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BQ2014

UNITRODE
Part Number BQ2014
Manufacturer UNITRODE
Description Gas Gauge
Published Feb 16, 2020
Detailed Description Not Recommended For New Designs bq2014 Gas Gauge IC with External Charge Control Features ➤ Conservative and repeatab...
Datasheet PDF File BQ2014 PDF File

BQ2014
BQ2014

Overview
Not Recommended For New Designs bq2014 Gas Gauge IC with External Charge Control Features ➤ Conservative and repeatable measurement of available charge in rechargeable batteries ➤ Charge control output operates an external charge controller such as the bq2004 Fast Charge IC ➤ Designed for battery pack integration - 120µA typical standby current ➤ Display capacity via single-wire serial communication port or direct drive of LEDs ➤ Measurements compensated for current and temperature ➤ Self-discharge compensation using internal temperature sensor ➤ User-selectable end-of-discharge threshold ➤ Battery voltage, nominal available charge, temperature, etc.
available over serial port ➤ 16-pin narrow SOIC General Description The bq2014 Gas Gauge IC is intended for battery-pack or in-system installation to maintain an accurate record of available battery charge.
The IC monitors the 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.
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, discharge, and self-discharge calculations to provide available charge information across a wide range of operating conditions.
Battery capacity is automatically recalibrated, or “learned,” in the course of a discharge cycle from full to empty.
The bq2014 includes a charge control output that controls an external Fast Charge IC such as the bq2004.
Nominal Available Charge (NAC) may be directly indicated using a five-segment LED display.
The bq2014 supports a simple singleline bidirectional serial link to an external processor (with a common ground).
The bq2014 outputs battery information in response to external commands over the serial link.
Internal registers include available charge, temperature, capacity, battery voltage, batter...


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