STMicroelectronics EVL80WLED-STCH03

Overview

EVL80WLED-STCH03 from STMicroelectronics is an 80 W, 1 A primary-side controlled LED driver demonstration board designed for street lighting applications. It implements a fixed-current source with 40–80 V output voltage range, <50 mA output current ripple, >90% full-load efficiency at 230 V_AC, and fast startup (<300 ms), operating across universal AC input (90–265 V_AC, 45–66 Hz).

For engineers reviewing the EVL80WLED-STCH03 datasheet, EVL80WLED-STCH03 pinout, EVL80WLED-STCH03 application, or EVL80WLED-STCH03 equivalent, this evaluation board enables rapid validation of STCH03-based primary-side regulation in outdoor LED luminaires requiring high PF (>0.9), low THD (<5%), short-circuit/open-LED auto-restart protection, and EN61000-3-2 Class-C compliance.

Technical Context

The EVL80WLED-STCH03 uses ST's STCH03 controller IC to implement primary-side constant-current regulation-eliminating secondary-side feedback components and simplifying transformer design. Its control loop directly senses reflected primary winding voltage to regulate LED current without optocouplers or secondary shunt regulators.

It integrates active power factor correction and meets EN55022 Class B conducted emissions limits. Protection features include auto-restart on LED open-circuit and short-circuit faults, plus <0.5 W no-load power consumption at 230 V_AC, enabling compliance with energy-saving requirements for outdoor lighting.

Key Specifications

Availability

EVL80WLED-STCH03 is available at Aetrix Electronics and suitable for street lighting, smart city LED infrastructure, and outdoor area illumination requiring stable component supply, regulatory-compliant driver validation, and rapid prototyping of primary-side-controlled LED systems.

Supply support for EVL80WLED-STCH03 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, analog chips, and sensors for industrial, automotive, and consumer applications.

This board belongs to ST's LED Lighting Evaluation Kit product line, developed specifically to accelerate adoption of their proprietary primary-side control ICs (e.g., STCH03) in cost-sensitive, high-reliability outdoor lighting designs.

FAQ

Is EVL80WLED-STCH03 a production-ready LED driver or only for evaluation?

EVL80WLED-STCH03 is a demonstration board intended solely for evaluation and reference design purposes-not certified for end-product use. It provides validated schematics, layout, and bill-of-materials to guide custom driver development using the STCH03 controller. Final products require full safety, EMI, and reliability certification per regional standards.

Does this board support dimming functionality?

No, the EVL80WLED-STCH03 implements fixed-output-current operation only and does not include analog or PWM dimming circuitry. Dimming capability would require external signal injection into the STCH03's DIM pin and corresponding modifications to the feedback network-details are provided in ST's STCH03 datasheet and application note AN4729.

What safety and EMC standards does EVL80WLED-STCH03 comply with?

The board complies with EN61000-3-2 Class-C (harmonic current emissions), EN55022 Class B (conducted emissions), and references EN60065 for basic insulation and creepage/clearance. It is not certified to UL/IEC 62368-1 or other end-equipment safety standards-those apply only to final luminaires incorporating properly certified drivers.

Can EVL80WLED-STCH03 drive multiple parallel LED strings?

No-it is designed for a single series-connected LED string (40–80 V, 1 A). Driving parallel strings would cause current imbalance due to forward-voltage mismatches and is not supported by the primary-side sensing architecture. For multi-string configurations, separate constant-current channels or secondary-side regulation are required.