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 seriescell
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.