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BQ78412 Fiches technique(PDF) 1 Page - Texas Instruments

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No de pièce BQ78412
Description  Pb-Acid Battery State-of-Charge Indicator With Run-Time Display
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

BQ78412 Fiches technique(HTML) 1 Page - Texas Instruments

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bq78412
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SLUSAA0 – OCTOBER 2010
bq78412 Pb-Acid Battery State-of-Charge Indicator With Run-Time Display
Check for Samples: bq78412
1
FEATURES
DESCRIPTION
Designed for Use with 12-V Lead-Acid
The bq78412 Pb-Acid Battery State-of-Charge (SoC)
Batteries in Consumer UPS Systems
Indicator with Run-Time Display is a complete
stand-alone battery gas-gauge solution designed for
Programmable Cell Models for Enhanced
single 12V Pb-Acid batteries. The bq78412 displays
Pb-Acid Gas Gauging Performance
remaining Run-Time-To-Empty during discharge and
Provides 10-LED Bar Graph of Run-Time
Percent (%) capacity during charge using a 10-LED
Remaining During Discharge and % Capacity
(light-emitting diode) bar graph.
During Charge
The bq78412 monitors battery voltage, current, and
Can Be Easily Integrated Into Battery Cover
ambient temperature to calculate state-of-charge and
Works with Pb-Acid Batteries Up to 327 Ah
determine
remaining
runtime-to-empty.
Measured
values can be recorded and tracked for later retrieval
Records Cumulative Usage Data Internally for
for warranty purposes.
Warranty Return Analysis
On-Chip Temperature Sensor
Programmable cell models allow the bq78412 to be
customized to a variety of Pb-Acid formulations and
Data Interface for Retrieving Warranty
capacities.
Information
Current measurements and Coulomb-counting for
Fully Programmable Features and Thresholds
gas-gauging are also automatically performed by the
via UART Serial Interface
bq78412. Current measurements use a small value
State-of-Health (SoH) Determination and
sense resistor placed in the negative power path and
Status Reporting
calibrated
in-circuit.
This
allows
the
precise,
Includes Configurable Signal for Audible
continuous, real-time calculation of battery capacity
and run-time-to-empty values.
Low-Capacity, Low-Voltage, and Overvoltage
Warnings
Temperature
sensing
augments
gas-gauge
and
Addressable Commands for Use in
capacity information using a firmware algorithm to
Multi-Battery Systems
compensate for the temperature effects on capacity.
Optional Infra-Red Communications Interface
A serial port is available for configuring various
programmable parameters including cell models,
APPLICATIONS
calibration
values,
serial
number
and
date
of
manufacture. The serial port can operate an infra-red
Stand-Alone Uninterruptible Power Supplies
(IR) interface to allow connector-less data acquisition.
12-V Pb-Acid Battery Monitors
The
bq78412
is
easily
configurable,
is
fully
Battery Warranty Data Logging Equipment
programmed and requires no algorithm or firmware
development
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright © 2010, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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