STMicroelectronics STEVAL-IFP021V1

Overview

STEVAL-IFP021V1 from STMicroelectronics is a demonstration board built around the STEF05 (5 V) and STEF12 (12 V) electronic fuses, providing dual-rail power line protection with adjustable slew rate, overvoltage clamp, undervoltage lockout, programmable short-circuit current limit (3.6 A typ.), and thermal latch protection for industrial and embedded power systems.

For engineers reviewing the STEVAL-IFP021V1 datasheet, STEVAL-IFP021V1 pinout, STEVAL-IFP021V1 application, or STEVAL-IFP021V1 equivalent, this board enables rapid evaluation of hot-swap E-Fuse behavior-including inrush control via external capacitor, fault flag signaling, enable-controlled reset, and coordinated shutdown across multi-rail systems.

Technical Context

The board implements two independent E-Fuse channels: one for 5 V input (STEF05) and one for 12 V input (STEF12), each supporting continuous 3.6 A load current and featuring integrated current monitoring, voltage clamping, and thermal shutdown. Output voltage ramp is controlled by an external capacitor on each channel's SLOPE pin.

Fault detection is signaled via a shared EN/FAULT pin that asserts low during overcurrent, overvoltage, undervoltage, or thermal events; enabling system-level coordination. Reset is achieved either by cycling V_IN or toggling the EN pin high after fault clearance.

Key Specifications

Availability

STEVAL-IFP021V1 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, telecom power distribution units, embedded computing backplanes, and medical auxiliary power supplies requiring stable component supply and repeatable evaluation of electronic fuse behavior.

Supply support for STEVAL-IFP021V1 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, designing and manufacturing microcontrollers, power management ICs, sensors, and analog/mixed-signal devices for industrial, automotive, and consumer applications.

The STEVAL-IFP021V1 belongs to ST's evaluation board portfolio for power protection ICs, specifically developed to accelerate adoption of electronic fuses in low-voltage hot-swap and rail-protection designs.

FAQ

What is the primary function of the STEVAL-IFP021V1 board?

The STEVAL-IFP021V1 is a demonstration board for evaluating the STEF05 and STEF12 electronic fuses. It provides complete, configurable protection for 5 V and 12 V power rails-including overcurrent limiting, overvoltage clamping, undervoltage lockout, and thermal shutdown-with hardware-controllable ramp rate and fault signaling via EN/FAULT pin.

How is inrush current managed on this board?

Inrush current is managed by programming the output voltage slew rate using external capacitors connected to the SLOPE pins of the STEF05 and STEF12. This controls the turn-on time and limits peak inrush during hot-swap or power-up, preventing supply droop and false triggering of upstream protection.

Can the board be used for production-level protection?

No-the STEVAL-IFP021V1 is a demonstration and evaluation tool only. While it uses production-grade STEF05 and STEF12 ICs, its layout, component selection, and lack of safety certification (e.g., UL, IEC) preclude direct use in end-equipment. It serves to validate protection architecture before custom PCB integration.

Does the board support coordinated shutdown across both rails?

Yes-both STEF05 and STEF12 share the same EN/FAULT signal path. When either device detects a fault, the EN/FAULT pin goes low, allowing external logic to disable both rails simultaneously or trigger a system-wide safe state transition.