STMicroelectronics STEVAL-ILL016V1

Overview

STEVAL-ILL016V1 from STMicroelectronics is a 15 W offline LED driver evaluation board designed for TRIAC phase-control dimming in 115 V AC residential and commercial lighting systems. It delivers up to 40 V output voltage and 0.7 A average LED current, achieves ≥0.9 power factor without dimmer, meets ENERGY STAR® v1.0 for SSL luminaires, and supports 25,000–35,000 hour LED lifetime.

For engineers reviewing the STEVAL-ILL016V1 datasheet, STEVAL-ILL016V1 pinout, STEVAL-ILL016V1 application, or STEVAL-ILL016V1 equivalent, this board provides verified reference design implementation of L6562AD-based transition-mode PFC + flyback topology with integrated dimming interface, acoustic noise <24 dBA, and isolated "safe" output compliance.

Technical Context

The board implements a single-stage PFC-flyback converter using the L6562AD transition-mode controller and TSM1052 LED current regulator. Input rectification and filtering feed a 0.6 mH primary inductance transformer (CSM2010-128), enabling high-efficiency operation across 96–132 V_rms line range.

Dimming is achieved via optocoupler-coupled feedback (PS2703-1) and bipolar transistor interface (MMBT4401), translating TRIAC conduction angle into regulated average LED current down to 10% of full scale. Output isolation is reinforced by reinforced creepage/clearance design and Y-capacitor (C17) placement.

Key Specifications

Availability

STEVAL-ILL016V1 is available at Aetrix Electronics and suitable for LED retrofit lamp development, residential smart lighting integration, and commercial downlight driver qualification requiring stable component supply and pre-validated dimming performance.

Supply support for STEVAL-ILL016V1 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, analog ICs, power devices, and sensor solutions for industrial, automotive, and consumer markets.

This board belongs to ST's STEVAL (ST Evaluation) series - purpose-built reference designs that accelerate LED driver development by delivering fully tested, application-ready hardware and schematics aligned with ENERGY STAR®, FCC, and safety standards.

FAQ

What input voltage range does STEVAL-ILL016V1 support?

The board operates from 96 V_rms to 132 V_rms at 60 Hz, targeting North American 120 V AC mains. It is not rated for 230 V operation. Input filtering uses X2-class capacitors (C3, C5) and a 1 A fuse (F1), with surge protection provided by MOV D5 (not shown on schematic but present on PCB layout per ST documentation).

Does STEVAL-ILL016V1 require external components to enable TRIAC dimming?

No external components are required - the board integrates all necessary circuitry: zero-crossing detection via R10/R17/C13 network, optocoupler isolation (U2 PS2703-1), and current-sense regulation via R27/R29 (0.56 Ω parallel shunt). Dimming compatibility is validated with standard leading-edge TRIAC dimmers including Lutron and Leviton models.

What is the maximum LED string configuration supported?

The board supports up to two parallel LED strings, each rated for 350 mA average current and up to 40 V total forward voltage (e.g., 8 × 3.2 V LEDs per string). Total output power remains capped at 15 W. The design assumes constant-current regulation via U3 TSM1052 and current-sense resistors R27/R29.

Is isolation certified to safety standards?

Yes - the board provides reinforced isolation between primary and secondary sides, with ≥4 mm creepage and ≥3 mm clearance on PCB, Y-capacitor (C17) rated for 1 kV, and transformer (T1 CSM2010-128) meeting IEC 61558-2-16 requirements. Output is SELV-compliant (<60 V DC under fault conditions).