Datasheet > BQ20851

BQ20851

更新时间： 2024-10-27 22:48:27

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
53页	467K
描述
SBS COMPLIANT GAS GAUGE IC FOR USE WITH THE BQ29311

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中文翻译

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数据手册

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BQ20851 数据手册

ꢀ ꢁꢂ ꢃ ꢄ ꢅꢆ ꢇꢈ ꢆꢉ ꢂ

www.ti.com

SLUS575 − AUGUST 2003

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Programmable Cell Modeling for Maximum

Battery Fuel Gauge Accuracy

FEATURES

Provides Accurate Measurement of Available

Charge in Li-Ion and Li-Polymer Batteries

Drives 3-, 4-, or 5-Segment LED Display for

Remaining Capacity Indication

Supports the Smart Battery Specification

(SBS) V1.1

38-Pin TSSOP (DBT)

Integrated Time Base Removes Need for

External Crystal

APPLICATIONS

Notebook PCs

Works With the TI bq29311 Analog Front End

(AFE) Protection IC to Provide Complete Pack

Electronics for 10.8-V or 14.4-V Battery Packs

With Few External Components

DESCRIPTION

The bq20851−V1P2 SBS-compliant gas gauge IC for

battery pack installation maintains an accurate record of

available charge in Li-ion or Li-polymer batteries. The

bq20851−V1P2 monitors capacity 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 bq29311 analog

front-end (AFE) protection IC to maximize functionality

and safety and minimize component count and cost in

smart battery circuits. Using information from the

bq20851−V1P2, the host controller can manage

remaining battery power to extend the system run time as

much as possible.

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 16-Bit Integrating Converter

− Better Than 3-nVh of Resolution

− Self-Calibrating

− Offset Error Less Than 1-µV

Uses 16-Bit Delta Sigma Converter for

Accurate Voltage and Temperature

Measurements

BLOCK DIAGRAM

Pack+

Charge/Discharge

Power FETs

LDO

Supply Voltage

−

Li-Ion

Cells

bq29311

SMBus

Glueless

Interface

bq20851−V1P2

Level

Translator

−

Cell Inputs

Safety Control

Temp

Sensor

ADC

Voltage

512 Bytes

Config.

Flash

Integrating

ADC

Coulomb

Counting

Sense

Resistor

(10 mΩ - 20 mΩ)

EPROM

Pack−

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.

ꢉꢙ ꢎ ꢞꢖ ꢍ ꢔꢑ ꢎꢓ ꢞ ꢒꢔꢒ ꢟꢠ ꢡꢢ ꢣ ꢤꢥ ꢦꢟꢢꢠ ꢟꢧ ꢨꢩ ꢣ ꢣ ꢪꢠꢦ ꢥꢧ ꢢꢡ ꢫꢩꢀ ꢬꢟꢨ ꢥꢦꢟ ꢢꢠ ꢭꢥ ꢦꢪꢮ ꢉꢣ ꢢꢭꢩ ꢨꢦꢧ

ꢨ ꢢꢠ ꢡꢢꢣ ꢤ ꢦꢢ ꢧ ꢫꢪ ꢨ ꢟ ꢡꢟ ꢨ ꢥ ꢦꢟ ꢢꢠꢧ ꢫ ꢪꢣ ꢦꢯꢪ ꢦꢪ ꢣ ꢤꢧ ꢢꢡ ꢔꢪꢰ ꢥꢧ ꢑꢠꢧ ꢦꢣ ꢩꢤ ꢪꢠꢦ ꢧ ꢧꢦ ꢥꢠꢭ ꢥꢣ ꢭ ꢱ ꢥꢣ ꢣ ꢥ ꢠꢦꢲꢮ

ꢉꢣ ꢢ ꢭꢩꢨ ꢦ ꢟꢢ ꢠ ꢫꢣ ꢢ ꢨ ꢪ ꢧ ꢧ ꢟꢠ ꢳ ꢭꢢ ꢪ ꢧ ꢠꢢꢦ ꢠꢪ ꢨꢪ ꢧꢧ ꢥꢣ ꢟꢬ ꢲ ꢟꢠꢨ ꢬꢩꢭ ꢪ ꢦꢪ ꢧꢦꢟ ꢠꢳ ꢢꢡ ꢥꢬ ꢬ ꢫꢥ ꢣ ꢥꢤ ꢪꢦꢪ ꢣ ꢧꢮ

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中文翻译

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与BQ20851相关器件

型号	品牌	获取价格	描述	数据表
BQ20851DBT	TI	获取价格	1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO14, PLASTIC, TSSOP-38
BQ20851DBTR	TI	获取价格	1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO14, PLASTIC, TSSOP-38
BQ20851DBTRG4	TI	获取价格	1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO14, PLASTIC, TSSOP-38
BQ20851DBTR-V1P2	TI	获取价格	2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO38, PLASTIC, TSSOP-38
BQ20851-V1P2	TI	获取价格	SBS COMPLIANT GAS GAUGE IC FOR USE WITH THE BQ29311
BQ2085DBT	TI	获取价格	SBS-COMPLIANT GAS GAUGE IC FOR USE WITH THE bq29311
BQ2085DBTG4	TI	获取价格	SBS-COMPLIANT GAS GAUGE IC FOR USE WITH THE bq29311
BQ2085DBTR	TI	获取价格	SBS-COMPLIANT GAS GAUGE IC FOR USE WITH THE bq29311
BQ2085DBTRG4	TI	获取价格	SBS-COMPLIANT GAS GAUGE IC FOR USE WITH THE bq29311
BQ2085DBTR-V1P2G4	TI	获取价格	1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO38, GREEN, PLASTIC, TSSOP-38

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