For further information contact your local STMicroelectronics sales office.

January 2019

DB3818 Rev 1

1/13

L9370

Automotive IC for a specific application of electric parking braking

Data brief

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 drain-

source 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.

LQFP64 (10x10x1.4mm)

Table 1. Device summary

Order code

Package

Packing

L9370-TR

LQFP64

Tape & Reel

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