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December 2013

DocID025626 Rev 1

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STEVAL-ISB014V2

Battery monitor with alarm output for

gas gauge applications based on the STC3115

Data brief

Features

• 0.25% accuracy battery voltage monitoring

• Coulomb counter and voltage-mode gas gauge

operations

• Robust initial open-circuit-voltage (OCV)

measurement at power-up with debounce

delay

• Low battery level alarm output with

programmable thresholds

• Internal temperature sensor

• Battery swap detection

• Low power

– 45 µA in power-saving mode

– 2 µA max in standby mode

• 1.4 x 2.0 mm 10-bump CSP package

• RoHS compliant

Description

The STEVAL-ISB014V2 product evaluation board

is based on the STC3115. This device includes

the hardware functions required to implement a

low-cost gas gauge for battery monitoring. It uses

current sensing, Coulomb counting and accurate

battery voltage measurements to estimate the

state-of-charge (SOC) of the battery. An internal

temperature sensor simplifies implementation of

temperature compensation.

An alarm output signals a low SOC condition and

can also indicate low battery voltage. The alarm

threshold levels are programmable.

The STC3115 offers advanced features to ensure

high performance gas measurement in all

application conditions.

The STEVAL-ISB014V2 evaluation board is

suitable for portable medical equipment, mobile

phones, multimedia players and digital cameras.

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