Infineon AUIR2085STR: High-Performance Intelligent Power Switch for Automotive Applications
The relentless drive towards enhanced vehicle electrification, safety, and comfort demands robust and intelligent electronic components. At the heart of many of these advanced systems are Intelligent Power Switches (IPS), which provide the critical interface between low-power control units and high-power actuators. The Infineon AUIR2085STR stands out as a premier example of such a component, engineered specifically to meet the rigorous demands of the modern automotive environment.
This device is a high-side switch based on Infineon's advanced SMART7 technology. It is designed to control a wide range of resistive, capacitive, and inductive loads, such as solenoids, valves, motors, and lamps, which are ubiquitous in automotive body electronics modules. Its primary role is to manage significant power levels—handling continuous currents up to 11A and operating voltages up to 40V—while being controlled by a simple microcontroller signal.
The "intelligent" aspect of the AUIR2085STR is what truly differentiates it from a simple mechanical relay or MOSFET. It incorporates a comprehensive suite of integrated protection and diagnostic features that are crucial for automotive reliability and functional safety. These include:
Overload and Short-Circuit Protection: The device actively limits the output current to protect itself and the connected load in case of a fault condition.
Over-Temperature Shutdown: An internal temperature sensor shuts the output off if the junction temperature exceeds a safe threshold, preventing thermal destruction.
Over-Voltage Clamping: Protects the switch from voltage transients commonly found in the harsh automotive electrical environment.
Loss of Ground and Loss of Battery Protection: Ensures the switch remains in a safe state even if these critical connections are interrupted.
Advanced Diagnostic Feedback: It provides detailed status information back to the microcontroller, including open-load detection (both in on- and off-state), short-circuit indication, and overtemperature pre-warning. This capability is essential for predictive maintenance and system health monitoring.
Housed in a PG-DSO-8-46 (DPAK) package, the AUIR2085STR offers excellent power dissipation in a compact form factor. Its design and manufacturing are tailored for automotive-grade reliability, adhering to the stringent AEC-Q100 qualification standards. This ensures long-term performance under extreme temperatures, humidity, and vibration, making it an ideal solution for applications in power steering systems, engine management, transmission control, and comfort electronics.
ICGOOODFIND: The Infineon AUIR2085STR is a highly integrated, robust, and intelligent solution for automotive power management. Its blend of high-current handling, extensive embedded protection circuits, and comprehensive diagnostic capabilities provides system designers with a reliable building block that enhances overall system safety, reduces board space, and simplifies design complexity, ultimately contributing to more reliable and advanced vehicles.
Keywords: Intelligent Power Switch, Automotive-Grade, Diagnostic Features, Overload Protection, AEC-Q100
