Datasheet > BQ78412

BQ78412

更新时间： 2024-09-24 08:59:15

品牌	Logo	应用领域
德州仪器 - TI		电池
页数	文件大小	规格书
36页	716K
描述
Pb-Acid Battery State-of-Charge Indicator With Run-Time Display

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BQ78412 数据手册

bq78412

www.ti.com

SLUSAA0 –OCTOBER 2010

bq78412 Pb-Acid Battery State-of-Charge Indicator With Run-Time Display

Check for Samples: bq78412

FEATURES

DESCRIPTION

•

Designed for Use with 12-V Lead-Acid

Batteries in Consumer UPS Systems

The bq78412 Pb-Acid Battery State-of-Charge (SoC)

Indicator with Run-Time Display is complete

stand-alone battery gas-gauge solution designed for

single 12V Pb-Acid batteries. The bq78412 displays

remaining Run-Time-To-Empty during discharge and

Percent (%) capacity during charge using a 10-LED

(light-emitting diode) bar graph.

Programmable Cell Models for Enhanced

Pb-Acid Gas Gauging Performance

Provides 10-LED Bar Graph of Run-Time

Remaining During Discharge and % Capacity

During Charge

The bq78412 monitors battery voltage, current, and

ambient temperature to calculate state-of-charge and

determine remaining runtime-to-empty. Measured

values can be recorded and tracked for later retrieval

for warranty purposes.

•

Can Be Easily Integrated Into Battery Cover

Works with Pb-Acid Batteries Up to 327 Ah

Records Cumulative Usage Data Internally for

Warranty Return Analysis

•

On-Chip Temperature Sensor

Programmable cell models allow the bq78412 to be

customized to a variety of Pb-Acid formulations and

capacities.

Data Interface for Retrieving Warranty

Information

Current measurements and Coulomb-counting for

gas-gauging are also automatically performed by the

bq78412. Current measurements use a small value

sense resistor placed in the negative power path and

calibrated in-circuit. This allows the precise,

continuous, real-time calculation of battery capacity

and run-time-to-empty values.

•

Fully Programmable Features and Thresholds

via UART Serial Interface

State-of-Health (SoH) Determination and

Status Reporting

Includes Configurable Signal for Audible

Low-Capacity, Low-Voltage, and Overvoltage

Warnings

Temperature sensing augments gas-gauge and

capacity information using a firmware algorithm to

compensate for the temperature effects on capacity.

•

Addressable Commands for Use in

Multi-Battery Systems

Optional Infra-Red Communications Interface

A serial port is available for configuring various

programmable parameters including cell models,

calibration values, serial number and date of

manufacture. The serial port can operate an infra-red

(IR) interface to allow connector-less data acquisition.

The bq78412 is easily configurable, is fully

programmed and requires no algorithm or firmware

development

APPLICATIONS

•

Stand-Alone Uninterruptible Power Supplies

12-V Pb-Acid Battery Monitors

Battery Warranty Data Logging Equipment

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.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...36

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BQ78412 替代型号

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