Automotive High-side Switch Controller for Enhanced System Protection
The STMicroelectronics VNF1048F automotive high-side switch controller 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 ideal 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. [1]
Figure 1. Automotive High-side Switch Controller For Enhanced System Protection
Figure 1 shows the feature-rich and adaptable VNF1048F has a serial peripheral interface (SPI) for a host microcontroller 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. Analog-to-digital converters (ADCs) for monitoring the temperature-sensing thermistor voltage, output voltage, and MOSFET drain-source voltage are also integrated. [2]
The ST I2 fuse enables monitoring, control, and digital interface capabilities to allow automotive systems to comply with ISO26262 and related Safety Integrity Levels (SIL). The integration of I2-t protection with a digital interface enhances its efficiency and reliability in automotive zonal electronic/electrical (E/E) architectures. It assists in greater electrification and supplementary functions of smart driving.
Key features of VNF1048F
- Minimal requirement of space
- Effortless and workable software design
- It consists of an advanced Wire gauge and harness for better efficiency
- Low number of external components
- MCU is not very complicated
- Serial Peripheral Interface
- Provides thermal protection
- High-precision digital current sensing [3]
References:
- https://electronicsera.in/st-reveals-automotive-high-side-switch-controller/
- https://www.manufacturingtodayindia.com/sectors/an-automotive-high-side-switch-controller-with-flexible-diagnostics-and-protection
- https://www.electronicsforu.com/news/new-products/automotive-high-side-switch-controller-for-enhanced-system-protection
Cite this article:
Thanusri swetha J (2022), Automotive High-side Switch Controller for Enhanced System Protection, Anatechmaz, pp. 400