STMicroelectronics VNF1048F automotive high-side switch controller

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The STMicroelectronics VNF1048F automotive high-side switch controller combines enhanced system-protection and diagnostic features with ST’s I²-t silicon-fuse technology. As part of the STi²Fuse family, the switch controller features integrated I²-t protection and is compatible with 12, 24 and 48 V automotive power subsystems (board nets). Its flexibility makes it suitable for automotive zonal electronic/electrical (E/E) architectures that boost efficiency while supporting increased electrification and extra functions for smart driving.

The ST I²-t fuse is designed to provide fast-acting, resettable and reliable overcurrent protection. Silicon fuses also help simplify vehicle wiring harnesses and reduce weight by eliminating user-accessible fuse boxes and the associated cabling and installation overheads. The savings in weight contribute to improving vehicle performance, including extended driving range and reduced CO₂ emissions.

The adaptable switch controller has a serial peripheral interface (SPI) for a host microcontroller to configure and monitor system-protection and diagnostic features. These include undervoltage and overtemperature protection, thermal protection for the external high-side MOSFET, desaturation shutdown and I²-t fuse settings. The switch controller also features built-in high-precision digital current sensing. Analog-to-digital convertors (ADCs) for monitoring the temperature-sensing thermistor voltage, output voltage and MOSFET drain-source voltage are also integrated. The switch controller is available in the QFN 32 L 5 x 5 mm 32-lead package.

For more information: www.st.com/sti2fuse.