The Texas Instruments bq27425-G2 fuel gauge is an easy-to-configure microcontroller peripheral that provides system-side fuel gauging for single-cell Li-Ion batteries. The device requires minimal user configuration and system microcontroller firmware development.
The fuel gauge uses the patented Impedance Track™ algorithm for fuel gauging, and provides information such as remaining battery capacity (mAh), state-of-charge (%), and battery voltage (mV).
Battery fuel gauging with the bq27425-G2 fuel gauge requires connections only to PACK+ (P+) and PACK– (P–) for a removable battery pack or embedded battery circuit. The 15-pin, 2.69 mm × 1.75 mm, 0.5-mm pitch chip scale package (DSBGA) is ideal for space-constrained applications.
|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)|
||Single Cell||Li-Ion/Li-Polymer||4000||I2C||100||None||System||Impedance Track||
||-40 to 85||DSBGA | 15||See datasheet (DSBGA)|
||Single Cell||Li-Ion/Li-Polymer||8000||I2C||100||None||System||Impedance Track||
||Integrated Sense Resistor||-40 to 85||DSBGA | 9||See datasheet (DSBGA)|