STMicroelectronics STEVAL-ILL052V1

Overview

STEVAL-ILL052V1 from STMicroelectronics is a European-version demonstration board implementing a 48 V / 2.7 A (130 W) high-efficiency LED street lighting power supply. It integrates a two-stage architecture: an active PFC front-end using the L6562AT controller and an LLC resonant DC-DC stage based on the L6599AT, achieving >90% full-load efficiency without heatsinks and eliminating long-life electrolytic capacitors via EPCOS film capacitors.

For engineers reviewing the STEVAL-ILL052V1 datasheet, STEVAL-ILL052V1 pinout, STEVAL-ILL052V1 application, or STEVAL-ILL052V1 equivalent, this board serves as a validated reference for EN61000-3-2 Class C compliant, double-insulated, SELV-compliant LED driver designs operating across 177–277 VAC input with robust protection including auto-restart on overload, short-circuit, open-loop, and overvoltage faults.

Technical Context

The board implements a continuous-conduction-mode (CCM) boost PFC stage controlled by the L6562AT, delivering regulated high-voltage DC bus to an asymmetric half-bridge LLC resonant converter driven by the L6599AT. Input rectification uses GBU8J bridge and X2-class EMI filtering capacitors (C2, C3, C4), while output rectification employs STPS10150CG Schottky diodes.

Protection functions are hardware-based and distributed across both stages: overcurrent sensing via shunt resistors (R34, RX1, RX2), input overvoltage detection via voltage divider networks, and thermal derating is avoided through <30 mm component height and zero-heatsink thermal design enabled by >90% efficiency and film-capacitor reliability.

Key Specifications

Availability

STEVAL-ILL052V1 is available at Aetrix Electronics and suitable for LED street lighting, outdoor area illumination, smart city infrastructure, and EN-compliant industrial lighting applications requiring stable component supply, reference-grade validation, and regulatory-ready design starting points.

Supply support for STEVAL-ILL052V1 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, power ICs, analog chips, and silicon solutions for industrial, automotive, and consumer markets.

This board belongs to ST's STEVAL (ST Evaluation) series-engineered to accelerate development of certified, high-reliability LED drivers by providing fully tested, documented, and safety-compliant reference implementations.

FAQ

Is STEVAL-ILL052V1 RoHS compliant?

Yes. The board complies with RoHS Directive 2011/65/EU, using lead-free solder, halogen-free laminates, and restricted-substance-conforming passives and ICs throughout the assembly, as confirmed in the October 2012 data brief (Doc ID 023797 Rev 1).

Can STEVAL-ILL052V1 operate with non-European input voltages?

No. Its input stage is specifically tuned for 177–277 VAC operation. Attempting use outside this range may cause PFC instability, overvoltage stress on bulk capacitors, or failure to regulate the LLC stage-no design margin or configuration options exist for wider input ranges.

What is the role of the TS2431AILT on this board?

The TS2431AILT serves as a precision adjustable shunt regulator in the feedback loop of the LLC secondary-side synchronous rectifier control circuit, enabling accurate 48 V output regulation and compensating for transformer winding resistance and diode forward drop variations.

Does STEVAL-ILL052V1 include thermal management components?

No discrete thermal management components (e.g., heatsinks, fans, or thermal pads) are used. Thermal performance relies entirely on PCB copper area (single-sided 35 μm FR-4), low-loss topology selection, film capacitor placement, and >90% conversion efficiency-validated to maintain all components below 75 °C at full load in free-air conditions.