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May 2014

DocID024374 Rev 2

1/10

STEVAL385LED4CH

200 W, digital 4-LED channels demonstration board with

STLUX385A-controlled current regulation and dimming

Data brief

Features

 Based on the STLUX385A digital controller

 Up to 200 W

 4 LED channels

 Adjustable LED current and dimming

 Adaptive voltage compensation

 Real-time fault detection and protection

(e.g: short or open circuit)

 Serial interface

 DALI (optional)

Description

The STEVAL385LED4CH demonstration board is

a complete and configurable solution to manage

four independent high-brightness LED channels

using the STLUX385A digital controller. The

STLUX™ product family and embeds advanced

peripherals tailored to generate high resolution

PWM signals (SMED).

The STEVAL385LED4CH device implements

inversed buck topology to drive each LED

channel. The SMED technology integrated in the

STLUX385A device regulates the LED current,

exploiting the fixed-off-time (FOT) principle. Each

channel can output current in the range of

250 mA to 1 A.

The number of LEDs, the current and the PWM

dimming working point can be set through the

command interpreter, accessible via the serial

interface. Dimming can also be manually adjusted

via the three on-board buttons.

The demonstration board can be optionally

controlled via a DALI interface. The DALI

connection board is available separately (part

number STEVAL-ILM001V1). The STLUX385A

DALI software drivers and application firmware

are available.

This demonstration board is available also with an

order code STEVAL-ILL057V1.

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