STMicroelectronics STEVAL-ILB009V1

Overview

STEVAL-ILB009V1 from STMicroelectronics is a demonstration board implementing a 2 × 28 W electronic fluorescent lamp ballast with active power factor correction (PFC), based on the STD3N62K3 MOSFET and STD845DN40 BJT. It integrates a PFC stage and self-oscillating half-bridge converter, operates from 180–264 V_AC, delivers 400 V nominal output, and achieves ~90% efficiency at 0.99 power factor.

For engineers reviewing the STEVAL-ILB009V1 datasheet, STEVAL-ILB009V1 pinout, STEVAL-ILB009V1 application, or STEVAL-ILB009V1 equivalent, this board serves as a validated reference for compact, cost-optimized lighting systems requiring low THD, high PF, and compliance with IEC 61000-3-2 Class C limits.

Technical Context

The board implements a two-stage architecture: a boost-type active PFC controller driving the STD3N62K3 MOSFET, followed by a self-oscillating half-bridge inverter using the STD845DN40 BJT pair to drive parallel 28 W lamps. Input rectification supports universal AC input (180–264 V_AC, 50/60 Hz) with ±15% tolerance around 230 V_rms.

Key timing and regulation functions are embedded in analog circuitry-no microcontroller or programmable IC is used. The PFC section targets >0.99 power factor and <10% THD, while the half-bridge operates above 35 kHz to avoid audible noise and enable compact magnetics.

Key Specifications

Availability

STEVAL-ILB009V1 is available at Aetrix Electronics and suitable for fluorescent lamp ballast development, lighting OEM prototyping, and energy-efficient commercial lighting system validation requiring stable component supply and documented reference design performance.

Supply support for STEVAL-ILB009V1 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, sensors, and analog ICs for industrial, automotive, and consumer applications.

This board belongs to ST's STEVAL (ST Evaluation) series-reference designs intended to accelerate adoption of ST power semiconductors and analog building blocks in real-world lighting, power conversion, and motor control applications.

FAQ

What is the primary function of the STEVAL-ILB009V1 board?

The STEVAL-ILB009V1 is a complete, assembled demonstration board for a 2 × 28 W electronic fluorescent lamp ballast. Its core function is to validate ST's active PFC + self-oscillating half-bridge topology using the STD3N62K3 MOSFET and STD845DN40 BJT, delivering high power factor, low THD, and >90% efficiency without digital control.

Can STEVAL-ILB009V1 drive lamps other than 28 W fluorescent tubes?

It is specifically tuned for two parallel 28 W T8 or T5 fluorescent lamps. Driving higher-wattage or different lamp types (e.g., LED, HID) requires redesign of the resonant tank, feedback network, and protection thresholds-no built-in configuration jumpers or firmware options exist for alternate lamp loads.

Does the board include safety isolation between AC input and lamp output?

Yes-the design incorporates reinforced insulation between the AC input stage and the high-voltage lamp output circuit, complying with EN 61347-2-3 and EN 61000-3-2. Creepage and clearance distances meet Class II requirements, and the half-bridge output is floating relative to earth ground.

Is firmware or software required to operate STEVAL-ILB009V1?

No. The board uses fully analog control: the PFC stage relies on ST's proprietary fixed-frequency continuous conduction mode (CCM) controller IC (not disclosed in public docs), and the half-bridge is self-oscillating via base-drive transformer feedback. No MCU, programming, or external configuration is needed.