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BQ20811DBT PDF预览

BQ20811DBT

更新时间: 2024-11-13 20:09:23
品牌 Logo 应用领域
德州仪器 - TI 光电二极管
页数 文件大小 规格书
8页 154K
描述
1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO38, TSSOP-38

BQ20811DBT 技术参数

生命周期:Obsolete零件包装代码:TSSOP
包装说明:TSSOP,针数:38
Reach Compliance Code:unknownECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.84
可调阈值:NO模拟集成电路 - 其他类型:POWER SUPPLY SUPPORT CIRCUIT
JESD-30 代码:R-PDSO-G38长度:9.7 mm
信道数量:1功能数量:1
端子数量:38最高工作温度:70 °C
最低工作温度:-20 °C封装主体材料:PLASTIC/EPOXY
封装代码:TSSOP封装形状:RECTANGULAR
封装形式:SMALL OUTLINE, THIN PROFILE, SHRINK PITCH认证状态:Not Qualified
座面最大高度:1.2 mm最大供电电压 (Vsup):3.6 V
最小供电电压 (Vsup):3 V标称供电电压 (Vsup):3.3 V
表面贴装:YES温度等级:COMMERCIAL
端子形式:GULL WING端子节距:0.5 mm
端子位置:DUAL宽度:4.4 mm
Base Number Matches:1

BQ20811DBT 数据手册

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SLUS502 – SEPTEMBER 2001  
ꢆ ꢇꢆ ꢈꢉ ꢊ ꢋꢌ ꢍꢎꢏ ꢐ ꢑ ꢎꢆ ꢑ ꢎꢒꢑ ꢓ ꢍꢈ  
ꢔꢉ ꢕ ꢒꢆꢓ ꢖ ꢍꢐ ꢗ ꢐ ꢗꢓ ꢀ ꢁꢂ ꢘ ꢙ ꢅꢅ  
The bq2081 uses an integrating converter with  
continuous sampling for the measurement of  
battery charge and discharge currents. Optimized  
for coloumb counting in portable applications, the  
FEATURES  
D
D
D
Provides Accurate Measurement of Available  
Charge in Li-Ion and Li-Polymer Batteries  
Supports the Smart Battery Specification  
(SBS) V1.1  
self-calibrating integrating converter has  
a
resolution better than 3-nVh and an offset  
measurement error of less than 1-µV (typical). For  
voltage, temperature, and current reporting, the  
bq2081 uses a 15-bit A-to-D converter. In  
conjunction with the bq29311, the onboard ADC  
also monitors individual cell voltages in a battery  
pack and allows the bq2081 to generate the  
control signals necessary to implement the  
required safety protection for Li-Ion and  
Li-Polymer battery chemistries.  
Works With the TI bq29311 Protection IC to  
Provide Complete Pack Electronics for  
10.8-V or 14.4-V Battery Packs with Few  
External Components  
D
D
D
Based on a Powerful Low-Power RISC CPU  
Core With High-Performance Peripherals  
Integrated FLASH Memory Eliminates the  
Need for External Configuration EEPROM  
Measures Charge Flow Using a High  
Resolution 15–Bit Integrating Converter  
– Better Than 3-nVh of Resolution  
– Self-Calibrating  
The bq2081 supports the smart battery data  
(SBData) commands and charge control  
functions. It communicates data using the System  
Management Bus (SMBus) 2-wire protocol or the  
1-wire HDQ16 protocol. The data available  
includes the battery’s remaining capacity,  
temperature, voltage, current, and remaining  
run-time predictions. The bq2081 provides LED  
drivers and a push button input to depict remaining  
battery capacity from full to empty in 20% or 25%  
increments with a 4 or 5 segment display.  
– Offset Error Less Than 1-µV  
D
Uses 15-Bit Delta Sigma Converter for  
Accurate Voltage, Temperature, and Current  
Measurements  
D
D
D
Programmable Cell Modeling for Maximum  
Battery Fuel Gauge Accuracy  
Drives 4- or 5-Segment LED Display for  
Remaining Capacity Indication  
The bq2081 contains 512 bytes of internal FLASH  
EPROM, whith store configuration information.  
The information includes nominal capacity and  
voltage, self–discharge rate, rate compensation  
factors, and other programmable cell–modeling  
factors used to accurately adjust remaining  
capacity for use–conditions based on time, rate,  
and temperature. The bq2081 also automatically  
calibrates or learns the true battery capacity in the  
course of a discharge cycle from programmable  
near full to near empty levels.  
38–pin TSSOP (DBT)  
DESCRIPTION  
The bq2081 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 bq2081 monitors  
capacity and other critical parameters of the  
battery pack and reports the information to the  
The bq29311 protection IC provides power to the  
bq2081 from a 3 or 4 series Li-Ion cell stack,  
eliminating the need for an external regulator  
circuit.  
system host controller over  
a
serial  
communication bus. It is designed to work with the  
bq29311 protection IC to maximize functionality  
and safety and minimize component count and  
cost in smart battery circuits.  
ꢨꢥ ꢦ ꢜ ꢬꢝ ꢧꢪ ꢢ ꢦ ꢥ ꢟꢞ ꢨꢥ ꢫ ꢥ ꢭꢟ ꢧꢡꢥ ꢝꢣꢮ ꢈ ꢪꢢ ꢠꢢ ꢤꢣ ꢥꢠ ꢜꢦ ꢣꢜ ꢤ ꢨꢢ ꢣꢢ ꢢꢝ ꢨ ꢟꢣ ꢪꢥꢠ  
Copyright 2001, Texas Instruments Incorporated  
ꢤ ꢪꢢ ꢝ ꢬꢥ ꢟꢠ ꢨꢜ ꢦ ꢤ ꢟꢝ ꢣꢜ ꢝꢩꢥ ꢣ ꢪꢥ ꢦ ꢥ ꢧꢠ ꢟꢨ ꢩꢤꢣ ꢦ ꢰ ꢜꢣꢪ ꢟꢩꢣ ꢝꢟꢣ ꢜꢤꢥ ꢮ  
1
www.ti.com  

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