The Texas Instruments bq27742-G1 is a fuel gauge for single-cell Li-Ion battery packs that uses patented Impedance Track™ technology to deliver rate-, temperature-, and aging-compensated predictions of remaining battery capacity and system runtime with highest accuracy. The device also includes a fully integrated high-side protector that eliminates the need for a separate Li-Ion protection circuit and provides a full suite of high-accuracy fault detections for overvoltage, undervoltage, overcurrent in charge, overcurrent in discharge, and short-circuit in discharge conditions. The hardware protection functions offer built-in data flash-based programmability, allowing simple reconfiguration of existing devices for varying end equipment needs.
The fuel gauge provides information such as remaining battery capacity (mAh), state-of-charge (%), runtime to empty (minutes), voltage (mV), current (mA), and temperature (°C), as well as recording vital parameters throughout the lifetime of the battery. The device also supports interrupts to the host to indicate detection of a variety of important battery conditions to the system.
The DSBGA is a 15-ball package (2.78 mm × 1.96 mm) that is ideal for space-constrained applications.
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|Part number||Order||Number of series cells||Cell chemistry||Battery capacity (Max) (mAh)||Communication interface||Battery capacity (Min) (mAh)||External capacity indication||Implementation||Gas gauge algorithm||Cell balancing||Features||Operating temperature range (C)||Package Group||Package size: mm2:W x L (PKG)|
|-40 to 85||DSBGA | 15||15DSBGA: 5 mm2: 2.75 x 1.75 (DSBGA | 15)|
|100||None||Pack||Impedance Track||SHA-1 Authentication||-40 to 85||DSBGA | 15||15DSBGA: 5 mm2: 2.75 x 1.75 (DSBGA | 15)|
|14000||I2C||100||None||Pack||Impedance Track||Battery Management Unit||-40 to 85||SON | 12||12SON: 10 mm2: 2.5 x 4 (SON | 12)|
|100||None||Pack||Impedance Track||SHA-256 Authentication||-40 to 85||DSBGA | 12||12DSBGA: 3 mm2: 1.4 x 2.064 (DSBGA | 12)|