STMicroelectronics STEVAL-ILL070V4

Overview

STEVAL-ILL070V4 from STMicroelectronics is a 35 W, dimmable, single-string LED driver evaluation board based on the HVLED001A controller and STF10LN80K5 MOSFET. It delivers 700 mA constant current across 24–48 V LED strings, supports universal AC input (90–305 V_rms, 45–66 Hz), and implements dual dimming via 0–10 V analog and PWM interfaces with >90% full-load efficiency and open-load voltage limiting at 52.4 V.

For engineers reviewing the STEVAL-ILL070V4 datasheet, STEVAL-ILL070V4 pinout, STEVAL-ILL070V4 application, or STEVAL-ILL070V4 equivalent, this board serves as a validated reference design for high-PF, low-THD offline LED drivers targeting commercial and industrial lighting systems requiring robust overvoltage, overload, and thermal protection with auxiliary 12 V/2 mA and optional 3.3 V/0.1 A regulation.

Technical Context

The board implements a flyback topology with primary-side regulation using the HVLED001A quasi-resonant controller, enabling accurate constant-current control without secondary-side feedback components. Protection features include auto-restart on output overload/open-circuit, fast V_OUT discharge at turn-off, and integrated surge handling via ZCD, TOFF, and HVSU pins.

Dimming is implemented through isolated analog (0–10 V) and opto-coupled PWM paths, with configurable logic polarity and frequency range (200 Hz–1 kHz). An optional remote turn-off input and unregulated auxiliary output (Reg_in/Reg_out) support IoT expansion modules such as BLE or Wi-Fi dongles.

Key Specifications

Availability

STEVAL-ILL070V4 is available at Aetrix Electronics and suitable for commercial LED troffers, industrial high-bay fixtures, smart streetlight controllers, and IoT-integrated luminaires requiring stable component supply and pre-validated safety-compliant reference designs.

Supply support for STEVAL-ILL070V4 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/mixed-signal devices for automotive, industrial, and consumer applications.

This board belongs to ST's STEVAL lighting evaluation platform family, engineered to accelerate development of energy-efficient, standards-compliant LED drivers with integrated protection, dimming flexibility, and auxiliary power for next-generation intelligent lighting systems.

FAQ

What dimming methods does the STEVAL-ILL070V4 support?

The board supports two independent dimming interfaces: a 0–10 V analog input (J3.2 referenced to J3.3 GND) and an opto-isolated PWM input (J4.2) with 3.3–5 V amplitude and 200 Hz–1 kHz frequency range. Both interfaces scale output current linearly from 100% to 10%, and jumper JP1/JP2 configure logic polarity and isolation mode.

How is output overvoltage and open-circuit protection implemented?

Open-circuit protection limits maximum output voltage to 52.4 V using internal HVLED001A circuitry, preventing hazardous voltages at the LED terminals. The board also discharges the output capacitor rapidly upon shutdown via dedicated discharge path, and enters auto-restart mode during sustained overload or short-circuit conditions.

Can the STEVAL-ILL070V4 power external modules like BLE or Wi-Fi?

Yes - it provides a regulated 12 V / 2 mA output at J3.1 for biasing potentiometers or simple regulators, and supports an optional external linear regulator (via J6 pins 5/3) to generate 3.3 V / 0.1 A. Schematics for both 5 V and 3.3 V auxiliary supplies are included in the reference design documentation.

What protections does the HVLED001A controller provide on this board?

HVLED001A delivers primary-side protections including overvoltage (ZCD monitoring), overcurrent (CS pin sensing), brown-out (VRECT monitoring), and overtemperature (via external NTC on VCC_sec). It also manages burst-mode operation at light loads to maintain high PF and low THD, and triggers automatic restart after fault clearance.