Infineon TLE9471-3ESV33: A Comprehensive System Basis Chip for Automotive Applications

The increasing complexity of automotive electronic control units (ECUs) demands highly integrated, robust, and efficient power management solutions. Addressing this need, Infineon Technologies has developed the TLE9471-3ESV33, a state-of-the-art System Basis Chip (SBC) that combines multiple critical functions into a single package. This device is engineered to serve as the central nervous system for power distribution, communication, and monitoring in a wide array of automotive applications, particularly in body control modules, gateways, and sensor integration.

At its core, the TLE9471-3ESV33 is built around a high-efficiency voltage regulator system. It features two primary regulators: a 5V/300mA low-dropout (LDO) regulator for powering microcontrollers and a 3.3V/300mA LDO for peripheral components. This dual-output design ensures stable and clean power rails, which are crucial for the reliable operation of sensitive digital circuits. Furthermore, the chip includes a pre-regulator that allows it to operate directly from the vehicle's battery, handling the harsh environment of automotive power nets, including load dump, cold-crank conditions, and reverse polarity.

Beyond power management, the TLE9471-3ESV33 excels in providing robust communication interfaces. It integrates a high-speed CAN FD (Flexible Data-Rate) transceiver, which is essential for high-bandwidth data exchange between ECUs in modern vehicle networks. The transceiver is fully compliant with the latest ISO 11898-2:2016 standard and offers excellent electromagnetic compatibility (EMC) and electrostatic discharge (ESD) protection, ensuring reliable communication in the electrically noisy automotive environment.

A key feature of this SBC is its integrated watchdog and window watchdog with a selectable time base. This function continuously monitors the microcontroller for correct program execution, enhancing system safety and enabling the design of systems that meet ASIL (Automotive Safety Integrity Level) requirements as defined by the ISO 26262 standard. For enhanced diagnostic capabilities, the chip also provides a failure output pin and comprehensive status reporting, allowing for immediate system response to any fault conditions.

The device is housed in a space-saving VQFN-48 package with an exposed die pad for superior thermal performance. Its operational junction temperature range of -40°C to 150°C ensures functionality under the most extreme automotive conditions. The TLE9471-3ESV33 is not just a component but a comprehensive solution that simplifies system design, reduces the bill of materials (BOM), and accelerates time-to-market for next-generation automotive electronics.

ICGOODFIND: The Infineon TLE9471-3ESV33 is a highly integrated and robust System Basis Chip that consolidates power supplies, a CAN FD transceiver, and safety monitoring features. It is an ideal, all-in-one solution for enhancing reliability and simplifying design in demanding automotive electronic systems.

Keywords: System Basis Chip (SBC), Automotive Power Management, CAN FD Transceiver, ASIL Compliance, Voltage Regulator.