This family is a response to vehicle architectures that are transitioning to hybrid and electric models, and as conventional battery systems are increasingly being supplemented or replaced by 48 V power sources which enable advanced features, enhance passenger comfort, and improve efficiency by reducing currents and simplifying wire harness complexity.
The Power PROFET + 24/48V switch family is housed in a compact, TO leadless package and includes two high-side switch variants: the BTH50030-1LUA with an R DS(ON) of 3.0 mΩ and the BTH50015-1LUA with an R DS(ON) of 1.5 mΩ, which enables minimal power losses in high-current applications.
The devices have been designed for the demanding requirements of today's automotive electrical systems and for commercial and hybrid vehicles, as well as the next generation of electric cars.
According to Infineon, one of the key benefits of the Power PROFET + 24/48V switch family is their efficiency and space-savings capabilities. The switches are highly integrated and offer resettable and diagnostic features. They are designed to provide optimal performance in demanding environments and offer a low on-resistance of just 1.5 mΩ. This makes them suitable for high-current applications and robust enough to withstand the conditions in hot cabin and engine compartments.
With more than 1,000,000 switching cycles, the switches far exceed the average 200,000 cycles of conventional relays and offer excellent reliability.
Built-in protection and diagnostic functions such as short-circuit, over-current and over-temperature protection provide safety of the device. Diagnostic signals enable advanced fault detection and increase the reliability of the entire vehicle by preventing failure modes in the power supply network.
The switches are housed in an 8-pin TO leadless package, reducing the footprint by 23 percent compared to, for example, D2PAK packages with similar thermal performance. The accuracy of the load current sense is ±5 percent after calibration and can be easily determined by reading an analogue voltage at the IS pin. In addition, the switch family is PRO-SIL ISO switch 26262-ready and comes with a safety application note that supports the evaluation of hardware elements according to ISO 26262.
To enable integration, the Power PROFET + 24/48V family is supported by the online simulation tool Infineon Automotive Power Explorer, which is available in the Infineon Developer Center. The tool helps to calculate intrinsic fuse characteristics and visualise the sense current range for specific load currents, ensuring accurate and efficient implementation.
The Power PROFET + 24/48V switches BTH50030-1LUA and BTH50015-1LUA are now in production.
