L9370

Specialized ICS Overview

The L9370 is an automotive IC designed for electric parking braking systems, supporting cable-puller or Motor Gear Unit (MGU) configurations. It integrates two H-bridge driver stages to control eight external FETs for rear wheel brake actuators. The device features a 32-bit 10 MHz SPI interface with CRC for configuration and diagnostics. Signal acquisition is handled by ten fully differential amplifiers with programmable gain and low offset, connected to ten sigma-delta ADC channels. Additional interfaces include two motor speed sensor inputs, four GPIO pins, and a button interface. The IC is AEC-Q100 qualified and supports functional safety concepts for ISO26262 compliance.

Specialized ICS Feature Summary

• Dual H-bridge driver stages for eight external NFETs with overcurrent protection and VDS/VGS monitoring
• Ten integrated fully differential amplifiers with precise gain and self-test capabilities
• Ten separate ADC channels for digital processing of motor current and voltage measurements
• 32-bit 10 MHz SPI interface with CRC for internal settings and diagnostics

Specialized ICS Applications

• Electric Parking Braking (EPB) systems
• Cable-puller actuator configurations
• Motor Gear Unit (MGU) configurations

Specialized ICS Procurement Notes

Verify the package type as 64-TQFP (10x10) and ensure the component meets AEC-Q100 automotive qualification standards. Confirm that the specific revision supports the required ISO26262 functional safety targets for your chassis application. Check datasheet specifications for battery input voltage ranges down to 5.5 V to ensure compatibility with system power requirements.

Specialized ICS Selection Notes

Select this IC for applications requiring integrated motor drive and precise current/voltage sensing in a single package. Ensure the design accommodates eight external power NFETs driven by the internal pre-drivers. Verify that the host microcontroller can support the 32-bit SPI communication protocol with CRC error checking for reliable system diagnostics and configuration.

Specialized ICS Part Context

The L9370 belongs to STMicroelectronics' portfolio of Chassis and Safety ICs, which includes analog and mixed-signal solutions for braking and vehicle dynamics. These components are developed using leading-edge technological processes to meet automotive quality standards. The product line aligns with ISO26262 functional safety requirements, providing scalable solutions for passive safety and active braking systems.

Specialized ICS Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Consult official STMicroelectronics resources for cross-reference information if alternative sourcing is required.

Specialized ICS FAQ

What is the minimum battery input voltage supported by the L9370?

The L9370 provides full drive of external power NFETs down to a 5.5 V battery input voltage.

How many ADC channels are integrated into the L9370?

The device contains ten separate ADC channels for the digital processing of motor current and voltage measurements.

Is the L9370 suitable for functional safety applications?

Yes, the L9370 includes a functional safety concept designed for ISO26262 compliance.