STMicroelectronics STEVAL-ILL053V2

Overview

STEVAL-ILL053V2 from STMicroelectronics is an evaluation board implementing a 130 W, 48 V / 2.7 A LED driver for street lighting, featuring a two-stage architecture with L6562AT transition-mode PFC and L6599AT high-voltage LLC resonant controller. It operates across 85–305 VAC input, achieves >91% efficiency at full load (115 VAC), and eliminates electrolytic capacitors using EPCOS film capacitors for extended lifetime.

For engineers reviewing the STEVAL-ILL053V2 datasheet, STEVAL-ILL053V2 application, STEVAL-ILL053V2 schematic, or STEVAL-ILL053V2 bill of materials, this board serves as a validated reference design for high-reliability, high-efficiency AC/DC LED power supplies compliant with EN61000-3-2 Class C harmonics and EN55022 Class B EMI standards.

Technical Context

The board implements a front-end boost PFC stage controlled by the L6562AT IC, operating in transition mode to meet Class C harmonic limits across universal AC input. Input rectification uses GBU8J bridge and STTH3L06U ultrafast diode, while bulk filtering relies on X2-rated film capacitors (C2, C3, C5, C7) instead of electrolytics.

The isolated DC/DC stage employs the L6599AT dual-gate resonant controller driving STF25N60M2-EP and STD11N60M2-EP MDmesh™ M2 EP MOSFETs in an LLC topology. Output regulation uses TS2431AILT shunt reference with optocoupler feedback (SFH617A-2X009), delivering tightly regulated 48 V with overvoltage, overcurrent, short-circuit, and open-loop protection with auto-restart.

Key Specifications

Availability

STEVAL-ILL053V2 is available at Aetrix Electronics and suitable for LED street lighting development, industrial outdoor lighting qualification, and high-reliability AC/DC converter reference design requiring stable component supply and full regulatory compliance documentation.

Supply support for STEVAL-ILL053V2 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, analog devices, and sensors for automotive, industrial, and consumer applications.

This board belongs to ST's STEVAL (ST Evaluation) series, specifically targeting LED lighting system developers with fully documented, safety-certified, and EMC-compliant reference designs for rapid prototyping and compliance validation.

FAQ

What is the primary function of the STEVAL-ILL053V2 evaluation board?

The STEVAL-ILL053V2 is a complete, tested reference design for a 130 W LED driver used in street lighting applications. It integrates a transition-mode PFC stage and an LLC resonant DC/DC converter to deliver regulated 48 V / 2.7 A output from universal AC input, with full safety, EMI, and harmonic compliance.

Which STMicroelectronics ICs are used for PFC and resonant control?

The board uses the L6562AT transition-mode PFC controller for the front-end boost stage and the L6599AT high-voltage resonant controller for the isolated LLC DC/DC stage. Both ICs are configured per ST's DB3803 application note and include external gate drivers, current sensing, and protection circuitry.

Does the board include protection features, and how are they implemented?

Yes - it provides overload, short-circuit, and open-loop protection on both PFC and LLC stages, plus input overvoltage protection with auto-restart recovery. Protection is implemented via dedicated pins on L6562AT (ZCD, CS) and L6599AT (ISEN, LINE, PFC-STOP), with discrete comparators and optocoupler feedback.

Can the STEVAL-ILL053V2 be modified for different output voltages or power levels?

Yes - the output voltage is set by resistor dividers on the TS2431AILT reference and optocoupler feedback loop; changing R45/R47 adjusts regulation point. Power scaling requires verifying thermal limits of STF25N60M2-EP, STD11N60M2-EP, transformer T1, and resonant tank components (L2, L3, C16, C34).