STMicroelectronics STEVAL-LLL006V1

Overview

STEVAL-LLL006V1 from STMicroelectronics is an evaluation board for high-power smart LED street lighting, integrating the HVLED001A LED controller, STP21N90K5 900 V MOSFET, and STM32L071KZ microcontroller with embedded SPSGRFC sub-1 GHz transceiver. It delivers constant current (0.7 A) across 60–110 VDC output, achieves >0.97 power factor and <15% THD, and supports five-level analog dimming and remote on/off/dimming via 6LoWPAN mesh networking.

For engineers reviewing the STEVAL-LLL006V1 datasheet, STEVAL-LLL006V1 pinout, STEVAL-LLL006V1 application, or STEVAL-LLL006V1 equivalent, this board serves as a complete reference for outdoor smart lighting system validation - including AC-DC conversion, thermal foldback protection, wireless command reception, and low-standby (<0.5 W) operation compliant with EnergyStar.

Technical Context

The board implements a quasi-resonant flyback topology using the HVLED001A controller, which regulates output current via primary-side sensing and ZCD-based timing, enabling high efficiency (>89% peak) without secondary-side feedback components. Input voltage range (90–300 VAC) and wide output compliance (60–110 VDC) support global mains compatibility and multi-string LED configurations.

The STM32L071KZ MCU executes local control logic, processes analog dimming inputs, reads thermal sensors (NTC), and interfaces with the SPSGRFC transceiver to receive and relay 6LoWPAN-compliant commands. The VIPER012LS auxiliary supply powers the control circuitry with fixed-frequency operation and integrated high-voltage startup.

Key Specifications

Availability

STEVAL-LLL006V1 is available at Aetrix Electronics and suitable for outdoor smart street lighting, municipal IoT infrastructure projects, and industrial LED driver reference design validation requiring stable component supply, full regulatory documentation, and long-term evaluation board availability.

Supply support for STEVAL-LLL006V1 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 analog products for industrial, automotive, and consumer applications.

This board belongs to ST's Lighting & Power Conversion Evaluation Platform product line, developed specifically to accelerate adoption of intelligent, standards-compliant, wirelessly managed LED drivers for smart city infrastructure.

FAQ

What wireless protocol does STEVAL-LLL006V1 use for remote control?

The board uses a proprietary 6LoWPAN-over-sub-1 GHz mesh network implemented via the SPSGRFC transceiver and STM32L071KZ MCU. It communicates with the ST-developed Data Concentrator Unit (DCU) and the ST 6LoWPAN Smart Streetlight Android app - no Bluetooth or Wi-Fi stack is involved in the core lighting control path.

Does STEVAL-LLL006V1 support digital dimming protocols like DALI or 0–10 V?

No - it supports only five-level analog dimming via onboard potentiometer or external DC voltage input (0–3.3 V). DALI, 0–10 V, or PWM dimming are not implemented; dimming commands are received exclusively over the sub-1 GHz RF link as discrete level instructions.

Can the HVLED001A controller operate in continuous conduction mode (CCM)?

No - the HVLED001A is designed exclusively for quasi-resonant (QR) and discontinuous conduction mode (DCM) flyback operation. Its ZCD pin and internal timing architecture do not support CCM control; the board's transformer and layout are optimized for QR operation across full line/load range.

Is the auxiliary power supply isolated from the main LED output?

Yes - the VIPER012LS-based auxiliary supply provides galvanically isolated 3.3 V and 12 V rails for MCU, transceiver, and sensing circuits. Isolation is achieved via a dedicated auxiliary winding on the main flyback transformer (T2), meeting reinforced insulation requirements per IEC 61347-1.