The bq27545-G1 Li-ion battery fuel gauge is a microcontroller peripheral that provides fuel gauging for single-cell Li-Ion battery packs. The device requires little system microcontroller firmware development for accurate battery fuel gauging. The bq27545-G1 resides within the battery pack or on the system’s main-board with an embedded battery (non removable).
The bq27545-G1 uses the patented Impedance Track™ algorithm for fuel gauging, and provides information such as remaining battery capacity (mAh), state-of-charge (%), run-time to empty (minimum), battery voltage (mV), and temperature (°C). It also provides detections for internal short or tab disconnection events.
The bq27545-G1 also features integrated support for secure battery pack authentication, using the SHA-1/HMAC authentication algorithm.
The device comes in a 15-ball Nano-Free™ DSBGA package (2.61 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||Features||Operating temperature range (C)||Package Group||Package size: mm2:W x L (PKG)|
|300||None||Pack||IT (High accuracy)||SHA-1 Authentication||-40 to 85||DSBGA | 15||15DSBGA: 5 mm2: 2.75 x 1.75 (DSBGA | 15)|
|BQ27500-V130||Samples not available||Single Cell||Li-Ion/Li-Polymer||8000||I2C||300||None||System||IT (High accuracy)||-40 to 85||
DSBGA | 12
SON | 12
See datasheet (DSBGA)
12SON: 10 mm2: 2.5 x 4 (SON | 12)
|BQ27501||Samples not available||Single Cell||Li-Ion/Li-Polymer||8000||I2C||300||None||System||IT (High accuracy)||-40 to 85||SON | 12||12SON: 10 mm2: 2.5 x 4 (SON | 12)|
|BQ27505-J5||Samples not available||Single Cell||Li-Ion/Li-Polymer||8000||I2C||300||None||System||IT (High accuracy)||-40 to 85||DSBGA | 12||See datasheet (DSBGA)|