STMicroelectronics STEVAL-ILL004V1

Overview

STEVAL-ILL004V1 from STMicroelectronics is an evaluation board for universal AC motor speed control and leading-edge light dimming using phase-angle adjustment with a TRIAC and the ST7FLITE09 16-pin 8-bit microcontroller. It supports 110–240 V_AC, 50/60 Hz inputs, implements zero-crossing detection (ZCD), capacitive power supply (330 nF), and offers push-button or potentiometer-based user interface. It targets cost-sensitive home appliance motor control (e.g., vacuum cleaners, ventilators) and resistive lighting loads.

For engineers reviewing the STEVAL-ILL004V1 datasheet, STEVAL-ILL004V1 pinout, STEVAL-ILL004V1 application, or STEVAL-ILL004V1 equivalent, this page delivers verified hardware architecture, jumper-configurable control modes, EMI-compliant design practices per EN55014/EN55015, and real-world thermal and power supply constraints for rapid prototyping of TRIAC-driven AC loads.

Technical Context

The board implements phase-angle control via software-timed TRIAC firing synchronized to zero-crossing events detected on PA0. The ST7FLITE09 executes auto-reload timer routines to generate precise conduction angles, supporting both motor speed regulation (via potentiometer analog input on AIN0) and lamp dimming (via push-button toggling).

It integrates a capacitive power supply delivering up to 9.5 mA at 230 V_AC, ZCD circuitry (R1/R2/C2), direct high-sink GPIO drive (up to 20 mA per port, 60 mA in parallel), and provisions for EMI filtering (C7/L1/C9 Π-filter), snubberless TRIAC support (e.g., ACST8-8C), and optional NTC-based temperature monitoring.

Key Specifications

Availability

STEVAL-ILL004V1 is available at Aetrix Electronics and suitable for universal motor speed control in vacuum cleaners, light dimming in residential lamps, heating control in coffee machines, and ventilation fan regulation requiring stable component supply during legacy design validation and educational use.

Supply support for STEVAL-ILL004V1 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, specializing in microcontrollers, power devices, and analog ICs for industrial, automotive, and consumer applications.

The STEVAL-ILL004V1 belongs to ST's STEVAL evaluation board family, designed to accelerate development of cost-optimized, EMI-compliant AC load control systems using ST's proprietary microcontrollers and snubberless TRIACs.

FAQ

What is the primary function of the STEVAL-ILL004V1 evaluation board?

The STEVAL-ILL004V1 is a reference design platform for implementing phase-angle AC load control using a TRIAC and the ST7FLITE09 microcontroller. It demonstrates universal motor speed regulation (e.g., in vacuum cleaners) and leading-edge light dimming (e.g., incandescent lamps), with hardware provisions for zero-crossing detection, capacitive power supply, EMI filtering, and user interface selection via jumper S2.

Can the STEVAL-ILL004V1 be used with 110 V AC mains?

Yes - the board supports 110–240 V_AC, 50/60 Hz inputs. Its capacitive power supply uses C4 = 330 nF to deliver 5.6 mA at 110 V_AC, sufficient for the ST7FLITE09's 350 µA halt mode and active operation. Load brightness or motor torque scales with input voltage, requiring software calibration for consistent performance across voltage ranges.

How is zero-crossing detection implemented on this board?

Zero-crossing detection uses a resistive divider (R1 = R2 = 160 kΩ) and C2 = 100 pF feeding the PA0 pin of the ST7FLITE09. This passive network conditions the mains waveform into a clean digital edge synchronized to each AC zero crossing, enabling precise software-controlled TRIAC firing delays with ±1° timing stability across line cycles.

Is the STEVAL-ILL004V1 still in production?

No - STMicroelectronics discontinued the STEVAL-ILL004V1 in favor of the improved STEVAL-ILL004V2, which replaces the ST7FLITE09 with the smaller 8-pin ST7ULTRALITE microcontroller. The original board remains available through authorized distributors for legacy design support, but no new manufacturing runs are planned.