STMicroelectronics EVL012LED

Overview

EVL012LED from STMicroelectronics is an evaluation board for a 200 W wide-input LED driver implementing a two-stage architecture-PFC preregulator followed by resonant half-bridge LLC converter-controlled by the integrated STNRG012 IC. It delivers constant current up to 3.6 A across 36–56 VDC output, achieves >93% efficiency at full load, meets EN61000-3-2 Class-C harmonic limits, and supports analog dimming (0–10 V or 100 kΩ potentiometer) for TV backlighting and outdoor lighting systems.

For engineers reviewing the EVL012LED datasheet, EVL012LED pinout, EVL012LED application, or EVL012LED equivalent, this board serves as a validated reference design for high-efficiency, low-THD (<7.5% from 30–100% load), no-load consumption <0.5 W LED driver implementation with comprehensive protection (OCP, OVP, open-string, brown-in/out) and programmable latched/auto-restart behavior via non-volatile memory configuration.

Technical Context

The EVL012LED implements a digitally controlled two-stage topology: an active PFC front-end using valley-switching control and a resonant LLC half-bridge stage, both managed by the STNRG012 SoC. This integration eliminates external MCU or discrete controller coordination, enabling precise timing alignment between PFC and LLC sections.

Feedback loops enforce dual regulation-constant current (CC) for LED string stability and constant voltage (CV) for auxiliary safety clamping-with independent error amplifiers and optocoupler-isolated loop compensation. Protection thresholds (e.g., LED short-circuit, PFC saturation, LLC capacitive mode) are configurable in non-volatile memory without hardware changes.

Key Specifications

Availability

EVL012LED is available at Aetrix Electronics and suitable for TV LED backlighting, street lighting infrastructure, and industrial high-bay luminaires requiring stable component supply, rapid prototyping validation, and production-ready reference design transfer.

Supply support for EVL012LED 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 specializing in power management, microcontrollers, and analog ICs, with deep expertise in energy-efficient power conversion and industrial-grade reliability.

The EVL012LED belongs to ST's LED driver evaluation platform family, designed to accelerate adoption of digitally controlled, high-PF, low-THD AC/DC LED drivers for demanding architectural, outdoor, and display applications.

FAQ

What is the primary function of the STNRG012 IC on the EVL012LED board?

The STNRG012 integrates both PFC and LLC controller functions into a single SO20 package, managing gate drive timing, loop regulation, and protection logic without external microcontroller intervention. It executes valley-switching PFC control and variable-frequency LLC resonance control, enabling >93% peak efficiency and eliminating inter-stage synchronization components.

Does the EVL012LED support dimming, and how is it implemented?

Yes-it supports analog dimming via two methods: a 0–10 V DC control signal applied to the DIM+ terminal, or a 100 kΩ potentiometer wired across DIM+ and ground. Dimming range extends from 100% down to less than 10% output current, with linear CC reduction maintained across the full output voltage range (36–56 VDC).

What protection features are implemented, and how are they configured?

Protections include input brown-in/out, PFC overvoltage/saturation, LLC capacitive-mode detection, LED output overload/short-circuit, LED string open-circuit, and feedback disconnection. All are configurable as either latched shutdown or auto-restart via parameter values stored in the STNRG012's internal non-volatile memory-no hardware modification required.

Can the EVL012LED be used directly in end-product designs, or is it evaluation-only?

EVL012LED is an evaluation board intended for design verification and reference implementation-not certified for direct end-product use. Its PCB layout, thermal design (210×55×15 mm), and component selection (e.g., dual-layer FR-4, 35 μm copper) provide a production-proven foundation, but final product certification (safety, EMC) requires full system-level validation per EN60950 and EN55022.