SLUSB20C November 2012 – November 2021
The BQ27520-G4 system-side Li-ion battery fuel gauge is a microcontroller peripheral that provides fuel gauging for single-cell Li-ion battery packs. The device requires minimal system microcontroller firmware development. The fuel resides on the main board of the system and manages an embedded battery (nonremovable) or an up to 14500-mAhr capacity removable battery pack. To allow for optimal performance in the end application, special considerations must be taken to ensure minimization of measurement error through proper printed circuit board (PCB) board layout. Section 9.2.1 details these requirements.