Infineon BTS50901EJAXUMA1: High-Side Power Switch for Robust Automotive and Industrial Applications

In the demanding worlds of automotive and industrial electronics, reliability, efficiency, and protection are paramount. The Infineon BTS50901EJAXUMA1 stands out as a premier high-side power switch engineered specifically to meet these rigorous challenges. This intelligent power PROFET™ (Protected MOSFET) device integrates a vertical power MOSFET with a suite of advanced protective and diagnostic features into a single, compact package, offering designers a robust and highly integrated solution for controlling resistive or inductive loads.

Unmatched Robustness and Integration

Housed in a space-saving PG-TO263-7 package, the BTS50901EJAXUMA1 is designed to handle high-current applications with ease. It features a continuous current capability of up to 5.5 A and is characterized by an exceptionally low typical on-state resistance (R_DS(on)) of just 80 mΩ. This low resistance is critical for minimizing conduction losses, leading to higher system efficiency and significantly reduced heat generation. Such performance is vital for energy-sensitive applications and for extending the operational life of the component and the system it powers.

Comprehensive Protection Suite

The device’s resilience is a cornerstone of its design. It provides robust protection against a wide array of fault conditions that are common in harsh environments. These include:

Overload and Short-Circuit Protection: Safely limits output current in case of a fault, protecting both the switch and the load.

Overtemperature Shutdown: Automatically disconnects the load if the junction temperature exceeds a safe threshold, preventing thermal damage.

Overvoltage Protection (including load dump): Withstands voltage transients typical in automotive environments, such as load dump pulses.

Reverse Battery Protection: Safeguards the circuit from damage if the battery connections are accidentally reversed, a crucial feature for automotive applications.

Ground Loss and Supply Loss Protection: Ensures predictable behavior even in cases of faulty wiring or interrupted connections.

Advanced Diagnostic Capabilities

Beyond protection, the BTS50901EJAXUMA1 offers sophisticated diagnostic feedback to the microcontroller. It provides an analog current sense signal (IS) that is proportional to the load current, enabling precise monitoring without the need for an external shunt resistor. Furthermore, it features a status output flag that can signal open-load conditions (both in on and off-state) and overtemperature pre-warning, allowing the system to take preemptive action before a full shutdown is necessary. This level of diagnostics is essential for functional safety and predictive maintenance.

Diverse Application Landscape

The combination of power, protection, and intelligence makes this switch ideal for a broad spectrum of applications. In the automotive sector, it is perfectly suited for driving various loads, including body control modules (e.g., lighting, windshield heaters, seat heaters), powertrain systems, and HVAC controls. In the industrial realm, it excels in programmable logic controllers (PLCs), factory automation, solenoid and valve control, and power distribution units.

ICGOOODFIND

The Infineon BTS50901EJAXUMA1 is a superior high-side power switch that delivers an optimal blend of high performance, integrated protection, and diagnostic intelligence. Its ruggedized design makes it an indispensable component for engineers developing next-generation automotive and industrial systems where durability, efficiency, and functional safety are non-negotiable.

Keywords: High-Side Switch, Automotive Grade, Load Diagnostics, Overcurrent Protection, PROFET™