STMicroelectronics STEVAL-ILL045V1

Overview

STEVAL-ILL045V1 from STMicroelectronics is a 9 W, Triac-dimmable, non-isolated LED driver demonstration board based on the HVLED815PF controller IC. It delivers incandescent-equivalent light output (40–60 W), achieves > 0.98 power factor and < 20% THD across 90–132 VAC, and fits A19 lamp form factor (28 mm diameter, 52 mm length) for US-market retrofit LED bulbs.

For engineers reviewing the STEVAL-ILL045V1 datasheet, STEVAL-ILL045V1 pinout, STEVAL-ILL045V1 application, or STEVAL-ILL045V1 equivalent, this board provides validated reference design implementation of primary-side regulated, PFC-enabled flyback topology with integrated 800 V avalanche-rated FET and Triac dimmer compatibility.

Technical Context

The board implements a transition-mode PFC-flyback converter using the HVLED815PF, which integrates an 800 V avalanche-rated power FET and primary-side regulation circuitry. It eliminates optocouplers and secondary-side feedback while maintaining ±5% LED current regulation over wide input voltage (90–132 VAC) and LED string voltage ranges.

Internal startup circuitry removes need for external rapid-start components; near-sinusoidal line current is achieved via active PFC control. Open-load protection is implemented via primary-side voltage regulation, and dimming is enabled through phase-cut detection compatible with standard leading-edge Triac dimmers.

Key Specifications

Availability

STEVAL-ILL045V1 is available at Aetrix Electronics and suitable for LED lamp retrofit design, residential smart lighting development, and energy-efficient lighting certification testing requiring stable component supply and reference-grade validation.

Supply support for STEVAL-ILL045V1 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 sensors for industrial, automotive, and consumer applications.

This evaluation board belongs to ST's LED Lighting Solutions portfolio, engineered specifically to accelerate development of cost-effective, standards-compliant, dimmable LED retrofit lamps for North American residential markets.

FAQ

Is STEVAL-ILL045V1 certified for UL/CSA or ENERGY STAR?

No-STEVAL-ILL045V1 is a demonstration board, not a certified end-product. It serves as a reference design for building UL-listed or ENERGY STAR-qualified lamps. Designers must perform full safety, EMI, and photometric testing on their final product per applicable regional standards (e.g., UL 1598C, CSA C22.2 No. 250.0).

Can STEVAL-ILL045V1 operate outside the 90–132 VAC range?

No-it is strictly designed for 90–132 VAC nominal input, aligned with US line voltage tolerances. Operation below 90 VAC causes unstable dimming and reduced output; above 132 VAC risks overstress on the HVLED815PF's 800 V FET and may violate THD specifications.

Does this board support trailing-edge (ELV) dimmers?

No-STEVAL-ILL045V1 is optimized for leading-edge (Triac) dimmers only. Its phase-cut detection and startup timing are tuned for high dv/dt edge triggering. Trailing-edge dimmer compatibility would require redesign of snubber network, gate drive timing, and zero-crossing detection circuitry.

What is the maximum LED string voltage supported?

The board supports up to 30 V DC LED string voltage at 300 mA output current. This corresponds to ~9–10 white LEDs in series (3.0–3.3 V/Vf). Exceeding 30 V risks violating the HVLED815PF's internal overvoltage protection threshold and compromising regulation accuracy.