STMicroelectronics STEVAL-LLL012V1

Overview

STEVAL-LLL012V1 from STMicroelectronics is a smart LED driver reference design comprising a 35 W high-power-factor flyback power board and a BLE Mesh connectivity board. It delivers constant current (0.7 A) across 24–48 V LED strings, achieves >90% efficiency and <0.3 W standby consumption, and supports remote on/off and 10–100% PWM dimming via Bluetooth Low Energy for indoor smart home lighting.

For engineers reviewing the STEVAL-LLL012V1 datasheet, STEVAL-LLL012V1 pinout, STEVAL-LLL012V1 application, or STEVAL-LLL012V1 equivalent, this reference design enables rapid evaluation of integrated AC-DC LED driving with certified BLE Mesh interoperability, THD <15%, PF >0.95, and programmable BlueNRG-M2SP-based control.

Technical Context

The power board implements primary-side regulation using the HVLED001B controller in an HPF flyback topology, eliminating optocoupler dependency while maintaining precise CC output and ultra-low no-load power. It integrates THD optimization circuitry and uses STD10LN80K5 MDmesh™ K5 MOSFET for high-voltage switching efficiency.

The connectivity board hosts the BlueNRG-M2SP module, providing BLE Mesh networking capability compliant with SIG specifications. It interfaces directly to the power board via J12 (4-pin header), accepting 3.3 V supply (pin 1), GND (pin 4), enable/disable (pin 3), and PWM dimming (pin 2) signals - all managed by firmware STSW-LLL012FW.

Key Specifications

Availability

STEVAL-LLL012V1 is available at Aetrix Electronics and suitable for smart home lighting, commercial indoor luminaires, and IoT-connected retrofit LED drivers requiring stable component supply, BLE Mesh certification, and high-efficiency AC-DC conversion.

Supply support for STEVAL-LLL012V1 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, sensors, and wireless solutions for industrial, automotive, and consumer applications.

This reference design belongs to ST's Lighting & Power Conversion product line, developed specifically to accelerate adoption of standards-compliant, mesh-networked LED drivers for intelligent building and residential automation systems.

FAQ

What firmware is required to operate the STEVAL-LLL012V1?

The STEVAL-LLL012V1 requires STSW-LLL012FW firmware, preloaded on the BlueNRG-M2SP module. This firmware implements the SIG Mesh model layer, enabling interoperability with ST's BLE Mesh mobile app and third-party provisioners supporting Generic OnOff and Light Lightness models.

Does the STEVAL-LLL012V1 support DALI or 0–10 V analog dimming?

No. The STEVAL-LLL012V1 supports only BLE Mesh-based digital dimming via PWM signal injection (J12 pin 2) and on/off control (J12 pin 3). It does not include hardware or firmware for DALI, 0–10 V, or phase-cut dimming interfaces.

Can the power board be used independently without the connectivity board?

Yes. The power board operates as a standalone 35 W HPF LED driver when powered from 90–305 VAC. J12 pins 3 (EN) and 2 (DIM) default to logic-high and open-circuit respectively, enabling full-output operation without BLE control.

What safety certifications does the STEVAL-LLL012V1 hold?

The STEVAL-LLL012V1 reference design complies with IEC/EN 62368-1 (safety) and IEC/EN 61000-3-2 Class C (harmonics). It is not a certified end-product but serves as a pre-validated platform meeting key regulatory thresholds for CE and UKCA marking of final luminaires.