BQ2011K Overview
The bq2011K Gas Gauge IC is intended for battery-pack installation to maintain an accurate record of a battery’s available 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. The bq2011K is designed for systems such as power tools with very high discharge rates. Battery self-discharge 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 selfdischarge calculations to provide available charge information across a wide range of operating conditions. Initial battery capacity is set using the PROG1-4 and SPFC pins. Actual battery capacity is automatically “learned” in the course of a discharge cycle from full to empty and may be...
BQ2011K Key Features
- Conservative and repeatable measurement of available charge in rechargeable batteries
- Designed for portable equipment such as power tools with high discharge rates
- Designed for battery pack integration
- 120µA typical standby current
- Small size enables imple
- Direct drive of LEDs for capacity display
- Self-discharge pensation using internal temperature sensor
- Simple single-wire serial munications port for subassembly testing
- 16-pin narrow SOIC