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Analog Circuit Design Volume Three by John Hamburger, Bob Dobkin

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Chapter 218

Low dropout, constant-current/constant-voltage 3A battery charger

Chiawei Liao

Abstract

A low dropout, constant-current/ constant-voltage 3A battery charger is described.

Keywords

Battery charger

LT1511

Introduction

The LT1511 current mode PWM battery charger is the simplest, most efficient solution for fast charging modern rechargeable batteries that require constant-current and/or constant-voltage charging including lithium-ion (Li-Ion), nickel-metal-hydride (NiMH) and nickel-cadmium (NiCd).

Higher duty cycle for the LT1511 battery charger

Maximum duty cycle for the LT1511 constant-current/constant-voltage battery charger is typically 90%, but this may be too low for some applications. For example, if an 18V ±3% ...

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