BQ29312A
- 2-, 3-, or 4-Cell Series Protection Control
- Can Directly Interface With the bq2084 Gas Gauges
- Provides Individual Cell Voltages and Battery Voltage to Battery Management Host
- Integrated Cell Balancing Drive
- I2C Compatible User Interface Allows Access to Battery Information
- Programmable Threshold and Delay for Overload and Short Circuit During Charge and Discharge
- System Alert Interrupt Output
- Host Control Can Initiate Sleep Power Mode and Ship Mode
- Integrated 3.3-V, 25-mA LDO
- Supply Voltage Range From 4.5 V to 25 V
- Low Supply Current of 60-µA Typical
- bq29312A is 100% specification compatible with the bq29312
- APPLICATIONS
- Notebook PCs
- Medical and Test Equipment
- Portable Instrumentation
The bq29312A is a 2-, 3-, or 4-cell lithium-ion battery pack protection analog front end (AFE) IC that incorporates a 3.3-V, 25-mA low-dropout regulator (LDO). The bq29312A also integrates an I2C compat- ible interface to extract battery parameters such as cell voltages and control output status. Other par- ameters such as current protection thresholds and delays can be programmed into the bq29312A to increase the flexibility of the battery management system.
The bq29312A provides safety protection for over- charge, overload, short-circuit, overvoltage, and undervoltage conditions with the battery management host. In overload and short-circuit conditions, the bq29312A turns the FET drive off autonomously dependant on the internal configuration setting.
The communications interface allows the host to observe and control the current status of the bq29312A. It enables cell balancing, enters different power modes, sets overload levels, sets the overload blanking delay time, sets short-circuit threshold levels for charge and discharge, and sets the short-circuit blanking delay time.
Cell balancing of each cell is performed via a cell bypass path, which is enabled via the internal control register accessible via the I2C compatible interface. The maximum bypass current is set via an external series resistor and internal FET on resistance (typical 400 ).
技术文档
类型 | 标题 | 下载最新的英语版本 | 日期 | |||
---|---|---|---|---|---|---|
* | 数据表 | Two-Cell Three-Cell & Four Cell Lithium-Ion or Lithium-Polymer Battery Protect 数据表 (Rev. A) | 2005年 8月 30日 | |||
* | 勘误表 | bq20z80-V110 Technical Reference Manual | 2007年 4月 5日 | |||
用户指南 | bq20z80-V110 + bq29312A Chipset | 2007年 7月 31日 | ||||
应用手册 | Impedance Track(TM) Gas Gauge for Novices | 2006年 1月 30日 | ||||
应用手册 | Comparing the bq29312A to the bq29312 | 2005年 3月 7日 |
设计和开发
如需其他信息或资源,请点击以下任一标题进入详情页面查看(如有)。
封装 | 引脚 | 下载 |
---|---|---|
TSSOP (PW) | 24 | 查看选项 |
VQFNP (RTH) | 24 | 查看选项 |
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
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