- 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：具有单总线 (DQ) 接口、5 个 LED 驱动器、控制信号的镍镉电池/镍氢电池电量监测计，适用于 BQ2004 快速充电 IC
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The bq2014 Gas Gauge IC is intended for battery-pack or in-system installation to maintain an accurate record of available battery charge. The IC monitors the voltage drop across a sense resistor connected in series between the negative battery terminal and ground to determine charge and discharge activity of the battery.
Self-discharge of NiMH and NiCd batteries is estimated based on an internal timer and temperature sensor. Compensations for battery temperature and rate of charge or discharge are applied to the charge, discharge, and self-discharge calculations to provide available charge information across a wide range of operating conditions. Battery capacity is automatically recalibrated, or "learned," in the course of a discharge cycle from full to empty.
The bq2014 includes a charge control output that controls an external Fast Charge IC such as the bq2004.
Nominal Available Charge (NAC) may be directly indicated using a five-segment LED display.
The bq2014 supports a simple single-line bidirectional serial link to an external processor (with a common ground). The bq2014 outputs battery information in response to external commands over the serial link.
Internal registers include available charge, temperature, capacity, battery voltage, battery ID, battery status, and programming pin settings. To support subassembly testing, the outputs may also be controlled. The external processor may also overwrite some of the bq2014 gas gauge data registers.
The bq2014 may operate directly from three or four cells. With the REF output and an external transistor, a simple, inexpensive regulator can be built to provide VCC across a greater number of cells.
- Conservative and repeatable measurement of available charge in rechargeable batteries
- Charge control output operates an external charge controller such as the bq2004 Fast Charge IC
- Designed for battery pack integration
- 120μA typical standby current
- Display capacity via single-wire serial communication port or direct drive of LEDs
- Measurements compensated for current and temperature
- Self-discharge compensation using internal temperature sensor
- User-selectable end-of-discharge threshold
- Battery voltage, nominal available charge, temperature, etc. available over serial port
- 16-pin narrow SOIC
- Cell chemistry
- NiCd, NiMH
- Number of series cells
- 2-4 Cells
- Communication interface
- DQ
- Battery capacity (Min) (mAh)
- 500
- Battery capacity (Max) (mAh)
- 6000
- Implementation
- Pack
- External capacity indication
- LED
- Features
- Coulomb Counter
- Operating temperature range (C)
- 0 to 70
- Cell balancing
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BQ2014的完整型号有：BQ2014SN-D120TR、BQ2014SN-D120，以下是这些产品的关键参数及官网采购报价：
BQ2014SN-D120TR，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BQ2014SN-D120TR的批量USD价格：9.25（1000+）
BQ2014SN-D120，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BQ2014SN-D120的批量USD价格：10.673（1000+）
BQ2014SN-D120TR，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BQ2014SN-D120TR的批量USD价格：9.25（1000+）
BQ2014SN-D120，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BQ2014SN-D120的批量USD价格：10.673（1000+）
