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Texas Instruments BQ34Z110PW — Discrete Semiconductors

BQ34Z110PW Lead-Acid Fuel Gauge, Impedance Track, 14-TSSOP

MPNBQ34Z110PW
End of Life

Texas Instruments BQ34Z110PW, Impedance Track™ series, Battery Monitor, Lead Acid chemistry, HDQ and I²C interface, Surface Mount, 14-TSSOP package, -40°C to 85°C operating temperature.

$7.93Ref. price · indicative, final on quote
Texas Instruments BQ34Z110PW datasheet (PDF)
Packaging14-TSSOP (0.173", 4.40mm Width)
RoHSROHS3 Compliant
SeriesImpedance Track™
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

BQ34Z110PW specifications
ParameterValue
SeriesImpedance Track™
MountingSurface Mount
InterfaceHDQ, I²C
Operating temperature-40°C ~ 85°C (TA)
PackageTube
FunctionBattery Monitor
Case14-TSSOP (0.173\", 4.40mm Width)
Battery chemistryLead Acid

Product details

Lead-acid fuel gauge with Impedance Track

The Texas Instruments BQ34Z110PW is a battery monitor IC purpose-built for lead-acid chemistries, running the Impedance Track™ fuel-gauging algorithm. It communicates over HDQ or I²C to a host controller, reporting state-of-charge, voltage, and remaining capacity.

The Impedance Track algorithm compensates for discharge rate, temperature, and cell aging — the accuracy a calibration technician expects from a fuel gauge that tracks impedance changes over the battery's life, not just voltage lookup. The HDQ and I²C interface options give the firmware engineer flexibility: HDQ uses a single-wire bus for minimal pin count, I²C for standard multi-device bus integration. The 14-TSSOP package is a 4.40 mm wide body, common for this pin count, and the surface-mount footprint suits automated assembly lines.

It is ROHS3 compliant.

Frequently asked questions

Can BQ34Z110PW be used with 24V lead acid?

Yes — the BQ34Z110PW is a lead-acid battery monitor, and the Impedance Track algorithm scales to support multi-cell series stacks including 24V nominal banks. Verify the specific voltage range against the full datasheet for your cell count.

How does BQ34Z110PW compare to BQ34Z100?

The BQ34Z100 is a newer generation lead-acid fuel gauge with similar Impedance Track core but updated firmware and register map. The BQ34Z110PW is an established variant; check the TI application note for migration differences if you are cross-shopping the two.

What is the accuracy of BQ34Z110PW?

Accuracy depends on the Impedance Track algorithm's learning cycle and the quality of the battery-characterization data loaded during calibration. The algorithm compensates for temperature, discharge rate, and aging — typical state-of-charge error is within a few percent after a full learning cycle, but the exact figure requires a traceable verification against a calibrated load and reference meter.