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BQ2011K

UNITRODE
Part Number BQ2011K
Manufacturer UNITRODE
Description Gas Gauge IC
Published Feb 16, 2020
Detailed Description bq2011K Gas Gauge IC for High Discharge Rates Features ➤ Conservative and repeatable measurement of available charge ...
Datasheet PDF File BQ2011K PDF File

BQ2011K
BQ2011K

Overview
bq2011K 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 Pin Connections General Description 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.
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 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 displayed depending on the display mode.
Pin Names Nominal available charge may be directly indicated using a five-segment LED display.
These segments are used to graphically indicate nominal available charge.
The bq2011K supports a simple single-line bidirectional serial link to an external processor (common ground).
The bq2011K outputs battery information in response to external commands over the serial link.
To support subassembly test...


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