STMicroelectronics EVAL-IBD002-35W

Overview

EVAL-IBD002-35W from STMicroelectronics is a demonstration board implementing an inverse buck LED driver topology using the HVLED002 controller, delivering up to 35 W output with 700 mA maximum current, 24–48 Vdc adjustable LED voltage, and mixed analog/PWM dimming (1–100%). It operates from 48–60 Vdc main input and requires 15 Vdc auxiliary supply, targeting industrial and architectural LED lighting systems.

For engineers reviewing the EVAL-IBD002-35W datasheet, EVAL-IBD002-35W pinout, EVAL-IBD002-35W application, or EVAL-IBD002-35W equivalent, this board enables rapid validation of HVLED002-based inverse buck designs for high-efficiency, low-ripple constant-current LED drivers with dual-mode dimming control and short-circuit protection.

Technical Context

The board implements a single-stage inverse buck (also known as SEPIC-derived buck-boost) topology optimized for wide-output-voltage LED strings, where the HVLED002 IC regulates LED current via peak-current-mode control synchronized to an external RT/CT oscillator. Output voltage range (24–48 Vdc) is set by feedback resistor dividers connected to the VFB pin.

Dimming is implemented through two independent paths: analog dimming (0–10 V input applied to DIM pin, scaling current linearly from 100% to 10%) and PWM dimming (external 100–500 Hz signal applied to same DIM pin, enabling 10%–1% current modulation). Auxiliary 15 Vdc powers the controller's internal LDO and bias circuitry.

Key Specifications

Availability

EVAL-IBD002-35W is available at Aetrix Electronics and suitable for LED lighting development, industrial luminaire prototyping, and architectural lighting system validation requiring stable component supply and reference-grade dimming performance.

Supply support for EVAL-IBD002-35W 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 management ICs, sensors, and analog products for automotive, industrial, and consumer applications.

This evaluation board belongs to ST's LED lighting solutions portfolio, specifically engineered to demonstrate the HVLED002 controller's capability in high-efficiency, single-stage inverse buck topologies for constant-current LED drivers with flexible dimming interfaces.

FAQ

What input voltage sources are compatible with EVAL-IBD002-35W?

The board requires two separate DC supplies: a main input of 48–60 Vdc connected to J1 VIN terminals, and an isolated 15 Vdc auxiliary supply connected to J2 for powering the HVLED002 controller. Using only the main input without 15 Vdc will prevent controller startup and cause no LED output.

How does dimming work on this board?

Dimming uses a shared 0–10 V analog input (J6) that supports two modes: applying a DC voltage between 1–10 V enables analog dimming (100–10% current), while applying a 100–500 Hz PWM signal enables fine-resolution PWM dimming (10–1% current). The HVLED002 automatically detects mode based on signal characteristics.

Is EVAL-IBD002-35W RoHS compliant?

Yes - the board is fully RoHS compliant per EU Directive 2011/65/EU, with all components, PCB finish, and assembly materials meeting lead-free and hazardous-substance restrictions. This is confirmed in the official DB4128 data brief (Rev 1, February 2020).

Can the output voltage range be extended beyond 48 Vdc?

No - the board's component selection (including Q1 STL4N10F7, D1/D5 STPS2H100AF, and L1 ELC12D561E) and HVLED002's internal overvoltage protection threshold limit safe operation to ≤48 Vdc output. Extending beyond requires redesigning the feedback divider, MOSFET, diode, and inductor ratings.