1FEATURES

23• Supports Lead-Acid Chemistries

• Capacity Estimation Using Patented

Impedance Track™ Technology for Batteries

from 4 V to 64 V

– Aging Compensation

– Self-Discharge Compensation

• Supports Battery Capacities Above 65 Ahr

• Supports Charge and Discharge Currents

Above 32 A

• External NTC Thermistor Support

• Supports Two-Wire I2C™ and HDQ Single-Wire

Communication Interfaces with Host System

• SHA-1, HMAC Authentication

• One- or Four-LED Direct Display Control

• Five-LED and Higher Display Through Port

Expander

• Reduced Power Modes (Typical Battery Pack

Operating Range Conditions)

– Normal Operation: < 140 μA Average

– Sleep: < 64 μA Average

– Full Sleep: < 19 μA Average

• Package: 14-Pin TSSOP

APPLICATIONS

• Light Electric Vehicles

• Power Tools

• Medical Instrumentation

• Uninterruptible Power Supplies (UPS)

• Mobile Radios

DESCRIPTION

The Texas Instruments bq34z110 is a fuel gauge solution that works independently of battery series-cell

configurations, and supports Lead-Acid battery chemistries. Batteries from 4 V to 64 V can be supported through

an external voltage translation circuit that can be controlled automatically to reduce system power consumption.

The bq34z110 device provides several interface options, including an I2C slave, an HDQ slave, one or four direct

LEDs, and an Alert output pin. Additionally, the bq34z110 provides support for an external port expander for

more than four LEDs.