AN4291 datasheet(1/53 Pages) STMICROELECTRONICS

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AN4291 Datasheet(PDF) 1 Page - STMicroelectronics

Part #	AN4291

Description	STEVAL385LED4CH: four independent high brightness LED

PDF	53 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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June 2013

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AN4291

Application note

STEVAL385LED4CH: four independent high brightness LED

channels using the STLUX385A digital controller

Introduction

The STEVAL385LED4CH demonstration board is a complete and configurable solution to

manage four independent high brightness LED channels using the STLUX385A digital

controller, which embeds advanced peripherals tailored to generate high resolution PWM

signals. The LED current is independently regulated by the fixed-off-time (FOT) principle on

each channel.

This document describes how to use the STEVAL385LED4CH board, the hardware and the

firmware implemented on the board as well as the relevant measurements. The

STLUX385A shipped with this board has already been programmed with firmware tailored

for the STEVAL385LED4CH application and the source code is available.

The following picture gives an overview of the demonstration board diagram.

Figure 1. Demonstration board diagram

Channel 1

Channel 2

Channel 3

Buttons

DALI

STATUS

UART

SWIM

STLUX

Channel 0

Power in

AM16703v1

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