Infineon announces 24/48V smart power switch family
As vehicle architectures transition to hybrid and electric models, conventional battery systems are increasingly being supplemented or replaced by 48 V power sources. To support this shift Infineon is launching the Power PROFET + 24/48V switch family.
The new power switch family is housed in a 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.
They are 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 analog 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.
The Power PROFET + 24/48V family is supported by the online simulation tool Infineon Automotive Power Explorer, which is available in the Infineon Developer Centre.
The Power PROFET + 24/48V switches BTH50030-1LUA and BTH50015-1LUA are now in production. For easy integration and evaluation, a shield for Arduino (BOARD BTH50015-1LUA) is available. The product family will be expanded to include the BTH50060-1LUA, a 6 mΩ device. Samples are available on request.
