BQ2012 Overview
The bq2012 Gas Gauge IC is intended for battery-pack or in-system installation to maintain an accurate record of available battery charge. The IC monitors a voltage drop across a sense resistor connected in series between the negative battery terminal and ground to determine charge and discharge activity of the battery. Self-discharge of NiMH and NiCd batteries is estimated based on an internal timer and temperature sensor. pensations for battery temperature and rate of charge or discharge are applied to the charge, discharge, and self-discharge calculations to provide available charge information across a wide range of operating conditions. Battery capacity is automatically recalibrated, or “learned,” in the course of a discharge cycle from full to empty. The bq2012 includes a charge control output that, when used with other full-charge safety termination methods, can provide a...
BQ2012 Key Features
- Conservative and repeatable measurement of available charge in rechargeable batteries
- Charge control output
- Designed for battery pack integration
- 120µA typical standby current
- Small size enables imple
- Integrate within a system or as a stand-alone device
- Display capacity via single
- Measurements pensated for current and temperature
- Self-discharge pensation using internal temperature sensor
- 16-pin narrow SOIC