagnostic for all outputs

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Programmable PWM control of all outputs

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Charge Pump output for reverse polarity

protection

2

APPLICATION

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Rear Door Actuator Driver with bridges for door

lock and safe lock and two 5W or 10W-light

bulbs.

3

DESCRIPTION

The L9951 is a microcontroller driven multifunc-

tional rear door actuator driver for automotive ap-

plications. Up to two DC motors and two grounded

resistive loads can be driven with three half bridg-

es and two highside drivers. The integrated stan-

dard serial peripheral interface (SPI) controls all

operation modes (forward, reverse, brake and

high impedance). All diagnostic informations are

available via SPI.

PowerSO36

DATA BRIEF

DOOR ACTUATOR DRIVER

BLOCK DIAGRAM

DI

CM/PWM

DO

CLK

CSN

VCC

GND

CP

Exteriour Light

Safety Light

OUT1

OUT2

OUT3

OUT4

OUT5

M

M

Lock

Safe Lock

VBAT

Reverse

Polarity

Protection

EN

VS

Note: value of capacitor has to be choosen

carefully to limit the VS voltage below absolute

maximum ratings in case of an unexpected

freewheeling condition (e.g. TSD, POR)

PWM

Table 1. Order Codes

Part Number

Package

L9951

PowerSO36

REV. 2