BQ34Z100-R2 Wide Range Fuel Gauge with Impedance Track™ Technology

1 Features

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

chemistries

• Capacity estimation using patented Impedance

Track™ technology for batteries from 3 V to

16.7 KV

– Aging compensation

– Self-discharge compensation

• Supports battery capacities up to 7000 Ah with

standard configuration options

• Supports charge and discharge currents up to

8160 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-R2 device is an Impedance Track™

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

batteries, and works independently of battery series-

cell configurations. Batteries from 3 V to 16.7 KV

can be easily supported through an external voltage

translation circuit that is controlled automatically to

reduce system power consumption.

The BQ34Z100-R2 device provides several interface

options, including an I2C peripheral, an HDQ

peripheral, one or four direct LEDs, and an ALERT

output pin. Additionally, the BQ34Z100-R2 provides

support for an external port expander for more than

four LEDs.

Device Information

PART NUMBER(1)

PACKAGE

BODY SIZE (NOM)

BQ34Z100-R2

TSSOP (14)

5.00 mm × 4.40 mm

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

Simplified Schematic

BQ34Z100-R2

SLUSF37 – DECEMBER 2022

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.