Infineon BTS5180-2E: A High-Current PROFET™ Smart High-Side Power Switch

In the realm of automotive and industrial electronics, robust and intelligent power management is paramount. The Infineon BTS5180-2E stands out as a premier solution, a high-current PROFET™ (Protected FET) smart high-side power switch engineered to deliver superior performance, diagnostics, and protection in demanding applications.

This device is designed to control loads—such as motors, heaters, or lamps—that require high inrush currents. A key feature is its impressive continuous current capability of up to 42A, making it exceptionally suited for high-power DC applications. Its integrated smart charge pump allows for efficient operation even at low battery voltages, ensuring reliable switching performance.

The "smart" in its title is well-earned through a comprehensive suite of embedded diagnostic and protection functions. The BTS5180-2E provides precise feedback to the microcontroller on parameters including load current (via a proportional analog current sense pin), overtemperature, short-circuit conditions, and open-load detection. This enables real-time system monitoring and predictive maintenance, significantly enhancing system reliability. Crucially, it features robust protection against overvoltage, overload, and electrostatic discharge (ESD), safeguarding both the switch and the sensitive downstream circuitry.

Its very low typical on-state resistance (RDS(on)) of just 2.0 mΩ is a critical performance differentiator. This low resistance minimizes power dissipation and thermal stress, leading to higher system efficiency and reducing the need for extensive heat sinking. Housed in a TO-263-7 package, it offers an excellent power-to-size ratio and is designed for easy PCB mounting.

Typical applications are extensive, ranging from automotive body electronics (e.g., seat heaters, window lifters, sunroof controls) to industrial automation systems where controlling heavy loads with precision and safety is required.

ICGOODFIND: The Infineon BTS5180-2E PROFET™ is an industry benchmark for intelligent high-side switching. Its combination of high-current handling, ultra-low RDS(on), and advanced diagnostic capabilities makes it an indispensable component for designers building next-generation, efficient, and fault-resilient power systems.

Keywords: High-Current Switch, PROFET™, Diagnostic Functions, Low RDS(on), Automotive Grade.