L9950 Datasheet, PDF (1/23 Pages) STMicroelectronics – DOOR ACTUATOR DRIVER

L9950
DOOR ACTUATOR DRIVER
1 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
2 APPLICATIONS
Door Actuator Driver with bridges for door lock and
safe lock, mirror axis control, mirror fold and highside
Figure 2. Block Diagram
VCC
CP
CM/PWM2
1k
PWM2
DI
1k
DO
1k
CLK
1k
CSN
1k
PW M1
1k
Note: resistors between µC and
L9950 are recommended to limit
currents for negative voltage
transients at VBAT (e.g. ISO
type 1 pulse).
GND
Figure 1. Package
PowerSO36
Table 1. Order Codes
Part Number
L9950
L9950TR
Package
PowerSO36
Tape & Reel
driver for mirror defroster and four 5W-light bulbs.
3 DESCRIPTION
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
Reve rse
Polarity
10k
Protection
OUT1 xy-Mirror
Motors
M ^OUT2
Note: value of capacitor has to be
choosen carefully to limit the VS
VS _{voltage below absolute maximum}
ratings in case of an unexpected
freewheeling condition (e.g. TSD,
POR)
M ^OUT3
M ^OUT4
OUT5 ^Lock
M OUT6
Safe Lock
OUT7
OUT8
M
Mirror Fold
Exteriour Light
Footstep Light
OUT9
Safety Light
OUT10
OUT11
Turn Indicator
Defroster
July 2004
REV. 3
1/23