STMicroelectronics STEVAL-ILL051V1

Overview

STEVAL-ILL051V1 from STMicroelectronics is an evaluation board for the LED2000 monolithic step-down DC-DC converter, configured as a 3 A constant-current LED driver with PWM dimming capability, 850 kHz switching frequency, ±7% output current accuracy, and SO-8 Batwing package integration. It targets high-brightness LED lighting systems requiring compact size and thermal robustness.

For engineers reviewing the STEVAL-ILL051V1 datasheet, STEVAL-ILL051V1 pinout, STEVAL-ILL051V1 application, or STEVAL-ILL051V1 equivalent, key selection considerations include input voltage range (3.0–18 V), current sense threshold (100 mV typ), synchronous rectification, thermal shutdown behavior, and compatibility with ceramic output capacitors.

Technical Context

The board implements the LED2000 IC in buck topology with fixed 850 kHz switching to minimize external passive size-enabling use of small XAL6060-22 µH inductor and 2.2 µF/10 µF ceramic output capacitors. Feedback is closed via a 150 mΩ 1% sense resistor setting 3 A output current.

Dimming is achieved through direct PWM signal injection at the DIM pin, while protection includes internal current limiting, thermal shutdown, and output short-circuit resilience. The AGND and PGND separation supports noise-sensitive analog feedback stability.

Key Specifications

Availability

STEVAL-ILL051V1 is available at Aetrix Electronics and suitable for LED street lighting, architectural accent lighting, and automotive exterior lighting requiring stable component supply and rapid prototyping validation.

Supply support for STEVAL-ILL051V1 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, designing and manufacturing microcontrollers, power ICs, sensors, and analog devices for industrial, automotive, and consumer applications.

The STEVAL-ILL051V1 belongs to ST's LED lighting evaluation platform family, engineered to accelerate development of efficient, thermally robust constant-current drivers for high-brightness LED arrays.

FAQ

What is the maximum LED string voltage supported by STEVAL-ILL051V1?

The board supports LED string voltages up to VIN − (V_DS(on) + V_SENSE), limited by the LED2000's 18 V max input and typical 0.4 V switch drop. With 18 V input and 3 A load, usable LED forward voltage is ~17.5 V, accommodating strings of 5–6 white LEDs in series under nominal conditions.

Does STEVAL-ILL051V1 support analog dimming?

No. The board implements only digital PWM dimming via the DIM pin; analog dimming (e.g., DC voltage or resistor-based current adjustment) is not supported by the LED2000 IC or this reference layout. Dimming resolution and linearity depend solely on applied PWM duty cycle and frequency.

Can the output current be adjusted above 3 A?

No. The 150 mΩ sense resistor sets nominal 3 A output (I_OUT = 0.1 V / 0.15 Ω). Lower resistance increases current but exceeds LED2000's safe operating area and thermal limits. ST does not validate or recommend operation beyond 3 A due to junction temperature and inductor saturation risks.

Is the STEVAL-ILL051V1 RoHS compliant?

Yes. As stated in the data brief, the board is RoHS compliant per EU Directive 2011/65/EU. All components-including the LED2000 IC in SO-8 Batwing package, XAL6060 inductor, and 10 µF/2.2 µF ceramic capacitors-meet lead-free soldering and hazardous substance restrictions.