1 Features

• Supports Li-ion, LiFePO4, PbA, NiMH, and NiCd

chemistries

• Capacity estimation using patented Impedance

Track™ technology for batteries from 3 V to 65 V

– Aging compensation

– Self-discharge compensation

• Supports battery capacities up to 29 Ah with

standard configuration options

• Supports charge and discharge currents up to

32 A with standard configuration options

• 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: < 145-μA average

– SLEEP: < 84-μA average

– FULL SLEEP: < 30-μA average

• Package: 14-pin TSSOP

2 Applications

• Light electric vehicles

• Medical instrumentation

• Mobile radios

• Power tools

• Uninterruptible power supplies (UPS)

3 Description

The BQ34Z100-G1 device is an Impedance Track™

fuel gauge for Li-ion, PbA, NiMH, and NiCd

batteries, and works independently of battery seriescell

configurations. Batteries from 3 V to 65 V can

be easily supported through an external voltage

translation circuit that is controlled automatically to

reduce system power consumption.

The BQ34Z100-G1 device provides several interface

options, including an I2C slave, an HDQ slave, one

or four direct LEDs, and an ALERT output pin.

Additionally, the BQ34Z100-G1 provides support for

an external port expander for more than four LEDs.