AN3064 Datasheet, PDF (1/15 Pages) STMicroelectronics – Using the STC3100 battery monitor for gas gauge applications

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:
■ a brief description of the STC3100 device and typical applications,
■ information on how to use the battery monitoring functions of the STC3100,
■ a general flow chart of the tasks needed to implement a simple gas gauge system.
October 2009
Doc ID 16263 Rev 1
1/15
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