STMicroelectronics STEVAL-ILL085V1

Overview

STEVAL-ILL085V1 from STMicroelectronics is an evaluation board for the HVLED001A high-voltage quasi-resonant flyback LED controller, designed to demonstrate single-stage 75 W and two-stage 150 W high-power-factor LED driver topologies with primary-side regulation (PSR), 800 V high-voltage startup, and 0–10 V/PWM dimming compatibility.

For engineers reviewing the STEVAL-ILL085V1 datasheet, STEVAL-ILL085V1 application notes, STEVAL-ILL085V1 schematic, or STEVAL-ILL085V1 design files, this board provides validated reference implementation of HVLED001A in HPF flyback configuration with real-world thermal management, protection behavior verification (OCP, BO, OFP, oOVP), and PSR accuracy validation across universal AC input (90–264 VAC) and load range.

Technical Context

The STEVAL-ILL085V1 implements the HVLED001A in a high-power-factor (HPF) flyback topology with primary-side constant voltage regulation, using direct HVSU pin connection to rectified line for 800 V startup and input voltage sensing without auxiliary winding. It supports both 0–10 V analog and PWM dimming interfaces via dedicated CTRL and FB pins.

Board-level protections include brownout detection (IBO = 65–140 µA at ZCD), optocoupler failure detection (VOFP = 2.75–3.4 V), output overvoltage shutdown (oOVP), and smart auto-restart timer (ART) recovery-fully exercising HVLED001A's integrated fault-handling architecture without external supervision logic.

Key Specifications

Availability

STEVAL-ILL085V1 is available at Aetrix Electronics and suitable for LED driver reference design, power supply qualification testing, and lighting system compliance validation requiring stable component supply, full documentation access, and ST-validated schematics and layout files.

Supply support for STEVAL-ILL085V1 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, specializing in power management, analog, microcontrollers, and automotive-grade ICs with ISO/TS 16949-certified manufacturing.

The STEVAL-ILL085V1 belongs to ST's LED Lighting Evaluation Platform series, developed specifically to accelerate adoption of high-efficiency, high-power-factor LED drivers compliant with ENERGY STAR®, IEC 61000-3-2, and DLC requirements.

FAQ

What is the maximum output power demonstrated by STEVAL-ILL085V1?

The STEVAL-ILL085V1 demonstrates up to 75 W in single-stage high-power-factor flyback configuration and up to 150 W in two-stage configurations using the HVLED001A controller. Output power is limited by transformer design, MOSFET selection, and thermal layout-not by the evaluation board itself. Full schematics and bill-of-materials are provided in UM2114 reference manual.

Does STEVAL-ILL085V1 support both constant current and constant voltage LED driving?

STEVAL-ILL085V1 is configured for primary-side regulated constant voltage (PSR-CV) operation per HVLED001A's default mode, but supports constant current (CC) operation via external optocoupler feedback loop reconfiguration. The board includes test points and jumpers enabling CC mode validation with current-sense resistor adjustment and FB loop compensation tuning.

Can STEVAL-ILL085V1 be used with non-ST MOSFETs or transformers?

Yes-STEVAL-ILL085V1 uses standard footprints and layout guidelines compatible with industry-standard 650 V/700 V superjunction MOSFETs and custom flyback transformers. The gate driver output (GD pin) delivers 0.6 A sink / 0.3 A source peak current, supporting typical gate charges up to 40 nC. Transformer design rules and MOSFET stress analysis are documented in AN4722.

Is dimming performance verified across the full 0–10 V and PWM range?

Yes-STEVAL-ILL085V1 validates smooth 0–10 V analog dimming from 100% to 1% output with <±2% regulation error, and PWM dimming down to 100 Hz with no visible flicker. Dimming linearity, transient response, and hold-off timing (TADIS = 70–130 ms) are measured and reported in the board's test report (DocID029000 Rev 3, Section 7.6).