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BQ2040

更新时间： 2024-10-27 22:48:27

品牌	Logo	应用领域
德州仪器 - TI		仪表
页数	文件大小	规格书
33页	198K
描述
Gas Gauge IC With SMBus Interface

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中文翻译

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BQ2040 数据手册

bq2040

Gas Gauge IC With SMBus Interface

The bq2040 estimates battery self-

discharge based on an internal

Features

General Description

timer and temperature sensor and

The bq2040 Gas Gauge IC With

user-programmable rate informa-

SMBus Interface is intended for

tion stored in external EEPROM.

battery-pack or in-system installa-

The bq2040 also automatically re-

tion to maintain an accurate record

calibrates or “learns” battery capac-

of available battery charge. The

ity in the full course of a discharge

bq2040 directly supports capacity

cycle from full to empty.

➤ Provides accurate measurement

of available charge in NiCd,

NiMH, and Li-Ion batteries

➤ Supports SBS v1.0 data set and

two-wire interface

monitoring for NiCd, NiMH, and Li-

➤ Monitors charge FET in Li-Ion

Ion battery chemistries.

The bq2040 may operate directly

from three nickel chemistry cells.

With the REF output and an exter-

nal transistor, a simple, inexpensive

regulator can be built to provide

V_CCfor other battery cell configu-

rations.

pack protection circuit

The bq2040 uses the System Man-

agement Bus v1.0 (SMBus) protocol

and supports the Smart Battery

Data (SBData) commands. The

bq2040 also supports the SBData

charge control functions. Battery

state-of-charge, remaining capacity,

remaining time, and chemistry are

available over the serial link.

Battery-charge state can be directly

indicated using a four-segment LED

display to graphically depict battery

full-to-empty in 25% increments.

➤ Designed for battery pack inte-

gration

- ^{Low operating current}

- ^{Complete circuit can fit on less}

than ¾ square inch of PCB

space

An external EEPROM is used to

program initial values into the

bq2040 and is necessary for proper

operation.

➤ Supports SBS charge control

commands for NiCd, NiMH, and

Li-Ion

➤ Drives a four-segment LED dis-

play for remaining capacity

indication

➤ 16-pin narrow SOIC

Pin Connections

Pin Names

Battery sense input

V_CC

3.0–6.5V

PSTAT Protector status input

SMBD SMBus data input/output

SMBC SMBus clock

ESCL

EEPROM clock

OUT

ESDA EEPROM data

ESCL

ESDA

REF

LED_1-4LED segment 1-4

SMBC

SMBD

PSTAT

REF

Voltage reference output

EEPROM supply output

V_SS

System ground

LED

V_OUT

Sense resistor input

Display control input

DISP

16-Pin Narrow SOIC

PN204001.eps

SLUS005–JUNE 1999 E

12 3 4 5 6 7...33

中文翻译

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BQ2040 替代型号

型号	品牌	替代类型	描述	数据表
BQ34Z100-G1	TI	功能相似	多化合物 Impedance Track™ 独立电量监测计 \| 电池电量监测计

与BQ2040相关器件

型号	品牌	获取价格	描述	数据表
BQ2040SN	TI	获取价格	Gas Gauge IC With SMBus Interface
BQ2040SN-C408	TI	获取价格	Gas Gauge IC With SMBus Interface
BQ2040SN-C408TR	TI	获取价格	Gas Gauge IC With SMBus Interface
BQ2040SN-C408TRG4	TI	获取价格	1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16, GREEN, SOIC-16
BQ2040SN-D111	TI	获取价格	Gas Gauge IC With SMBus Interface
BQ2040SN-D111TR	TI	获取价格	Gas Gauge IC With SMBus Interface
BQ2040SN-D111TRG4	TI	获取价格	Gas Gauge IC With SMBus Interface
BQ2050	TI	获取价格	Lithium Ion Power Gauge⑩ IC
BQ2050H	TI	获取价格	Low-Cost Lithium Ion Power Gauge IC
BQ2050HSN	TI	获取价格	Low-Cost Lithium Ion Power Gauge IC

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