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Texas Instruments BQ27541DRZT — Power Management (PMIC / Gate Driver)

BQ27541DRZT Texas Instruments Battery Fuel Gauge

MPNBQ27541DRZT
Active

Texas Instruments BQ27541DRZT, Impedance Track™ series, Multi-Function Controller, single-cell Li-ion fuel gauge, I²C interface, -40°C to 85°C, 12-VFDFN Exposed Pad package

$8.0500Ref. price · indicative, final on quote
Packaging12-VFDFN Exposed Pad
RoHSROHS3 Compliant
SeriesImpedance Track™
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

BQ27541DRZT specifications
ParameterValue
SeriesImpedance Track™
MountingSurface Mount
InterfaceI²C
Operating temperature-40°C~85°C(TA)
PackageTape & Reel (TR); Cut Tape (CT)
FunctionMulti-Function Controller
Case12-VFDFN Exposed Pad
Number of cells1
Fault protectionOver Temperature
Battery chemistryLithium Ion

Product details

Single-cell fuel gauge with learned impedance

The BQ27541DRZT is a single-cell Li-ion battery fuel gauge from Texas Instruments' Impedance Track™ series, communicating over I²C. Its key advantage is the patented algorithm that learns the battery's impedance over charge/discharge cycles, delivering state-of-charge accuracy that improves with use rather than drifting — no full discharge recalibration needed.

It is ROHS3 compliant. The base product number is BQ27541.

Fault protection and chemistry match

Integrated over-temperature fault protection monitors the die temperature, not the cell — so the thermistor input on the host side is still needed for pack-level thermal supervision. The gauge is pre-configured for Lithium Ion chemistry; no chemistry profile selection is required at startup.

Frequently asked questions

Is the BQ27541DRZT a replacement for the BQ27541DRZR?

The BQ27541DRZT and BQ27541DRZR share the same base product number BQ27541. The suffix difference typically indicates packaging or tape/reel variant. Confirm the exact ordering code with your BOM — the DRZT is listed in Tape & Reel (TR) and Cut Tape (CT) options.

What is the closest functional alternative to the BQ27541DRZT?

The BQ79612PAPRQ1 is a different device — it is an automotive-grade battery monitor with SPI/UART interface and AEC-Q100 qualification, not a direct fuel-gauge replacement. For a single-cell Li-ion gauge with Impedance Track™, the BQ27541DRZT is the active standard part; no pin-compatible second-source is listed.