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BQ2011

UNITRODE
Part Number BQ2011
Manufacturer UNITRODE
Description Gas Gauge IC
Published Feb 16, 2020
Detailed Description bq2011 Gas Gauge IC for High Discharge Rates Features ➤ Conservative and repeatable measurement of available charge i...
Datasheet PDF File BQ2011 PDF File

BQ2011
BQ2011

Overview
bq2011 Gas Gauge IC for High Discharge Rates 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 (self-discharge estimation mode) - Small size enables imple- mentations in as little as 1 2 square inch of PCB ➤ Direct drive of LEDs for capacity display ➤ Self-discharge compensation using internal temperature sensor ➤ Simple single-wire serial communications port for subassembly testing ➤ 16-pin narrow SOIC General Description The bq2011 Gas Gauge IC is intended for battery-pack 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.
The bq2011 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.
Compensations 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 PFC and MODE pins.
Actual battery capacity is automatically “learned” in the course of a discharge cycle from full to empty and may be displayed depending on the display mode.
Nominal available charge may be directly indicated using a five-segment LED display.
These segments are used to indicate graphically the nominal available charge.
The bq2011 supports a simple singleline bidirectional serial link to an external processor (common ground).
The bq2011 outputs battery information in response to external commands over the serial link.
To support subassembly testing, the outputs may also be controll...


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