STMicroelectronics STEVAL-ILL042V2

Overview

STEVAL-ILL042V2 from STMicroelectronics is a 60 W, high power-factor flyback LED driver demonstration board based on the L6562AT PFC controller and TSM101 secondary-side voltage/current regulator. It delivers 130 V DC at 0.462 A with >92% efficiency across 185–265 VAC input, using optocoupler-isolated feedback for stable constant-voltage and constant-current LED driving in industrial lighting systems.

For engineers reviewing the STEVAL-ILL042V2 datasheet, STEVAL-ILL042V2 application, STEVAL-ILL042V2 schematic, or STEVAL-ILL042V2 alternative evaluation boards, this page provides verified functional context, key design specifications, supply-chain availability, and manufacturer-specific implementation guidance for high-efficiency AC/DC LED driver development.

Technical Context

The board implements a transition-mode (TM) PFC front-end using the L6562AT, featuring a highly linear multiplier to minimize THD across wide load and input voltage ranges (47–63 Hz, 185–265 VAC). Its flyback stage employs the TSM101 dual op-amp for independent CV/CC regulation via isolated feedback.

Reflected voltage is fixed at 195 V with 100 V leakage spike suppression; minimum switching frequency is 57 Hz. The design achieves >92% measured efficiency at full load and meets RoHS compliance without requiring external compensation networks for basic operation.

Key Specifications

Availability

STEVAL-ILL042V2 is available at Aetrix Electronics and suitable for LED street lighting, high-bay industrial fixtures, and architectural accent lighting requiring stable component supply, reference-grade validation data, and ST-qualified topology implementation.

Supply support for STEVAL-ILL042V2 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 sensors for industrial, automotive, and consumer applications.

This board belongs to ST's STEVAL (ST Evaluation) family-engineered to accelerate prototyping of certified, production-ready power conversion topologies using ST's proprietary controllers and reference designs.

FAQ

What is the primary topology implemented on the STEVAL-ILL042V2?

The board implements a two-stage AC/DC architecture: a transition-mode (TM) boost PFC front-end using the L6562AT, followed by an optocoupler-isolated flyback DC/DC stage regulated by the TSM101 dual op-amp. This enables high PF (>0.97), low THD, and precise CV/CC LED output control.

Can the output voltage be adjusted, and if so, how?

Yes-the output voltage is set by resistive divider R12/R13 on the TSM101 INV pin (U1 pin 2); changing their ratio alters the regulated DC output. The default 130 V setting targets 100–120 V LED strings with margin. Full adjustment requires recalculating feedback components and verifying reflected voltage limits.

Does the board support dimming, and what interface options are available?

No native dimming interface is included. The board provides only fixed CV/CC output. To add analog dimming, users must inject a variable bias into the TSM101 current-sense node (U1 pin 3) or modify the voltage reference path-both require redesign and stability verification per application.

What safety certifications does the STEVAL-ILL042V2 meet out-of-the-box?

The board itself is not a certified end-product but implements reinforced isolation (≥3 kV_RMS creepage/clearance) and meets IEC 61000-3-2 Class C harmonic limits. It serves as a pre-validated platform for achieving UL/EN 62368-1 and EN 61347-2-13 certification when integrated into properly engineered luminaires.