Chapter 294

Wide input range 1A LED driver powers high brightness LEDs with automotive and 12VAC supplies

John Tilly and Awo Ashiabor

Abstract

A wide input range 1A LED driver that powers high brightness LEDs with automotive and 12VAC supplies is described.

Keywords

LED driver

LT3474

Introduction

Today’s ultrabright LEDs far exceed the performance of incandescent bulbs in both efficiency and lifetime. Taking full advantage of these features requires a correspondingly efficient and reliable LED driver, such as the LT3474. The LT3474 is a step-down 1A LED driver that supports a variety of power sources, has a wide 4V to 36V input voltage range and is programmable to deliver LED current from 35mA to 1A at up to 88% efficiency. It requires ...

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