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STMicroelectronics — VNF1048F High-Side Switch Controller

 

STMicroelectronics

 

STMicroelectronics VNF1048F High-Side Switch Controller

With intelligent fuse protection for 12 V, 24 V and 48 V automotive applications

The STMicroelectronics VNF1048F is an advanced controller for a power MOSFET in high side configuration, designed for the implementation of an Intelligent High Side Switch for 12 V, 24 V and 48 V automotive applications. The Control IC is interfaced to a host microcontroller through a 3.3 V and 5 V CMOS-compatible SPI interface and provides protection and diagnostics to the system.

This gate controller embeds a unique fuse emulator functionality that – combined with the other state of the art diagnostic and protection features – allows to replace standard fuses for wire harness protection and CO2 emissions reduction.

Features

  • AEC-Q100 automotive qualified
  • General
    • High side switch Control IC with e-fuse protection for Automotive 12 V, 24 V and 48 V applications
    • SPI slave interface for host control
    • 32-bit ST-SPI interface compatible with 3.3 V and 5 V CMOS level
    • 2 stage charge pump
    • Gate drive for an external MOSFET in high side configuration
    • High precision uni-directional digital current sense via SPI through an external high side shunt resistor
    • Input for a NTC resistor to monitor the external MOSFET temperature
    • Very low standby current
    • Robust fail-safe functionality through internal and external controls
    • SPI register lock-out by a dedicate digital input pin
    • Integrated ADC for TJ, VNTC, VOUT and VDS conversion
  • Protections
    • Battery under-voltage shut-down
    • External MOSFET desaturation shutdown configurable via SPI
    • Hard short circuit latch-off configurable via SPI
    • Current vs time latch-off configurable via SPI (fuse-emulation)
    • Device overtemperature shutdown
    • External MOSFET overtemperature shutdown
  • Intelligent high current fuse replacement for automotive applications
  • Especially intended for automotive power distribution applications

Market Domain

  • Smart Power Distribution
  • Traditional melting fuses replacement
  • High current loads driving

STMicroelectronics — VNF1048F High-Side Switch Controller

 

VNF1048F Block Diagram

STMicroelectronics — VNF1048F Block Diagram

VNF1048F Application Diagram

STMicroelectronics — VNF1048F Application Diagram

 

VNF1048F Evaluation Board: EV-VNF1048F

The EV-VNF1048F board provides an easy way to connect VNF1048F into existing system.

STMicroelectronics — VNF1048F Evaluation Board

All Features

  • EV-VNF1048F easy board that is able to work connected to EV-SPC582B to create an intelligent high side switch for 12 V, 24 V and 48 V automotive applications
  • General High side switch Control IC with e-fuse protection for Automotive 12 V, 24 V and 48 V applications
  • SPI slave interface for host control 32-bit ST-SPI interface compatible with 3.3 V and 5 V CMOS level 2 stage charge pump
  • Gate drive for an external MOSFET in high side configuration
  • High precision uni-directional digital current sense via SPI through an external high side shunt resistor Input for a NTC resistor to monitor the external MOSFET temperature
  • Very low standby current
  • Robust fail-safe functionality through internal and external controls
  • SPI register lock-out by a dedicate digital input pinIntegrated ADC for TJ, VNTC, VOUT and VDS conversion
  • Battery under-voltage shut-down
  • External MOSFET desaturation shutdown configurable via SPI
  • Hard short circuit latch-off configurable via SPI
  • Current vs time latch-off configurable via SPI (fuse-emulation)Device overtemperature shutdown
  • External MOSFET overtemperature shutdown
  • Intelligent high current fuse replacement for automotive applications
  • Especially intended for automotive power distribution applications

 

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