STMicroelectronics EVL150W-HVSL

Overview

EVL150W-HVSL from STMicroelectronics is an evaluation board for a 150 W, 1 A high-voltage LED driver targeting street lighting applications. It implements a two-stage architecture with a transition-mode PFC pre-regulator and an LCC resonant half-bridge converter, both controlled by the integrated STCMB1 combo IC. Key confirmed specs include 90–264 Vac universal input, 150 V / 1 A continuous output, >91% full-load efficiency, <0.5 W no-load consumption, and EN55022 Class-C conducted EMC compliance.

For engineers reviewing the EVL150W-HVSL datasheet, EVL150W-HVSL pinout, EVL150W-HVSL application, or EVL150W-HVSL equivalent, this board serves as a reference design for high-reliability, electrolytic-capacitor-free LED drivers requiring analog/PWM/resistive dimming down to 1% current, auto-restarting protections, and EN60950 safety certification.

Technical Context

The board uses STMicroelectronics' STCMB1 SO20W controller, which integrates a transition-mode PFC controller and a half-bridge resonant (HBR) controller in one die-enabling precise constant-current and constant-voltage regulation via dual feedback loops. The LCC tank topology is specifically selected over LLC to optimize current-source behavior for LED string driving.

Protections include LED short-circuit, open-string, and regulation loop failure detection, all implemented with auto-restart functionality. Dimming support covers analog (0–10 V), resistive (potentiometer), and flicker-free PWM (open-collector, 1–100% duty cycle), with current regulation maintained continuously even at 1% PWM duty.

Key Specifications

Availability

EVL150W-HVSL is available at Aetrix Electronics and suitable for street lighting, industrial area lighting, and smart city infrastructure projects requiring stable component supply, rapid prototyping validation, and production-ready reference design transfer.

Supply support for EVL150W-HVSL 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 silicon solutions for automotive, industrial, and consumer markets.

The EVL150W-HVSL belongs to ST's LED lighting evaluation platform family, engineered to accelerate development of high-efficiency, safety-certified, and dimming-flexible AC/DC LED drivers for outdoor and high-power applications.

FAQ

What is the primary function of the STCMB1 IC on this board?

The STCMB1 is a single-chip combo controller integrating a transition-mode PFC controller and a half-bridge resonant (LCC) controller. It manages both power stages synchronously to achieve high efficiency, low THD, and tight CC/CV regulation without auxiliary supplies-eliminating the need for a separate Viper-like SMPS.

Does the board support standalone operation without external microcontroller control?

Yes. EVL150W-HVSL operates autonomously with built-in analog, resistive, and open-collector PWM dimming interfaces. No host MCU is required-dimming signals are directly accepted at JP1B pins, and protection responses (e.g., LED open/short) trigger automatic restart without firmware intervention.

Are electrolytic capacitors used in the power path?

No. The design intentionally omits electrolytic capacitors in the main power train-including bulk input and output stages-relying instead on film (X2/Y1) and ceramic capacitors. This eliminates lifetime-limiting wear-out mechanisms and ensures >50,000-hour reliability under thermal stress.

Can this board drive multiple parallel LED strings?

It is configured as a single-string constant-current source (150 V / 1 A). Driving parallel strings would require external current-sharing circuitry or redesign of the sense and feedback network; the board's CC loop and protection logic are calibrated for one string only.