BSP742RXUMA1: Technical Specifications and Application Overview
The BSP742RXUMA1 is a highly integrated, intelligent high-side power switch engineered in advanced Smart Power Technology (SPT). It represents a key solution for precise and protected power distribution in a wide array of automotive and industrial electronic control units (ECUs). This device combines a vertical power MOSFET with sophisticated protection and diagnostic features, all housed within a compact and robust PG-SOT223-4-11 package.
Technical Specifications
The core of the BSP742RXUMA1 is a N-channel vertical power MOSFET with a very low typical on-state resistance (RDS(on)) of just 80 mΩ. This low resistance is critical for minimizing conduction losses and improving overall system efficiency, especially in high-current applications. The device is designed to operate over a wide supply voltage range from 5.5 V to 42 V, making it exceptionally suited for the demanding environments of 12 V and 24 V automotive systems, which must handle load-dump and jump-start conditions.
A standout feature of this high-side switch is its comprehensive suite of integrated protection and diagnostic functions. These include:
Overload and Short-Circuit Protection: The device features an adjustable current limitation, protecting both the switch and the load from damage during fault conditions.
Overtemperature Shutdown: An internal temperature sensor shuts down the power stage if the junction temperature exceeds a critical threshold, with automatic restart upon cooling.
Overvoltage Clamp: The output is clamped during inductive load switching, protecting against voltage spikes.
Reverse Battery Protection: The switch can withstand a reverse voltage of up to -42 V, safeguarding the circuit without the need for an external series diode.
Open Drain Diagnostic Output (STATUS): This pin provides real-time fault feedback to the microcontroller, indicating conditions like overtemperature, short-circuit, or open-load.
The device is controlled via a 3.3 V and 5 V compatible logic input (IN), allowing for direct interfacing with modern microcontrollers without the need for level shifters.
Application Overview
The BSP742RXUMA1 is predominantly designed for automotive applications, meeting the stringent AEC-Q100 qualification standards. Its primary role is to replace electromechanical relays and fuses, offering a faster, more reliable, and silent switching solution. Common use cases include:
Driving resistive, inductive, and capacitive loads such as valves, motors, LEDs, and heaters.
Body Control Modules (BCM) for controlling interior lighting, power windows, and seat adjusters.
Engine Management Systems for controlling fans, pumps, and solenoids.
Industrial Automation systems where robust and reliable power switching is required for actuators and sensors.
Its diagnostic capability enables the implementation of predictive maintenance and detailed system health monitoring, which are cornerstones of modern electronic systems.
The BSP742RXUMA1 is an exemplary smart high-side switch that delivers robust performance, high integration, and critical diagnostic feedback. It is an optimal choice for designers seeking to enhance the reliability, efficiency, and intelligence of power distribution systems in harsh automotive and industrial environments.
Keywords: Smart High-Side Switch, Automotive Grade, Integrated Protection, Diagnostic Output, Low RDS(on)
