describe

L9369 is specific to the application of electric parking brake and is applicable to the system configuration of cable puller or motor gear unit (MGU).

The core is two h-axle drive stages, which are used to drive eight external FETs of the rear wheel brake actuator. These stages are fully driven and configured through SPI, and also in PWM control mode to prevent overcurrent, drainage and gate source voltage monitoring.

The voltage and current of synchronous motor are collected through full differential amplifier and 10adsigma delta modulator. The two configurable hs/ls stages have programmable output voltage to drive the LED array and have feedforward regulation. 2 the motor speed sensor interface (MSS) can be used for position feedback from the brake actuator (shared with the lamp drive stage and GPIO).

The interface is set up by four GPIO (universal i/o) pins, and a button interface allows management of specific customer requirements of the electronic parking brake (EPB) button console in normal and sleep modes.

features

 aec-q100 qualified

 compliance with the functional safety concept of iso26262

 4 high side and low side gate pre drivers for 8 external power nFET

 programmable overcurrent protection threshold

 programmable and nFET independent VDS Monitoring Threshold

 10 integrated fully differential amplifiers with low offset, very accurate gain and self-test

 process measurement of motor current and voltage for 10 separate digital ADC channels

 32-bit -10 MHz SPI with internal CRC settings, self-test and diagnostics

 full drive 5.5 V battery input voltage of external power nFET

 continuous BIST for main power monitoring and internal regulators

 double band gap reference

 4 general purpose input / output stages (GPIO)

 button interface (9 configurable I / O pins) normal and sleep modes.

 two motor speed sensor (MSS) interfaces obtain speed information and feed it back to external Hall sensors in the following ways.

 system wakeup in sleep mode

 watchdog (configurable via SPI)