ST is shipping an automotive high-side switch controller which combines enhanced system-protection and diagnostic features with ST’s I2-t silicon-fuse technology.
As the first in ST’s new STi2Fuse family with integrated I2-t protection, the VNF1048F is compatible with 12V, 24V, and 48V automotive power subsystems (board nets).
Its flexibility is suitable for the latest automotive zonal electronic/electrical (E/E) architectures that boost efficiency and reliability while supporting increased electrification and extra functions for smart driving.
The VNF1048F has an SPI for a host MCU to configure and monitor system-protection and diagnostic features.
These include under-voltage and over-temperature protection, thermal protection for the external high-side MOSFET, desaturation shutdown, and I2-t fuse settings. High-precision digital current sensing is built in.
ADCs for monitoring the temperature-sensing thermistor voltage, output voltage, and MOSFET drain-source voltage are also integrated.
ST’s I2-t fuse, a defining feature of the STi2Fuse product family, provides over-current 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 VNF1048FTR is in production now and available in the QFN 32L 5mm x 5mm 32-lead package, from $1.77 for orders of 1000 pieces.
For more information: www.st.com/sti2fuse.