The BQ34Z100-G1 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 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.

• 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