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Not Recommended For New Designs bq2012
Gas Gauge IC With
Slow-Charge Control
Features General Description means of controlling charge based
on the battery's charge state. вћ¤ Conservative and repeatable
measurement of available charge
in rechargeable batteries 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. Nominal available charge may be directly indicated using a five-or sixsegment LED display. These segments are used to graphically indicate nominal available charge. вћ¤ Charge control output
вћ¤ Designed for battery pack integration -120ВµA typical standby current
(self-discharge estimation mode) -Small size enables implementations in as little as 1 2
square inch of PCB вћ¤ Integrate within a system or as a
stand-alone device -Display capacity via singlewire serial communication
port or direct drive of LEDs вћ¤ Measurements compensated for
current and temperature Self-discharge of NiMH and NiCd
batteries 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, …
