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Analog Circuit Design Volume Three by John Hamburger, Bob Dobkin

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Chapter 282

60V, synchronous step-down high current LED driver

Hua (Walker) Bai

Abstract

The LT3763, a 60V synchronous, step-down DC/DC controller designed to accurately regulate LED current at up to 20A with fast PWM dimming, is described.

Keywords

LED driver controller

LT3763

Introduction

The meaning of the term “high power LED” is rapidly evolving. Although a 350mA LED could easily earn the stamp of “high power” a few years ago, it could not hold a candle to the 20A LED or the 40A laser diodes of today. High power LEDs are now used in DLP projectors, surgical equipment, stage lighting, automotive lighting and other applications traditionally served by high intensity bulbs. To meet the light output requirements of these applications, ...

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