BQ2003
- Fast charge and conditioning of nickel cadmium or nickel-metal hydride batteries
- Hysteretic PWM switch-mode current regulation or gated control of an external regulator
- Easily integrated into systems or used as a stand-alone charger
- Pre-charge qualification of temperature and voltage
- Direct LED outputs display battery and charge status
- Fast-charge termination by V, maximum voltage, maximum temperature, and maximum time
- Optional top-off charge
The bq2003 Fast Charge IC provides comprehensive fast charge control functions together with high-speed switching power control circuitry on a monolithic CMOS device.
Integration of closed-loop current control circuitry allows the bq2003 to be the basis of a cost-effective solution for stand-alone and system-integrated chargers for batteries of one or more cells.
Switch-activated discharge-before-charge allows bq2003-based chargers to support battery conditioning and capacity determination.
High-efficiency power conversion is accomplished using the bq2003 as a hysteretic PWM controller for switch-mode regulation of the charging current. The bq2003 may alternatively be used to gate an externally regulated charging current.
Fast charge may begin on application of the charging supply, replacement of the battery, or switch depression. For safety, fast charge is inhibited unless/until the battery temperature and voltage are within configured limits.
Temperature, voltage, and time are monitored throughout fast charge. Fast charge is terminated by any of the following:
- Rate of temperature rise (t)
- Negative delta voltage (-V)
- Maximum voltage
- Maximum temperature
- Maximum time
After fast charge, an optional top-off phase is available. Constant-current maintenence charge is provided by an external trickle resistor.
技术文档
类型 | 标题 | 下载最新的英语版本 | 日期 | |||
---|---|---|---|---|---|---|
* | 数据表 | Fast-Charge IC 数据表 (Rev. A) | 2000年 2月 21日 | |||
用户指南 | DV2003L1 Fast Charge Development System Control of On-Board Linear Current | 1999年 9月 5日 | ||||
用户指南 | DV2003S1 Fast Charge Development System User's Guide | 1999年 9月 5日 | ||||
用户指南 | DV2003S2 Fast Charge Development System Control of On-Board n-FET Switch-Mode | 1999年 9月 5日 |
设计和开发
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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