Data Brief
For further information contact your local STMicroelectronics sales office.
September 2013 Rev 2 1/8
8
L9390
Twelve channel valve driver
Features
■Four low side switched output drivers with
0.1 Rds,ON at 25°C
Possibly configurable as PWM controlled
adding external freewheeling diodes
■Two low side PWM controlled output drivers
with 0.1 Rds,ON at 25°C and integrated active
freewheeling diodes
■Six low side current controlled output drivers
with 0.16 Rds,ON at 25°C and integrated
active freewheeling diodes
Current accuracy:
–10% (I
load < 800mA)
–6% (I
load > 800mA)
■All outputs with integrated 35V zener clamp
■Five pin SPI port (four standard pins plus
additional SPI enable input pin)
■Six serial high speed input for output control
■High level diagnostic, including Silent Valve
Driver Test
■Direct disable of outputs with an external pin
■Programmable jitter frequency of PWM and
current controlled outputs
■TQFP100 exposed pad package
Description
The L9390 is a twelve output low side valve driver
designed for use in an ABS/ESP vehicle system.
All outputs are PWM configurable, while six out of
twelve are current regulated. Each of the twelve
outputs is open drain configured and has a built-in
35V clamp. Eight of the twelve have integrated
active freewheeling diodes for active rectification
of the PWM controlled load.
In order to minimize electromagnetic emissions
during load actuation, the possibility to control
output slopes is provided.
Two separate communication interfaces are
present: the SPI port is primarily designated to
provide diagnostics and secondary control. The
serial High End Timer Interface (HET) provides
the primary output control functions from on/off
switching to current level control commands.
Diagnostic includes over current protection, under
current detection, open load detection, loss of
ground detection, loss of freewheeling diode, and
over temperature detection, output integrity
check, SVDT, leakage current test, PWM integrity
and functionality check, valve resistance sense
check, loss of freewheeling diode detection and
more.
Power supply monitoring is also included.