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                1/4
                L9951
                April 2004
                This is preliminary information on a new product now in development. Details are subject to change without notice.
                1FEATURES
                One half bridge for 7.4A load (r
                on
                = 150m
                .
                )
                Two half bridges for 5A load (r
                on
                = 200m
                .
                )
                Two highside drivers for 1.25A load
                (r
                on
                = 800 m
                .
                )
                Programmable Softstart function to drive loads
                with higher inrush currents (i.e.current >7.4A,
                >5A, >1.25A)
                Very low current consumption in standby mode
                (I
                S
                < 3μA, typ. T
                j
                85 °C)
                All outputs short circuit protected
                Current monitor output for all highside drivers
                All outputs over temperature protected
                Open load diagnostic for all outputs
                Overload diagnostic for all outputs
                Programmable PWM control of all outputs
                Charge Pump output for reverse polarity
                protection
                2APPLICATION
                Rear Door Actuator Driver with bridges for door
                lock and safe lock and two 5W or 10W-light
                bulbs.
                3DESCRIPTION
                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
                T
                a
                bl
                e 1.
                O
                r
                d
                er
                C
                o
                d
                es
                Part NumberPackage
                L9951PowerSO36
                REV. 2
                9uu