Infineon BTS3080EJXUMA1: High-Side Power Switch for Automotive and Industrial Applications

The demand for robust, efficient, and intelligent power switching solutions continues to grow across the automotive and industrial sectors. Addressing this need, Infineon Technologies introduces the BTS3080EJXUMA1, a high-side power switch engineered to deliver superior performance, diagnostic capabilities, and system protection. This device exemplifies the integration of power, control, and sensing into a single compact package, simplifying design while enhancing reliability.

As a high-side switch, the BTS3080EJXUMA1 is designed to control a grounded load by switching the positive supply voltage rail. It is built using Infineon’s proprietary Smart SIPMOS technology, which combines a vertical power MOSFET with a CMOS control circuit on a single monolithic chip. This integration allows for a highly efficient switch with a very low typical on-state resistance (R_DS(on)) of just 6.5 mΩ. The low R_DS(on) is a critical parameter, as it directly translates to reduced conduction losses and lower heat generation, enabling higher efficiency and potentially eliminating the need for an external heatsink in many applications.

The device is particularly suited for the harsh environments of automotive electronics. It is AEC-Q100 qualified, ensuring it meets the stringent reliability standards required for vehicle systems. Typical uses include driving resistive, capacitive, and inductive loads such as heating elements, LEDs, and small DC motors found in body control modules, seat and mirror adjusters, and interior lighting systems. Its ability to handle high inrush currents, such as those from cold incandescent lamps, makes it exceptionally robust.

Beyond raw switching performance, the BTS3080EJXUMA1 is an intelligent power switch. It features a comprehensive suite of diagnostic and protection functions that are crucial for both functional safety and predictive maintenance. Key protections include:

Overload and Short-Circuit Protection: Safely limits output current in fault conditions.

Overtemperature Shutdown: Prevents thermal runaway by turning off the power stage if the junction temperature exceeds a safe threshold.

Overvoltage Protection (Clamping): Protects the switch from voltage transients common in automotive environments.

Ground Loss and Supply Voltage Undervoltage Protection: Ensures correct operation during power supply anomalies.

Diagnostic feedback is provided through a status flag pin that can indicate various fault conditions, such as overtemperature or open load, allowing the microcontroller to take appropriate action. The open-load detection works both when the switch is off and in its active state, providing full operational visibility.

For industrial applications, these same features ensure reliable operation in PLCs (Programmable Logic Controllers), factory automation, and control systems where 24V DC loads are common. The device’s ESD robustness and high immunity to electrical transients ensure longevity in electrically noisy environments.

ICGOODFIND: The Infineon BTS3080EJXUMA1 stands out as a highly integrated and intelligent solution for high-side switching. Its exceptional combination of very low R_DS(on), a rich set of embedded protection features, and robust automotive-grade qualification makes it an ideal choice for designers seeking to improve power density, efficiency, and system reliability in demanding automotive and industrial applications.

Keywords: High-Side Switch, Automotive Grade, Low R_DS(on), Diagnostic Protection, Smart SIPMOS