October 2009

Doc ID 16263 Rev 1

1/15

AN3064

Application note

Using the STC3100 battery monitor for gas gauge applications

Introduction

Handheld devices such as mobile phones, music and video players, as well as portable

navigation devices, tend to integrate ever more multimedia functions, all of which have

different power needs. As a consequence, it has become difficult to manage the battery’s

state-of-charge (SoC) and predict the remaining operating time with no dedicated gas

gauge support. The STC3100 is a new device that includes battery monitoring features

(voltage, current and temperature) and a Coulomb counter to implement a gas gauge

system in existing or future applications.

This application note is intended to assist product designers by taking advantage of using

the STC3100 in one-cell Li-Ion battery handheld applications to implement the gas gauge

function. The document provides:

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