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Analog Circuit Design Volume Three by John Hamburger, Bob Dobkin

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Chapter 313

Low profile synchronous, 2-phase boost converter produces 200W with 98% efficiency

Victor Khasiev

Abstract

A low profile synchronous, 2-phase boost converter that produces 200W with 98% efficiency is described.

Keywords

Synchronous boost converter

LT3782A

Introduction

Automotive audio amplifiers require a high power boost converter that is both efficient and compact. High efficiency is essential to keep dissipated heat low and avoid bulky and expensive heat sinks. The LT3782A is a 2-phase synchronous PWM controller, making it possible to produce a low profile, high power boost supply that achieves 98% efficiency.

A 24V output boost converter at 8.5A (continuous), 10.5A (peak) from a car battery

Figure 313.1 shows a ...

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