The L9369 is designed for electric parking braking applications and can be used in cable-puller or Motor Gear Unit configurations (MGU).
The cores are two H-bridge driver stages that drive eight external FETs for the brake actuators on the back wheels. The stages are completely driven and adjustable via SPI, as well as PWM control mode and overcurrent protection, with drain-source and gate-source voltages being monitored.
Fully differential amplifiers with programmable and exact gain and low offset, as well as 10 ADC sigma-delta modulators, are used to acquire synchronized motor voltages and currents.
Two HS/LS stages with variable output voltage and feedforward control are present to drive LED arrays.
To obtain position feedback from braking actuators, two Motor Speed Sensor interfaces (MSS) are available (shared with the Lamp driver stage and GPIO).
Four GPIO (General Purpose I/O) pins and a button interface round out the collection of interfaces, allowing customers to control unique customer requirements from the Electronic Parking Braking (EPB) button panel in both Normal and Sleep Mode.
Features
2 Motor Speed Sensors (MSS) interfaces to acquire speed information feedback via external Hall sensors.
System wake-up in Sleep Mode
Watchdog (configurable via SPI)
Full drive of external power NFETs down to 5.5 V battery input voltage
Monitoring on Main power supply and continuous BIST for internal regulators
Double Bandgap reference
4 General Purpose I/O stages (GPIO)
Button Interface (9 configurable I/O pins) for monitoring and diagnostics in Normal and Sleep Mode.
Programmable and NFET independent thresholds for VDS monitoring
10 integrated Fully differential amplifiers with low offset, very precise gain, and self-test
10 separate ADC channels for digital processing of motor current and voltage measurement
32-bits - 10 MHz SPI with CRC for internal setting, self-test and diagnostics
AEC-Q100 qualified
Functional safety concept for ISO26262 compliance
4 High-side and Low-side gate pre-drivers for 8 external power NFETs
Overcurrent protection with programmable thresholds
