BTS5045-2EKA: High-Current PROFET™ Smart High-Side Power Switch

In the realm of automotive and industrial electronics, the efficient and reliable management of high-current loads is a critical design challenge. The BTS5045-2EKA, a member of Infineon's PROFET™ (Protected MOSFET) family, stands out as a premier solution for these demanding applications. This smart high-side power switch is engineered to control loads with a continuous current of up to 28A, integrating a host of protective and diagnostic features into a single, robust package.

At its core, the device utilizes a vertical N-channel power MOSFET with an extremely low typical on-state resistance (RDS(on)) of just 5.5 mΩ. This high efficiency minimizes power dissipation and reduces heat generation, which is paramount for energy-sensitive and thermally constrained systems. The integration of this MOSFET with a smart control circuit is what defines it as a "PROFET."

A key strength of the BTS5045-2EKA is its comprehensive suite of embedded protection and diagnostic functions. It is designed to be inherently robust against the harsh electrical environments typical in automotive applications. Key protections include:

Overload and Short-Circuit Protection: The device automatically limits the output current in case of a fault, safeguarding both the switch and the connected load.

Overtemperature Shutdown: An integrated temperature sensor shuts down the output if the junction temperature exceeds a safe threshold, preventing thermal damage.

Overvoltage Protection (including load-dump): It can withstand voltage transients common in automotive power nets.

Reverse Battery Protection: The device is designed to survive a reversed connection of the supply voltage without external components.

Furthermore, it provides precise diagnostic feedback to the microcontroller via a dedicated Status output pin. This pin can signal various conditions such as overload, open-load, and overtemperature pre-warning, enabling predictive maintenance and enhanced system control.

Housed in a PG-TO-263-7-31 (DPAK-7) package, the BTS5045-2EKA offers an excellent power-to-size ratio and is compatible with standard SMT assembly processes. Its primary applications are found in controlling high-current actuators, including but not limited to:

Automotive body control modules (e.g., powering seat heaters, window lifters, sunroofs)

Industrial solenoids and valves

DC motors

Heating elements

ICGOOODFIND: The BTS5045-2EKA PROFET™ is a highly integrated, intelligent power switch that delivers superior performance, robustness, and diagnostic capabilities. It simplifies design, enhances system reliability, and provides critical feedback, making it an optimal choice for engineers tackling high-current switching challenges in harsh environments.

Keywords: High-Current Switch, PROFET™, Diagnostic Feedback, Overload Protection, Automotive Grade.