L9950
DOOR ACTUATOR DRIVER
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FEATURES
One full bridge for 6A load (r
on
= 150mΩ )
Two half bridges for 3A load (r
on
= 300mΩ )
Two half bridges for 1.5A load (r
on
= 800mΩ )
One highside driver for 6A load (r
on
= 100mΩ )
Four highside drivers for 1.5A load (r
on
= 800 mΩ )
Programmable Softstart function to drive loads
with higher inrush currents (i.e. current
>6A,>3A,>1.5A)
Very low current consumption in standby mode
I
S
< 6µA, typ. Tj
≤
85 °C)
All outputs short circuit protected
Current monitor output for 300mΩ ,150mΩ and
100m highside drivers
All outputs over temperature protected
Open load diagnostic for all outputs
Overload diagnostic for all outputs
Seperated half bridges for door lock motor
PWM control of all outputs
Charge Pump output for reverse polarity
protection
Figure 1. Package
PowerSO36
Table 1. Order Codes
Part Number
L9950
L9950TR
Package
PowerSO36
Tape & Reel
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driver for mirror defroster and four 5W-light bulbs.
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DESCRIPTION
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APPLICATIONS
Door Actuator Driver with bridges for door lock and
safe lock, mirror axis control, mirror fold and highside
Figure 2. Block Diagram
The L9950 is a microcontroller driven multifunc-
tional door actuator driver for automotive applica-
tions.Up to five DC motors and five grounded
resistive loads can be driven with six half bridges
and five highside drivers. The integrated standard
serial peripheral interface (SPI) controls all opera-
tion modes (forward, reverse, brake and high im-
pedance).
All diagnostic informations are available via SPI.
VBAT
VCC
CP
10k
100k
Reverse
Polarity
Protection
MUX
CM/PWM2
1k
VS
voltage below absolute maximum
Note: value of capacitor has to be
choosen carefully to limit the VS
ratings in case of an unexpected
freewheeling condition (e.g. TSD,
POR)
OUT1
OUT2
xy-Mirror
Motors
1k
Driver Interface & Diagnostic
PWM2
DI
DO
1k
M
M
M
Lock
OUT3
CLK
1k
SPI
µ
C
OUT4
OUT5
OUT6
CSN
1k
PWM1
1k
M
Safe Lock
M
Mirror Fold
Exteriour Light
OUT7
OUT8
OUT9
OUT10
OUT11
Note: resistors between
µ
C and
L9950 are recommended to limit
currents for negative voltage
transients at VBAT (e.g. ISO
type 1 pulse).
Footstep Light
Safety Light
Turn Indicator
Defroster
GND
July 2004
REV. 3
1/23
STMICROELECTRONICS [ STMICROELECTRONICS ]
