STMicroelectronics STEVAL-ILL066V2

Overview

STEVAL-ILL066V2 from STMicroelectronics is a 100 W LED street lighting evaluation board built around the STLUX385A digital controller, featuring primary-side regulation, ZVS resonant DC/DC conversion, and support for DALI v2.0, 0–10 V, and UART dimming interfaces. It delivers 92% peak efficiency at full load (100 V @ 1 A or 200 V @ 0.5 A) with <250 mW idle power consumption and real-time open/short-circuit fault detection.

For engineers reviewing the STEVAL-ILL066V2 datasheet, STEVAL-ILL066V2 pinout, STEVAL-ILL066V2 application, or STEVAL-ILL066V2 equivalent, this board serves as a complete reference design for digitally controlled, isolated, single-output LED drivers targeting smart street lighting, industrial area lighting, and IoT-connected luminaires requiring multi-protocol dimming and high-efficiency PSR topology.

Technical Context

The board implements a two-stage AC/DC architecture: an active PFC front-end followed by a zero-voltage-switching (ZVS) LLC resonant converter, both digitally managed by the STLUX385A. The controller integrates ADCs, PWM generators, communication peripherals (DALI, UART, analog 0–10 V), and protection logic - eliminating external signal conditioning and interface ICs.

Primary-side regulation enables precise LED current control without secondary-side feedback components, while 11-bit dimming resolution supports smooth brightness transitions down to near-zero current. Fault handling includes automatic shutdown on open-circuit or short-circuit conditions, with recovery via reset or communication command.

Key Specifications

Availability

STEVAL-ILL066V2 is available at Aetrix Electronics and suitable for smart street lighting deployments, industrial high-bay LED systems, and IoT-enabled architectural lighting projects requiring stable component supply, rapid prototyping validation, and multi-standard dimming interoperability.

Supply support for STEVAL-ILL066V2 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, sensors, and analog/mixed-signal solutions for automotive, industrial, and consumer applications.

The STEVAL-ILL066V2 belongs to ST's Lighting & Power Conversion Evaluation Platform product line, engineered to accelerate development of digitally controlled, high-efficiency LED drivers compliant with DALI, Zhaga, and IEC 62386 standards.

FAQ

What firmware is required to operate the STEVAL-ILL066V2?

The board requires STSW-ILL066V2 firmware, preloaded on the STLUX385A during factory programming. Users can update it via SWIM interface using ST Visual Programmer or ST-LINK/V2 tools. Firmware supports all three dimming protocols simultaneously and includes configurable protection thresholds, startup timing, and thermal derating curves.

Can the STEVAL-ILL066V2 drive multiple LED strings?

No - the board is designed for a single isolated LED output only, with fixed +/− DC output terminals (J4). Its PSR-based control loop and current sensing are optimized for one string; driving parallel strings would require external current balancing and invalidate safety isolation and regulation accuracy.

Is the DALI interface galvanically isolated?

Yes - the DALI interface uses optocouplers (FOD817AS) and separate isolated power rails, meeting IEC 62386-102 Class I insulation requirements. Pinout J3 provides non-polarized DALI signal lines referenced to DALI_gnd, enabling direct connection to certified DALI-2 master controllers without additional isolation components.

Does the board support USB-to-UART bridge functionality out of the box?

Yes - the onboard FT232R IC (U20) provides native USB-to-UART conversion. When J48 is used (default configuration), the board enumerates as a CDC ACM device on Windows/macOS/Linux, exposing UART_RX_PC and UART_TX_PC signals for firmware updates, debug logging, and custom protocol integration without external adapters.