BQ2014H
- Accurate measurement of available capacity in NiCd or NiMH batteries
- Low-cost battery management solution for pack integration
- As little as ½ square inch of PCB for complete circuit
- Low operating current (120µA typical)
- Less than 100nA of data retention current
- High-speed (5kb/s) single-wire communication interface (HDQ bus) for critical battery parameters
- Communication with an external charge controller such as the bq2004
- Direct drive of remaining capacity LEDs
- Automatic rate and temperature compensation of measurements
- 16-pin narrow SOIC
The bq2014H NiCd/NiMH Gas Gauge IC is intended for batterypack or in-system installation to maintain an accurate record of available battery capacity. The IC monitors a 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. Compensations for battery temperature, self-discharge, and rate of discharge are applied to the charge counter to provide available capacity 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.
Nominal available capacity may be directly indicated using a five-segment LED display. The bq2014H also supports a simple single-line bidirectional serial link to an external processor (common ground). The 5kb/s HDQ bus interface reduces communications overhead in the external microcontroller.
Internal registers include available capacity and energy, temperature, voltage and current, and battery status. The external processor may also overwrite some of the bq2014H gas gauge data registers.
The bq2014H can operate from the batteries in the pack. The REF output and an external transistor allow a simple, inexpensive voltage regulator to supply power to the circuit from the cells.
技术文档
类型 | 标题 | 下载最新的英语版本 | 日期 | |||
---|---|---|---|---|---|---|
* | 数据表 | Low-Cost NiCD/NiMH Gas Gauge IC 数据表 (Rev. A) | 2003年 10月 31日 | |||
选择指南 | 电源管理指南 2018 (Rev. K) | 2018年 7月 31日 | ||||
应用手册 | HDQ Communication Basics (Rev. A) | 2008年 9月 18日 | ||||
应用手册 | HDQ Communication Basics for TI Battery Monitor ICs | 2001年 5月 16日 |
设计和开发
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封装 | 引脚 | CAD 符号、封装和 3D 模型 |
---|---|---|
SOIC (D) | 16 | Ultra Librarian |
订购和质量
- RoHS
- REACH
- 器件标识
- 引脚镀层/焊球材料
- MSL 等级/回流焊峰值温度
- MTBF/时基故障估算
- 材料成分
- 鉴定摘要
- 持续可靠性监测
- 制造厂地点
- 封装厂地点