STMicroelectronics EV-VNF1048F

Overview

EV-VNF1048F from STMicroelectronics is an evaluation board pre-assembled with the VNF1048F high-side switch controller IC, designed for intelligent power distribution in 12 V, 24 V, and 48 V automotive systems. It integrates SPI-controlled e-fuse protection, high-precision current sensing via external shunt, NTC-based MOSFET temperature monitoring, dual-stage charge pump gate drive, and robust fail-safe diagnostics.

For engineers reviewing the EV-VNF1048F datasheet, EV-VNF1048F pinout, EV-VNF1048F application, or EV-VNF1048F equivalent, this board enables rapid validation of high-side switching, overcurrent latch-off (fuse emulation), desaturation detection, battery under-voltage shutdown, and SPI register lock-out in automotive power distribution designs.

Technical Context

The EV-VNF1048F implements a host-controlled high-side switch architecture using the VNF1048F IC, which features a 32-bit ST-SPI interface compatible with both 3.3 V and 5 V CMOS logic levels. It supports configurable protection thresholds-including current-vs-time fuse emulation and external MOSFET desaturation detection-via SPI-accessible registers.

Board-level design includes dedicated test points for VS, HWLO, DIAG, and SPI signals; on-board shunt resistor (RSENSE_1) for uni-directional current sensing; and NTC interface (NTC_M/NTC) for thermal monitoring of the external PowerFLAT™ 5x7 MOSFET (STL135N8F7AG). All critical supply paths use decoupling capacitors per datasheet recommendations.

Key Specifications

Availability

EV-VNF1048F is available at Aetrix Electronics and suitable for automotive power distribution, body control modules, and intelligent junction box applications requiring stable component supply and fast prototyping capability.

Supply support for EV-VNF1048F includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive, industrial, and power management solutions with broad IP and manufacturing scale.

The VNF1048F product line targets intelligent high-side switching for 12–48 V automotive power networks, emphasizing programmable e-fuse behavior, diagnostic transparency, and robustness against harsh electrical environments.

FAQ

What microcontroller interfaces are supported by the EV-VNF1048F board?

The board uses a 32-bit ST-SPI interface compliant with standard CMOS logic levels at 3.3 V or 5 V, enabling direct connection to most automotive-grade MCUs without level shifters. SPI signals (CS, SCK, SDI, SDO) are routed to CN5 and CN9 connectors with defined pin assignments per DB4826 Rev 2.0.

Does the EV-VNF1048F include the external MOSFET required for operation?

Yes - the board is pre-assembled with STL135N8F7AG, a 48 V-rated PowerFLAT™ 5x7 N-channel MOSFET mounted adjacent to the VNF1048F IC. This allows immediate functional testing of high-side switching, current limiting, and thermal protection without additional component selection or layout.

How is overcurrent protection implemented on this evaluation board?

Overcurrent protection uses configurable fuse-emulation logic: current magnitude and duration are monitored via the external shunt resistor and internal ADC, with latch-off triggered when the I²t threshold is exceeded. Configuration is done via SPI register writes, supporting both hard-short and time-dependent trip profiles.

Can the EV-VNF1048F be used with non-automotive DC supplies?

Yes - while optimized for 12 V, 24 V, and 48 V automotive systems, the board operates across 6–60 V nominal supply and tolerates up to 70 V transients. Its protection features remain active, making it suitable for industrial 24/48 V DC power distribution and test-bench validation of high-side switch behavior.