STMicroelectronics STEVAL-ILL074V2

Overview

STEVAL-ILL074V2 from STMicroelectronics is a 60 W, wide-input-range (90–277 V_rms, 45–66 Hz), isolated flyback evaluation board using the HVLED001A controller in FOT mode, delivering a regulated 52 V / 1.2 A main output and an auxiliary 15 V / 50 mA output on a 165 mm × 50 mm double-sided PCB.

For engineers reviewing the STEVAL-ILL074V2 datasheet, STEVAL-ILL074V2 pinout, STEVAL-ILL074V2 application, or STEVAL-ILL074V2 equivalent, this board supports rapid validation of high-PF, low-THD AC/DC conversion for LED driver secondary-side power supplies with integrated short-circuit and overvoltage protection.

Technical Context

The board implements a primary-side controlled flyback topology with the HVLED001A IC operating in fixed-off-time (FOT) mode, enabling high power factor (>0.9) and low THD (<15%) across universal AC input. Input surge and brown-out handling are managed by the controller's built-in protections.

Isolation is achieved via reinforced transformer design meeting EN60065 safety requirements; output regulation is maintained under load variation and line transients, with auto-restart short-circuit protection ensuring lighting-grade reliability.

Key Specifications

Availability

STEVAL-ILL074V2 is available at Aetrix Electronics and suitable for LED driver development, industrial lighting reference designs, and AC/DC power supply qualification requiring stable component supply, full-safety documentation, and production-ready layout validation.

Supply support for STEVAL-ILL074V2 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, designing and manufacturing microcontrollers, analog ICs, power devices, and silicon solutions for automotive, industrial, and consumer applications.

This board belongs to ST's STEVAL (ST Evaluation) series-engineered to accelerate prototyping and compliance testing of power conversion topologies using ST's proprietary controllers like HVLED001A.

FAQ

What is the primary function of the STEVAL-ILL074V2 board?

The STEVAL-ILL074V2 is a fully assembled, safety-certified evaluation board implementing a 60 W isolated flyback converter. Its core function is to generate a stable, insulated 52 V bus for LED driver secondary-side circuitry-such as current-sink controllers-and a 15 V auxiliary rail for low-power biasing, all from universal AC input.

Which controller IC is used on this board and what is its key operating mode?

The board uses the ST HVLED001A high-voltage controller IC, configured in Fixed-Off-Time (FOT) mode. This mode enables inherent power factor correction without additional sensing components, delivers tight output regulation across line/load variations, and integrates protections including overvoltage, brown-out, and short-circuit with auto-restart.

Does the board support input surges or abnormal line conditions?

Yes-the HVLED001A controller provides built-in protection against excessive input voltage (e.g., surges, bursts), very low input voltage (brown-out), and output overload/short-circuit. These features ensure robust operation in real-world lighting environments where grid instability is common, with automatic recovery after fault clearance.

Can this board be used for production-level power supply design?

No-it is an evaluation board intended for functional verification, topology validation, and safety-compliance pre-testing. While it uses production-grade components (e.g., STF14N80K5 MOSFET for 277 Vac), layout, thermal design, and certification are optimized for lab use-not volume manufacturing or end-product integration without redesign and requalification.