Infineon TLE9350VSJ: A Comprehensive System Basis Chip for Automotive Applications

The increasing complexity of automotive electronic control units (ECUs) demands highly integrated and robust solutions. Addressing this need, the Infineon TLE9350VSJ stands out as a premier System Basis Chip (SBC) that consolidates multiple vital functions into a single, compact package. Designed specifically for the harsh environment of automotive applications, this chip is a cornerstone for building efficient and reliable electronic systems in modern vehicles.

At its core, the TLE9350VSJ is engineered to power and manage microcontrollers, particularly those in the Aurix™ family. It features multiple regulated voltage supplies, including a high-efficiency step-down (buck) DC-DC controller and two low-dropout (LDO) linear voltage regulators. This ensures a stable and clean power supply to the host microcontroller and other peripheral components, which is critical for system stability and data integrity.

A key strength of this SBC is its robust network connectivity. It integrates a high-speed CAN FD (Flexible Data-Rate) transceiver, which is essential for communication within vehicle networks. This transceiver is designed to meet strict automotive standards, offering excellent electromagnetic compatibility (EMC) and electrostatic discharge (ESD) protection, ensuring reliable data exchange even in electrically noisy environments.

Beyond power and communication, the TLE9350VSJ enhances system safety and control. It includes multiple high-side switches for direct control of loads like sensors or LEDs. For system monitoring and safety, it offers a window watchdog and a fail-safe output stage. These features allow the chip to monitor the microcontroller’s operation and initiate predefined safety actions in case of a software hang or voltage anomaly, contributing directly to functional safety goals (e.g., ISO 26262 ASIL-B).

Furthermore, the device is built for resilience. Its wide operating voltage range and protection features against over-voltage, reverse battery, and overtemperature conditions make it exceptionally suited for the demanding 12V automotive power systems.

ICGOODFIND: The Infineon TLE9350VSJ is an all-in-one power and communication hub that significantly reduces system complexity and board space. Its integration of power supplies, a CAN FD interface, and protection features makes it an indispensable component for developing compact, reliable, and safe automotive ECUs.

Keywords: System Basis Chip (SBC), Automotive ECU, CAN FD Transceiver, Voltage Regulation, Functional Safety (ASIL-B)