Datasheet

Introduction

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1 Introduction

1.1 bq2427x IC Features

The bq24278 integrates a synchronous PWM controller, power MOSFETs, input current sensing, high-

accuracy current and voltage regulation, charge termination and power path management into a chipscale

package. Key integrated circuit (IC) features include:

• High-efficiency, fully integrated, NMOS-NMOS, synchronous buck charger with 1.5-MHz frequency

• Integrated power FETs for up to 2.5-A charge rate

• Power path management between battery and system voltages

For details, see the bq24278 data sheet (SLUSB04).

1.2 bq24278 EVM Features

The bq24278 evaluation module (EVM) is a complete charger module for evaluating compact, flexible,

high-efficiency, switch-mode battery charge and power path management solution for single-cell, Li-ion

and Li-polymer battery-powered systems used in a wide range of portable applications. Key EVM features

include:

• Programmable charge current, input current on, and V

INDPM

threshold using jumpers

• Input power connector for ac adapter

• IN operating range of 4.2 V – 10 V

• LED indication for status signals

• Test points for key signals available for testing purposes. Easy probe hook-up

QFN-Packaged bq24278 Evaluation Module SLUU917–April 2012

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