Infineon BSP762TXUMA1 Smart High-Side Switch: Features, Applications, and Technical Overview
The Infineon BSP762TXUMA1 represents a state-of-the-art smart high-side power switch designed for robust and intelligent control of high-current loads. As part of Infineon's extensive portfolio of automotive and industrial power solutions, this device integrates advanced protection, diagnostic features, and control interfaces into a single, compact package, making it an ideal choice for modern electronic systems demanding reliability and efficiency.
Key Features
The BSP762TXUMA1 is built around a vertical N-channel power MOSFET with a very low typical on-state resistance (RDS(on)) of just 6 mΩ. This low resistance is crucial for minimizing power losses and heat generation, enabling efficient switching of high currents up to 40 A. A standout feature of this device is its integrated slew rate control, which minimizes electromagnetic interference (EMI), a critical requirement in automotive environments to prevent disruption of sensitive communication networks.
Comprehensive embedded protection functions are a hallmark of its "smart" capabilities. These include:
Overload and short-circuit protection with active current limiting.
Overtemperature shutdown with automatic restart.
Overvoltage protection, including load-dump resilience.
Reverse battery protection (with an external series diode).
Furthermore, it provides sophisticated diagnostic feedback via a status output pin. This pin can signal various conditions to a microcontroller, such as normal operation, open-load detection, overtemperature pre-warning, and short-circuit events, enabling predictive maintenance and system monitoring.
Primary Applications
The combination of high current handling, robust protection, and diagnostic intelligence makes the BSP762TXUMA1 exceptionally suited for a wide array of applications:
Automotive Systems: It is perfect for driving resistive and inductive loads prevalent in modern vehicles. Common uses include controlling seat heaters, window lifters, sunroof motors, fuel pumps, and various solenoids.
Industrial Automation: The switch reliably manages actuators, valves, small motors, and high-power LEDs in industrial control modules.
Consumer and Appliances: Its robustness is valuable in high-end domestic appliances and power distribution units where safe and reliable switching is paramount.
Technical Overview
Housed in a PG-TO263-7-31 surface-mount package (D2PAK), the device offers excellent thermal performance for power dissipation. It operates from a wide supply voltage range, typically from 5.5 V to 36 V, and can handle transient voltages up to 40 V, ensuring compatibility with 12 V and 24 V battery systems.
Control is achieved through a 3.3 V and 5 V logic-compatible input pin, allowing for direct interfacing with microcontrollers without the need for level shifters. The internal charge pump generates the necessary voltage to drive the N-channel MOSFET efficiently. The device's current limitation and thermal shutdown are precisely calibrated to protect both the switch itself and the connected load from damage under fault conditions.
The Infineon BSP762TXUMA1 stands out as a highly integrated and reliable solution for high-side switching. Its exceptional blend of very low RDS(on), comprehensive built-in protection mechanisms, and detailed diagnostic capabilities makes it a superior choice for designers tackling the challenges of automotive and industrial applications. It simplifies circuit design, enhances system safety, and improves overall reliability.
Keywords: Smart High-Side Switch, Overcurrent Protection, Diagnostic Feedback, Low RDS(on), Automotive Applications.
