BQ2018_TI 具有高速单总线接口 (HDQ) 的多化合物充电或放电计数器

BQ2018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：具有高速单总线接口 (HDQ) 的多化合物充电或放电计数器
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BQ2018的产品详情：

The bq2018 is a low-cost charge/discharge counter peripheral packaged in an 8-pin TSSOP or SOIC. It works with an intelligent host controller, providing state-of-charge information for rechargeable batteries.

The bq2018 measures the voltage drop across a low-value series sense resistor between the negative terminal of the battery and the battery pack ground contact. By using the accumulated counts in the charge, discharge, and self-discharge registers, an intelligent host controller can determine battery state-of-charge information. To improve accuracy, an offset count register is available. The system host controller is responsible for the register maintenance by resetting the charge in/out and self-discharge registers as needed.

The bq2018 also features 128 bytes of NVRAM registers. The upper 13 bytes of NVRAM contain the capacity monitoring and status information. The RBI input operates from an external power storage source such as a capacitor or a series cell in the battery pack, providing register nonvolatility for periods when the battery is shorted to ground or when the battery charge state is not sufficient to operate the bq2018. During this mode, the register backup current is less than 100nA.

Packaged in an 8-pin TSSOP or SOIC, the bq2018 is small enough to fit in the crevice between two A-size cells or within the width of a prismatic cell.

BQ2018的优势和特性：

Multifunction charge/discharge counter
Resolves signals less than 12.5uV
Internal offset calibration improves accuracy
1024 bits of NVRAM configured as 128 x 8
Internal temperature sensor for self-discharge estimation
Single-wire serial interface
Dual operating modes: - Operating: <80uA - Sleep: <10uA
REG output for low-cost microregulation
Internal timebase eliminates external components
8-pin TSSOP or SOIC allows battery pack integration

BQ2018的参数（英文）：

Cell chemistry
Lead Acid, Li-Ion/Li-Polymer, NiCd, NiMH
Number of series cells
Single Cell
Communication interface
HDQ
Battery capacity (Min) (mAh)
1000
Battery capacity (Max) (mAh)
4500
Implementation
Pack
External capacity indication
None
Features
Coulomb Counter
Operating temperature range (C)
-20 to 70
Cell balancing
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BQ2018具体的完整产品型号参数及价格（美元）：

BQ2018的完整型号有：BQ2018SN-E1、BQ2018SN-E1TR、BQ2018TS-E1、BQ2018TS-E1TR，以下是这些产品的关键参数及官网采购报价：

BQ2018SN-E1，工作温度：-20 to 70，封装：SOIC (D)-8，包装数量MPQ：75个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网BQ2018SN-E1的批量USD价格：8.451（1000+）

BQ2018SN-E1TR，工作温度：-20 to 70，封装：SOIC (D)-8，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网BQ2018SN-E1TR的批量USD价格：7.395（1000+）

BQ2018TS-E1，工作温度：-20 to 70，封装：TSSOP (PW)-8，包装数量MPQ：150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BQ2018TS-E1的批量USD价格：6.29（1000+）

BQ2018TS-E1TR，工作温度：-20 to 70，封装：TSSOP (PW)-8，包装数量MPQ：2000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BQ2018TS-E1TR的批量USD价格：5.451（1000+）

BQ2018的评估套件：

BQ2018的电路图解：

BQ2018的评估套件：