STMicroelectronics STEVAL-ILL004V2

Overview

STEVAL-ILL004V2 from STMicroelectronics is an obsolete evaluation board for phase-angle AC dimming and mono-phase motor control, built around the ST7ULTRALITE 8-pin microcontroller and ACST67S TRIAC, supporting 50/60 Hz mains input, <5 mA standby current, and adjustable EMI filtering compliant with EN55014/EN55015/EN61000-3-2 Class A.

For engineers reviewing the STEVAL-ILL004V2 datasheet, STEVAL-ILL004V2 pinout, STEVAL-ILL004V2 application, or STEVAL-ILL004V2 equivalent, this board enables rapid prototyping of TRIAC-based light dimming and motor speed regulation in home appliance and industrial control systems with configurable load connections and reset I/O routing.

Technical Context

The board implements zero-crossing detection and phase-angle firing control using the ST7ULTRALITE's PA5 (zero-cross input), PA4 (TRIAC gate drive), and PA2 (adjustable timing output), synchronized to AC line frequency automatically detected as 50 Hz or 60 Hz. It supports three physical load configurations: series lamp, parallel lamp, and motor control.

EMI suppression is achieved via a tunable LC filter (L1 = 0.1 mH / 5 A, C7 = 470 nF, C9 = 100 nF) and snubber network (R4 = 47 Ω, C8 = 2.2 nF), meeting Class A conducted emissions limits per EN61000-3-2. Power is derived directly from 275 VAC mains through a capacitive dropper and 5.6 V Zener clamp.

Key Specifications

Availability

STEVAL-ILL004V2 is available at Aetrix Electronics and suitable for home appliance development, industrial motor control prototyping, and lighting dimmer design requiring stable component supply despite its obsolete status.

Supply support for STEVAL-ILL004V2 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 devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

This board belongs to ST's STEVAL (ST Evaluation) family, developed specifically to accelerate validation of AC power control architectures using ST's proprietary microcontrollers and power switches.

FAQ

Is STEVAL-ILL004V2 still in production?

No. STMicroelectronics has marked STEVAL-ILL004V2 as obsolete, with no new manufacturing planned. Aetrix Electronics maintains limited legacy stock for design continuity and repair support, subject to availability verification prior to order placement.

What microcontroller is used on this board?

The board uses the ST7ULTRALITE 8-pin microcontroller (part number not specified on schematic but confirmed by pinout: Vdd, Vss, PA1–PA5, RESET, AIN0, IO1). It provides zero-cross detection on PA5, TRIAC gate drive on PA4, and configurable timing output on PA2.

Can this board drive inductive loads like motors?

Yes. The board supports mono-phase motor control via its parallel configuration mode, using the ACST67S TRIAC and optimized snubber (R4/C8) and EMI filter (L1/C7/C9) to manage inductive kickback and conducted noise during motor switching.

Does it support both leading- and trailing-edge dimming?

No. STEVAL-ILL004V2 implements only leading-edge (phase-angle) dimming, consistent with standard TRIAC-based AC control. It lacks the MOSFET+optocoupler architecture required for trailing-edge (ELV) compatibility.