Infineon TLE9261-3BQXV33: System Basis Chip for Automotive Power Management

The increasing complexity of automotive electronic control units (ECUs) demands highly integrated and robust power management solutions. Addressing this need, Infineon Technologies introduces the TLE9261-3BQXV33, a state-of-the-art System Basis Chip (SBC) designed to be the cornerstone of power, communication, and safety in modern vehicle architectures. This device exemplifies the trend towards higher integration, combining multiple critical functions into a single package to enhance reliability while reducing system size and cost.

At its core, the TLE9261-3BQXV33 is engineered to provide a complete power supply solution for microcontrollers and sensors. It features two independent voltage regulators: a high-performance 5V/300mA low-dropout (LDO) regulator for the microcontroller core and a second 5V/150mA LDO for sensor supply. This ensures clean, stable power even in the harsh electrical environments typical of automotive applications, characterized by wide voltage ranges and significant transients.

A key strength of this SBC is its integrated communication interfaces. It includes a high-speed CAN FD (Flexible Data-Rate) transceiver, which is essential for high-bandwidth data exchange between ECUs in advanced driver-assistance systems (ADAS), infotainment, and body control modules. The transceiver is designed for low electromagnetic emission (EME) and high electromagnetic immunity (EMI), ensuring robust and error-free communication. Additionally, the chip often incorporates a local interconnect network (LIN) transceiver, providing a cost-effective solution for managing sub-networks of sensors and actuators.

Beyond power and communication, the TLE9261-3BQXV33 is built with functional safety as a paramount concern. It is developed according to the ISO 26262 standard, supporting systems up to ASIL B safety level. It incorporates a comprehensive suite of monitoring and protection features, including:

Undervoltage (UV) and overvoltage (OV) detection on supply lines.

Overtemperature and short-circuit protection on all regulators.

A windowed watchdog and a fail-safe output stage to enable a safe state in case of a microcontroller failure.

These features make it an ideal choice for safety-relevant applications, helping manufacturers meet stringent automotive safety requirements.

The device is offered in a space-saving VQFN-48 package, suitable for the compact layouts of modern ECUs. Its AEC-Q100 qualified status guarantees its performance and reliability over the demanding temperature ranges and lifetimes expected in the automotive industry.

ICGOOODFIND: The Infineon TLE9261-3BQXV33 System Basis Chip is a highly integrated, safety-focused solution that consolidates power management, network communication, and system monitoring into a single, robust device. It significantly simplifies ECU design, reduces component count, and enhances overall system reliability, making it a pivotal component for next-generation automotive electronics.

Keywords: System Basis Chip (SBC), Automotive Power Management, CAN FD Transceiver, Functional Safety (ASIL), AEC-Q100 Qualified.