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Texas Instruments BQ27426YZFT — Power Management (PMIC / Gate Driver)

BQ27426YZFT Battery Monitor, Impedance Track™, I²C

MPNBQ27426YZFT
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Texas Instruments BQ27426YZFT, Impedance Track™ series, Battery Monitor, I²C interface, 1-cell Li-ion, 9-UFBGA/DSBGA package, -40°C to 85°C operating temperature.

$2.7400Ref. price · indicative, final on quote
Texas Instruments BQ27426YZFT datasheet (PDF)
Packaging9-UFBGA, DSBGA
RoHSROHS3 Compliant
SeriesImpedance Track™
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

BQ27426YZFT specifications
ParameterValue
SeriesImpedance Track™
MountingSurface Mount
InterfaceI²C
Operating temperature-40°C~85°C(TA)
PackageTape & Reel (TR); Cut Tape (CT)
FunctionBattery Monitor
Case9-UFBGA, DSBGA
Number of cells1
Battery chemistryLithium Ion

Product details

Single-cell Li-ion fuel gauge with Impedance Track™

It communicates over an I²C interface, making it a straightforward add-on for a host MCU that needs accurate remaining-capacity data without running coulomb counting in firmware. The 9-DSBGA package (9-UFBGA, DSBGA) is a small 0.4 mm pitch BGA — fine for compact portable designs, but not something you want to hand-solder in the field without a rework station and magnification.

The Impedance Track™ algorithm self-learns battery impedance over temperature and age, so the gauge stays honest through winter and summer without a calibration cycle. If your system lives inside a conditioned building (0°C to 70°C), you still get the headroom — no issue.

Frequently asked questions

Can BQ27426YZFT be used with 2-cell batteries?

No. The BQ27426YZFT is designed for a single-cell (1-cell) Lithium Ion pack. It does not support 2-cell or higher stack configurations. For multi-cell applications, consider a part like the BQ2084DBT-V143 (2 to 4 cells, SMBus interface) or the BQ79612PAPRQ1 (automotive grade, 1 cell, SPI/UART).

Is BQ27426YZFT equivalent to BQ27426YZFR?

The BQ27426YZFR is a different order code within the same base product number (BQ27426). The 'FT' and 'FR' suffixes typically denote packaging or tape/reel variations. Check the specific datasheet to confirm any electrical or footprint differences — the function and Impedance Track™ algorithm are shared across the BQ27426 family.