AN2983 datasheet(1/32 Pages) STMICROELECTRONICS

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AN2983 Scheda tecnica(PDF) 1 Page - STMicroelectronics

Il numero della parte	AN2983

Spiegazioni elettronici	Constant current inverse buck LED driver using L6562A

PDF	32 Pages

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Produttore elettronici	STMICROELECTRONICS [STMicroelectronics]

Homepage	http://www.st.com

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1 / 32 page

December 2009

Doc ID 15679 Rev 1

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AN2983

Application note

Constant current inverse buck LED driver using L6562A

Introduction

Whenever a lighting application, such as street lighting for example, requires an elevated

number of LEDs, there are basically two solutions: the first is to connect all the diodes in

series in a single "string"; the second is to place several strings in parallel with fewer

elements in each one.

The first solution, even if simpler, poses stringent safety requirements due to the high supply

voltage. The latter needs a lower input voltage but the current through each string has to be

independently controlled.

Since, from a system point of view, the second solution seems more viable, we have

developed an application to investigate the possibility of employing an L6562A to implement

such a constant current controller. This document describes the EVL6562A-LED

demonstration board and summarizes the relevant results obtained.

Figure 1.

EVL6562A-LED: L6562A constant current inverse buck driver module

www.st.com

Produttore elettronici	Il numero della parte	Scheda tecnica	Spiegazioni elettronici
STMicroelectronics	AN2982	1Mb / 31P	This application note describes the STEVAL-ILB005V2 demonstration board equipped with the L6585DE lighting controller 15-Mar-2010
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	AN2985	1Mb / 19P	The STEVAL-IFP010V3 demonstration board has been developed 07-Nov-2012
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Produttore elettronici	Il numero della parte	Scheda tecnica	Spiegazioni elettronici
Recom International Pow...	RCD-48	114Kb / 4P	Constant Current Buck LED Driver
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	TP8021A	551Kb / 5P	Average Current Type LED Buck Constant Current Driver
	TP8021N	534Kb / 5P	Average Current Type LED Buck Constant Current Driver
	TP8023	562Kb / 5P	Average Current Type LED Buck Constant Current Driver
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QX Micro Devices Co.,Lt...	QX7135	2Mb / 2P	Linear buck LED constant current driver
Recom International Pow...	RCDE-48	880Kb / 7P	Constant Current Buck LED Driver
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