1 Features
1• Accurate End-Of-Service (EOS) Determination for
Batteries in Rarely Discharged Applications
• Compensated End-of-Discharge Voltage (CEDV)
Gas Gauge for Single- and Multi-Cell Batteries,
Providing
– State-Of-Charge (SOC)
– Time-To-Empty (TTE)
– State-Of-Health (SOH)
– Watt-Hour–Based Charge Termination
• Supports Voltages up to 65 V, Capacities up to
32 Ah, and Currents up to 32 A—with Options to
Extend Beyond These Levels Using Scaling
• Supports Li-Ion, LiFePO4, Lead-Acid (PbA),
NiMH, and NiCd Chemistries
• Dual Configurable Host Interrupt or GPO
• Lifetime Data Logging Options
• Precision Coulomb Counter, Voltage, and
Temperature Measurement
• Power Enable Control
• I2C™ Communication with Host
• Accumulated Charge Coulomb Counting with
Configurable Interrupt
• SHA-1 Authentication

2 Applications
• UPS Backup Systems
• Telematics Backup Systems
• Emergency Battery Power Modules
• Energy Storage Systems
• Asset Tracking
• Building Security Systems
• Video Surveillance
• Electronic Smart Locks
• Remote and Emergency Lighting
• Server Power Systems
• Robotics
• Toys

3 Description
The bq34110 CEDV Battery Gas Gauge provides
CEDV gas gauging and End-Of-Service (EOS)
Determination for single- and multi-cell batteries. The
device includes enhanced features to support
applications where the battery is kept fully charged
and is rarely discharged, such as found in a wide
variety of backup systems. The bq34110 gas gauge
supports multiple battery chemistries, including Li-Ion
and LiFePO4, lead acid (PbA), Nickel Metal Hydride
(NiMH), and Nickel Cadmium (NiCd).
The gas gauging function uses voltage, current, and
temperature data with Compensated End-of-
Discharge Voltage (CEDV) technology to provide
State-Of-Charge (SOC) and State-Of-Health (SOH)
data. The gas gauge also incorporates an End-Of-
Service (EOS) Determination function that alerts
when battery capability has degraded and is
approaching the conclusion of its usable service.
The data available from the gauge can be read by the
host through a 400-kHz I2C bus. Two ALERT outputs
are also available to interrupt the host or can be used
for other functions, based on a variety of configurable
options.