STMicroelectronics STEVAL-ILL074V1

Overview

STEVAL-ILL074V1 from STMicroelectronics is a 60 W, wide-input-range (90–277 V_rms, 45–66 Hz), quasi-resonant flyback evaluation board based on the HVLED001A controller IC. It delivers a regulated 52 V / 1.2 A main output and an auxiliary 15 V / 50 mA rail, achieves >90% full-load efficiency, high power factor, low THD, and complies with EN60065 safety standard.

For engineers reviewing the STEVAL-ILL074V1 datasheet, STEVAL-ILL074V1 pinout, STEVAL-ILL074V1 application, or STEVAL-ILL074V1 equivalent, this board serves as a validated reference design for LED driver auxiliary supply generation, isolated industrial bias rails, and high-efficiency AC/DC conversion in lighting and embedded power subsystems.

Technical Context

The board implements a primary-side regulated, quasi-resonant flyback topology using the HVLED001A - a high-voltage, current-mode controller with integrated 800 V startup circuitry and active power factor correction. It supports valley-switching operation to minimize switching losses across universal AC input.

Protection features include overvoltage lockout (OVP), brown-out detection, cycle-by-cycle current limiting, short-circuit protection with auto-restart, and thermal shutdown. The double-sided 165 mm × 50 mm PCB integrates all magnetics, MOSFET, rectifiers, and feedback components for immediate functional validation.

Key Specifications

Availability

STEVAL-ILL074V1 is available at Aetrix Electronics and suitable for LED driver auxiliary supply generation, isolated industrial bias rail development, and high-efficiency AC/DC conversion in lighting and embedded power subsystems requiring stable component supply and rapid prototyping capability.

Supply support for STEVAL-ILL074V1 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 ICs, sensors, and analog/mixed-signal devices for automotive, industrial, and consumer applications.

This board belongs to ST's STEVAL (ST Evaluation) series - purpose-built reference designs that demonstrate real-world implementation of ST's power management ICs, enabling fast validation of topology performance, protection behavior, and regulatory compliance.

FAQ

What is the primary function of the STEVAL-ILL074V1 evaluation board?

The STEVAL-ILL074V1 is a fully assembled, tested reference design for a 60 W quasi-resonant flyback converter. Its core function is to generate a stable, isolated 52 V main output and a 15 V auxiliary output from universal AC input, serving as a validated platform for LED driver auxiliary supplies and industrial bias rail development.

Does the board include the HVLED001A controller IC?

Yes - the STEVAL-ILL074V1 integrates the HVLED001A quasi-resonant flyback controller IC as its primary control element. This IC provides primary-side regulation, active PFC, valley-switching control, and comprehensive protection including OVP, brown-out, short-circuit auto-restart, and thermal shutdown.

Can the 15 V auxiliary output power external circuitry?

Yes - the 15 V auxiliary output is rated for up to 50 mA continuous current and is intended to power low-power secondary-side components such as optocoupler drivers, voltage references, or small logic circuits. It is electrically isolated from the main output and shares the same transformer winding configuration.

Is the STEVAL-ILL074V1 RoHS compliant and certified for safety standards?

Yes - the board is RoHS compliant and has been designed and validated to meet EN60065 for electrical safety, including reinforced insulation, creepage/clearance distances, and fault-condition robustness. It is not certified to EN61347 or IEC 62368-1, and no UL/CE marking is applied to the board itself.