STMicroelectronics STEVAL-ILD002V1

Overview

STEVAL-ILD002V1 from STMicroelectronics is a 20 W dimmable compact fluorescent lamp (CFL) ballast evaluation board based on the L6574 ballast controller IC, two STD4NK50Z SuperMESH™ MOSFETs, and STTH1L06 ultrafast rectifiers. It supports E27-lamp base, 180–264 VAC input, 20%–100% triac-compatible dimming, >80% efficiency, and delivers 1300 lm output.

For engineers reviewing the STEVAL-ILD002V1 datasheet, STEVAL-ILD002V1 pinout, STEVAL-ILD002V1 application, or STEVAL-ILD002V1 equivalent, this board enables rapid validation of dimmable CFL ballast designs targeting Class A energy labeling, residential lighting retrofits, and legacy triac-dimmer compatibility without lamp or dimmer replacement.

Technical Context

The board implements a resonant half-bridge topology driven by the L6574 high-voltage ballast controller, which integrates oscillator, driver, and protection circuitry for electronic CFL ballasts. It uses two STD4NK50Z 500 V/4 A SuperMESH™ MOSFETs in push-pull configuration with Zener-protected gate drive and soft-start control.

Input rectification employs dual STTH1L06 600 V/1 A Turbo 2 ultrafast diodes; resonant tank includes Lr = 2.8 mH, Cr = 5.6 nF/1200 V, and lamp ignition capacitor Cb = 100 nF/400 V. Dimming is achieved via phase-cut AC sensing and L6574's frequency-modulated control loop.

Key Specifications

Availability

STEVAL-ILD002V1 is available at Aetrix Electronics and suitable for residential lighting retrofits, LED/CFL hybrid dimming systems, and energy compliance testing requiring stable component supply and documented reference design validation.

Supply support for STEVAL-ILD002V1 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 devices, analog ICs, and sensor solutions for industrial, automotive, and consumer markets.

The STEVAL series comprises ST's official evaluation and demonstration platforms-engineered to accelerate design-in of ST's analog, power, and interface products in real-world lighting, motor control, and power conversion applications.

FAQ

Is STEVAL-ILD002V1 still in production?

No. STEVAL-ILD002V1 is marked as Obsolete in ST's official documentation (Rev 1, June 2008). It is no longer manufactured or supported with new silicon, but legacy units remain available through authorized distributors and Aetrix Electronics' extended-life inventory program for design continuity and repair use.

Can STEVAL-ILD002V1 drive LED lamps?

No. The board is specifically designed for 20 W compact fluorescent lamps with E27 base and resonant half-bridge ignition. Its L6574 controller, resonant tank values (Lr = 2.8 mH, Cr = 5.6 nF), and lamp voltage/current profile are not compatible with LED load characteristics or constant-current regulation requirements.

What dimmer types are compatible with this board?

STEVAL-ILD002V1 is validated for leading-edge (triac-based) domestic dimmers only. It does not support trailing-edge (ELV) or digital (DALI, 0–10 V) dimming. Dimming performance requires minimum load ≥20 W and dimmer rating ≥60 W to ensure reliable conduction angle detection and zero-crossing stability.

Where can I find the schematic and bill of materials?

The full schematic (Figure 1), BOM, and layout details are provided in the original STMicroelectronics Data Brief (Doc ID 15090, Rev 1, June 2008), available via ST's archive portal and mirrored in Aetrix Electronics' technical library with annotated component cross-references and obsolete-part mitigation notes.