Infineon TLE75080ESH: A High-Performance 80V Octal Low-Side Switch for Automotive Applications

The increasing electrification of modern vehicles demands robust, compact, and intelligent power switching solutions. Addressing this need, Infineon Technologies has introduced the TLE75080ESH, an advanced 80V octal low-side switch engineered to drive a wide array of resistive, capacitive, and inductive loads with exceptional reliability. This highly integrated circuit is a cornerstone for building efficient and safe electronic control units (ECUs) in the harsh automotive environment.

Designed for Automotive Rigor

As a product of Infineon’s proven SMART7 technology, the TLE75080ESH is built to withstand the electrical challenges of 12V automotive systems. Its high operating voltage of 80V offers a significant safety margin, providing robust protection against load-dump and other voltage transients common in automotive power nets. This makes it an ideal solution for driving demanding loads such as solenoids, valves, motors, and lamps.

Key Features and Intelligent Integration

The device integrates eight independent channels, each capable of sinking up to 350 mA of continuous current. This high level of integration allows designers to replace multiple discrete components or smaller ICs, saving valuable board space, reducing system complexity, and enhancing overall reliability.

A standout feature of the TLE75080ESH is its comprehensive suite of diagnostic and protection functions. Each channel is equipped with precise current sensing, open-load detection (both off-state and on-state), and overtemperature protection. Furthermore, the device includes protection against short circuits to ground and battery, ensuring safe operation under fault conditions. This diagnostic capability is crucial for functional safety applications, enabling the system to quickly identify and respond to failures.

Communication with a host microcontroller is handled via a standard Serial Peripheral Interface (SPI), which allows for individual control of each channel and the reading back of detailed diagnostic information, including output status and overtemperature flags.

Target Applications

The combination of high voltage robustness, multi-channel output, and intelligent diagnostics makes the TLE75080ESH perfectly suited for a multitude of automotive applications, including:

Body Control Modules (BCMs): Controlling interior lighting, power windows, and door locks.

Engine Management Systems: Driving fuel injectors, solenoids, and ignition coils.

Transmission Control Units (TCUs): Actuating valves and clutches.

Heating, Ventilation, and Air Conditioning (HVAC) systems.

ICGOOODFIND

The Infineon TLE75080ESH stands out as a superior solution for automotive power switching. It successfully merges high voltage resilience, multi-channel integration, and advanced diagnostic intelligence into a single package. By offering robust performance and enhancing system safety, it empowers engineers to develop next-generation automotive electronics that are both more compact and more reliable, effectively addressing the core challenges of vehicle electrification.

Keywords:

1. Automotive

2. Low-Side Switch

3. Diagnostics

4. 80V

5. SPI