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BQ2084-V133 PDF预览

BQ2084-V133

更新时间： 2024-10-28 04:34:39
品牌 Logo 应用领域
德州仪器 - TI /
页数 文件大小 规格书
64页 968K
描述
SBS v1.1-COMPLIANT GAS GAUGE FOR USE WITH THE bq29312

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BQ2084-V133 数据手册

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bq2084-V133  
www.ti.com  
SLUS640A–JUNE 2005–REVISED JUNE 2005  
SBS v1.1-COMPLIANT GAS GAUGE FOR  
USE WITH THE bq29312  
FEATURES  
DESCRIPTION  
•
•
•
Provides Accurate Measurement of Available  
Charge in Li-Ion and Li-Polymer Batteries  
The bq2084-V133 SBS-compliant gas gauge IC for  
battery pack or in-system installation maintains an  
accurate record of available charge in Li-ion or  
Li-polymer batteries. The bq2084-V133 monitors ca-  
pacity and other critical parameters of the battery  
pack and reports the information to the system host  
controller over a serial communication bus. It is  
designed to work with the bq29312 AFE protection IC  
to maximize functionality and safety and minimize  
component count and cost in smart battery circuits.  
Using information from the bq2084-V133, the host  
controller can manage remaining battery power to  
extend the system run time as much as possible.  
Supports the Smart Battery Specification  
(SBS) V1.1  
Integrated Time Base Eliminates Need for  
External Crystal  
– Optional Crystal input  
•
Works With the TI bq29312 Analog Front-End  
(AFE) Protection IC to Provide Complete Pack  
Electronics for 7.2-V, 10.8-V or 14.4-V Battery  
Packs With Few External Components  
•
•
•
Based on a Powerful Low-Power RISC CPU  
Core With High-Performance Peripherals  
The bq2084-V133 uses an integrating converter with  
continuous sampling for the measurement of battery  
charge and discharge currents. Optimized for cou-  
lomb counting in portable applications, the  
self-calibrating integrating converter has a resolution  
better than 0.65-nVh and an offset measurement  
error of less than 1-µV (typical). For voltage and  
temperature reporting, the bq2084-V133 uses a 16-bit  
A-to-D converter. With the bq29312, the onboard  
ADC also monitors the pack and individual cell  
Integrated Flash Memory Eliminates the Need  
for External Configuration EEPROM  
Uses 16-Bit Delta Sigma Converter for  
Accurate Voltage and Temperature  
Measurements  
•
Measures Charge Flow Using a High  
Resolution 16-Bit Integrating Converter  
– Better Than 0.65-nVh of Resolution  
– Self-Calibrating  
voltages in  
a
battery pack and allows the  
bq2084-V133 to generate the control signals necess-  
ary to implement the cell balancing and the required  
safety protection for Li-ion and Li-polymer battery  
chemistries.  
– Offset Error Less Than 1-µV  
•
•
•
Programmable Cell Modeling for Maximum  
Battery Fuel Gauge Accuracy  
The bq2084-V133 supports the Smart Battery Data  
(SBData) commands and charge-control functions. It  
communicates data using the System Management  
Bus (SMBus) 2-wire protocol. The data available  
include the battery's remaining capacity, temperature,  
voltage, current, and remaining run-time predictions.  
Drives 3-, 4-, or 5-Segment LED Display for  
Remaining Capacity Indication  
Available in a 38-Pin TSSOP (DBT) Package  
APPLICATIONS  
The bq2084-V133 provides LED drivers and  
a
•
•
•
Notebook PCs  
Medical and Test Equipment  
Portable Instrumentation  
pushbutton input to indicate remaining battery ca-  
pacity from full to empty in 20%, 25%, or 33%  
increments with a 3-, 4-, or 5-segment display.  
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.  
Copyright © 2005, Texas Instruments Incorporated  
1234567...64

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