STMicroelectronics STEVAL-ILL022V1

Overview

STEVAL-ILL022V1 from STMicroelectronics is a fully assembled, tested evaluation board for solar-powered LED street lighting systems, integrating an 80 W MPPT solar charger and a 25 W constant-current LED driver based on the STM32 microcontroller. It supports automatic 12 V/24 V battery adaptation, day/night/weather detection, AC mains fallback, and full protection (OTP/OCP/UVP).

For engineers reviewing the STEVAL-ILL022V1 datasheet, STEVAL-ILL022V1 pinout, STEVAL-ILL022V1 application, or STEVAL-ILL022V1 equivalent, this board enables rapid validation of solar-charged, battery-backed LED streetlight control architecture with integrated system monitoring and fault management.

Technical Context

The board implements dual-function control: an STM32-based MPPT algorithm dynamically adjusts solar panel operating voltage to maximize power harvest under varying irradiance and temperature, while simultaneously managing battery charge profiles (bulk/absorption/floating) for lead-acid or Li-ion chemistries. The LED driver delivers precise constant current up to 700 mA with dimming capability.

System-level intelligence includes ambient light sensing for automatic dusk-to-dawn operation, weather persistence logic to trigger AC mains switchover after multi-day low-sun conditions, and real-time thermal, overvoltage, and overcurrent fault detection with debug LED indicators.

Key Specifications

Availability

STEVAL-ILL022V1 is available at Aetrix Electronics and suitable for solar-powered street lighting, off-grid rural illumination, emergency pathway lighting, and municipal smart city pilot deployments requiring stable component supply and field-proven reference design validation.

Supply support for STEVAL-ILL022V1 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, sensors, and analog/mixed-signal devices for industrial, automotive, and consumer applications.

This board belongs to ST's STEVAL (ST Evaluation) series-engineered to accelerate prototyping and system integration of energy-efficient, intelligent power management solutions for sustainable infrastructure.

FAQ

What microcontroller is used on STEVAL-ILL022V1?

The board uses an STM32F103C8T6 32-bit ARM Cortex-M3 MCU running custom firmware that implements MPPT control, battery charging algorithms, LED current regulation, and system supervision-all pre-flashed and ready for immediate evaluation without programming tools.

Does STEVAL-ILL022V1 support both lead-acid and lithium-ion batteries?

Yes-it automatically detects battery type and configures appropriate charge profiles: three-stage (bulk/absorption/float) for lead-acid and CC/CV with voltage cutoff for lithium-ion, with configurable thresholds accessible via onboard jumpers and firmware parameters.

Can the LED dimming behavior be customized?

Yes-dimming is implemented via PWM-controlled constant current, and the default night-duration mode (e.g., full brightness for 6 hours, then 30% for remainder) can be adjusted using jumper settings or by reprogramming the STM32 with ST's official toolchain and provided source code.

Is AC mains fallback manually configurable or fully automatic?

Fully automatic-the board continuously monitors battery voltage, solar input, and ambient light; when battery state-of-charge falls below user-defined thresholds after ≥48 hours of insufficient solar harvest, it seamlessly switches load to AC mains without interruption to LED output.