BQ2011K_11 Datasheet, PDF (14/22 Pages) Texas Instruments – Gas Gauge IC for High Discharge Rates

bq2011K
The segment outputs are modulated as two banks, with
segments 1, 3, and 5 alternating with segments 2 and 4.
The segment outputs are modulated at approximately
320Hz, with each bank active for 30% of the period.
SEG1 blinks at a 4Hz rate whenever VSB has been de-
tected to be below VEDV to indicate a low-battery condi-
tion or NAC is less than 10% of PFC.
Microregulator
The bq2011K can operate directly from 4 cells. To facili-
tate the power supply requirements of the bq2011K, an
REF output is provided to regulate an external low-
threshold n-FET. A micropower source for the bq2011K
can be inexpensively built using the FET and an exter-
nal resistor.
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