L9370中文資料意法半導(dǎo)體數(shù)據(jù)手冊(cè)PDF規(guī)格書

Features

? 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

? 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

? 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.

? 2 Motor Speed Sensors (MSS) interfaces to

acquire speed information feedbacks via

external Hall sensors.

? System wake-up in Sleep Mode

? Watchdog (configurable via SPI)

Description

The L9370 targets the specific application of

electric parking braking, suitable for system

configuration in cable-puller or Motor Gear Unit

(MGU).

The cores are two H-bridge driver stages to drive

8 external FETs for the rear wheels brakes

actuators. The stages are fully driven and

configurable via SPI, also in PWM control mode

and protected against overcurrent, with drainsource

and gate-source voltages monitoring.

A synchronized motor voltages and currents

acquisition, is performed via full differential

amplifiers with programmable and precise gain

and low offset and 10 ADC sigma-delta

modulators.

Two configurable HS/LS stages are present with

programmable output voltage to drive LED arrays,

with feedforward regulation.

2 Motor Speed Sensor interfaces (MSS) are

available to acquire position feedback from brake

actuators (shared with Lamp driver stage and

GPIO).

The set of the interfaces is completed by 4 GPIO

(General Purpose I/O) pins and a button interface

allows to manage specific customer requirements

from Electronic parking braking (EPB) button

console both in Normal and Sleep Mode.