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Analog Circuit Design Volume Three by John Hamburger, Bob Dobkin

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Chapter 296

Quad output switching converter provides power for large TFT LCD panels

Dongyan Zhou

Abstract

The LT1943, a highly integrated, 4-output switching regulator designed to power large TFT LCD panels, is described.

Keywords

TFT LCD panel

switching regulator

LT1943

Introduction

The LT1943 is a highly integrated, 4-output regulator designed to power large TFT LCD panels. The LT1943 employs switching regulators—instead of linear regulators—to minimize power dissipation and accommodate a wide input voltage range. The wide input range, 4.5V to 22V, allows it to accept a variety of power sources, including the commonly used 5V, 12V and 19V AC adaptors. The first buck regulator provides a logic voltage with up to 2A of current. The ...

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