BQ2040_TI 符合智能电池系统 (SBS) 1.0 标准的多化合物电量监测计，具有 4 个 LED 驱动器

BQ2040的基本参数

制造厂商：TI
产品类别：电源管理
技术类目：电池管理 IC - 电池电量监测
功能描述：符合智能电池系统 (SBS) 1.0 标准的多化合物电量监测计，具有 4 个 LED 驱动器
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BQ2040的产品详情：

The bq2040 Gas Gauge IC With SMBus Interface is intended for battery-pack or in-system installation to maintain an accurate record of available battery charge. The bq2040 directly supports capacity monitoring for NiCd, NiMH, and Li-Ion battery chemistries.

The bq2040 uses the System Management 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.

The bq2040 estimates battery self-discharge based on an internal timer and temperature sensor and user-programmable rate information stored in external EEPROM. The bq2040 also automatically recalibrates or \x93learns\x94 battery capacity in the full course of a discharge cycle from full to empty.

The bq2040 may operate directly from three nickel chemistry cells. With the REF output and an external transistor, a simple, inexpensive regulator can be built to provide V_CC for other battery cell configurations.

An external EEPROM is used to program initial values into the bq2040 and is necessary for proper operation.

BQ2040的优势和特性：

Provides accurate measurement of available charge in NiCd, NiMH, and Li-Ion batteries
Supports SBS v1.0 data set and two-wire interface
Monitors charge FET in Li-Ion pack protection circuit
Designed for battery pack integration - Low operating current - Complete circuit can fit on less than 3/4 square inch of PCB space
Supports SBS charge control commands for NiCd, NiMH, and Li-Ion
Drives a four-segment LED display for remaining capacity indication
16-pin narrow SOIC

BQ2040的参数（英文）：

Cell chemistry
Lead Acid, Li-Ion/Li-Polymer, NiCd, NiMH
Number of series cells
2-4 Cells
Communication interface
SMBus
Battery capacity (Min) (mAh)
800
Battery capacity (Max) (mAh)
10000
Implementation
Pack
External capacity indication
LED
Features
Coulomb Counter
Operating temperature range (C)
0 to 70
Cell balancing
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BQ2040具体的完整产品型号参数及价格（美元）：

BQ2040的完整型号有：BQ2040SN-C408、BQ2040SN-D111、BQ2040SN-D111TR，以下是这些产品的关键参数及官网采购报价：

BQ2040SN-C408，工作温度：0 to 70，封装：SOIC (D)-16，包装数量MPQ：40个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网BQ2040SN-C408的批量USD价格：8.933（1000+）

BQ2040SN-D111，工作温度：0 to 70，封装：SOIC (D)-16，包装数量MPQ：40个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网BQ2040SN-D111的批量USD价格：10.362（1000+）

BQ2040SN-D111TR，工作温度：0 to 70，封装：SOIC (D)-16，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网BQ2040SN-D111TR的批量USD价格：8.933（1000+）

BQ2040的评估套件：

BQ2040的电路图解：

BQ2040的评估套件：