Infineon BTS3118NHUMA1 Smart High-Side Power Switch: Features, Applications, and Benefits

The Infineon BTS3118NHUMA1 is a state-of-the-art smart high-side power switch designed to deliver robust performance, enhanced protection, and intelligent control for a wide range of automotive and industrial applications. As part of Infineon’s PROFET™ (Protected MOSFET) family of products, this device integrates advanced functionalities that simplify design, improve reliability, and reduce system cost.

Key Features

The BTS3118NHUMA1 stands out with its impressive set of integrated features. It offers a continuous current capability of up to 6.5 A from a single channel, making it suitable for driving various resistive, capacitive, and inductive loads. A critical advantage is its extremely low standby current, which is essential for battery-powered applications, particularly in modern automobiles with numerous always-on ECUs.

The device incorporates comprehensive diagnostic and protection features, including protection against over-load, short-circuit, over-temperature, and over-voltage conditions. It also provides advanced diagnostic feedback such as current sense proportional to the load current, status indication, and open-load detection in both on and off states. This level of intelligence allows for real-time system monitoring and fault management.

Primary Applications

The robustness and intelligence of the BTS3118NHUMA1 make it ideal for demanding environments. Its primary application is in the automotive industry, where it is used to control:

Powertrain systems (e.g., fuel pumps, ignition coils)

Body and comfort functions (e.g., seat heaters, window lifters, sunroof controls)

Lighting systems (e.g., headlamps, LED daytime running lights)

Beyond automotive, it is also perfectly suited for industrial automation, controlling actuators, solenoids, small motors, and heaters in PLCs and control modules.

Notable Benefits

Designers choose the BTS3118NHUMA1 for the significant benefits it delivers. The high level of integration reduces the need for external components, such as sense resistors, free-wheeling diodes, and complex logic circuits, leading to a smaller PCB footprint and lower overall bill-of-materials (BOM) cost. Its high efficiency and low power dissipation contribute to improved energy efficiency and thermal management within the application.

Furthermore, its AEC-Q100 qualification guarantees high reliability and performance under the harsh conditions of automotive environments, including wide temperature ranges and significant voltage transients. This reliability, combined with its diagnostic capabilities, is crucial for designing systems that meet stringent functional safety standards.

ICGOOODFIND

The Infineon BTS3118NHUMA1 exemplifies the trend towards smarter, more integrated power management solutions. It successfully combines high current handling, robust protection, and detailed diagnostics into a single package, offering designers a reliable and efficient building block for next-generation automotive and industrial systems. Its ability to simplify design complexity while enhancing system intelligence and safety makes it a superior choice for a multitude of power switching applications.

Keywords: Smart High-Side Switch, Automotive Power Management, Diagnostic Feedback, Over-Current Protection, AEC-Q100 Qualified.