BQ29209 具有自动电量平衡功能的电压保护，用于 2 节锂离子电池，OVP=4.30V
BQ29209 描述
The bq2920x device is a secondary overvoltage protection IC for two-series cell lithium-ion battery packs that incorporates a high-accuracy precision overvoltage detection circuit and automatic cell imbalance correction.
The voltage of each cell in a two-series cell battery pack is compared to an internal reference voltage. If either cell reaches an overvoltage condition, the bq2920x device starts a timer that provides a delay proportional to the capacitance on the CD pin. Upon expiration of the internal timer, the OUT pin changes from low to high state.
If enabled, the bq2920x will perform automatic cell imbalance correction where the two cells are automatically corrected for voltage imbalance by loading the cell with the higher charge voltage with a small balancing current
|
BQ29200 |
BQ29209 |
| Cells Protected |
2 |
2 |
| Overvoltage Threshold(V) |
4.35 |
4.3 |
| Pin/Package |
8SON |
8SON |
| Approx. Price (US$) |
0.30 | 1ku |
0.30 | 1ku |
BQ29209 特性
- 2-Series Cell Secondary Protection
- Automatic Cell Imbalance Correction with External Enable Control
- ±30 mV Enable, 0 mV Disable
Thresholds Typical
- External Capacitor-Controlled Delay Timer
- External Resistor-Controlled Cell Balance Current
- Low Power Consumption ICC < 3 uA Typical
(VCELL(ALL) < VPROTECT)
- High-Accuracy Overvoltage Protection:
- ±25 mV with TA = 0°C to 60°C
- Fixed Overvoltage Protection Thresholds:
4.30 V, 4.35 V
- Small 8L DRB Package
- APPLICATIONS
- 2nd Level Protection in Li-Ion Battery Packs
- Netbook Computers
- Power Tools
- Portable Equipment and Instrumentation
- Battery Backup Systems
BQ29209 芯片订购指南
| 器件 |
状态 |
温度 |
价格（美元） |
封装 | 引脚 |
封装数量 | 封装载体 |
丝印标记 |
| BQ29209DRBR |
ACTIVE |
-40 to 85 |
0.30 | 1ku |
SON (DRB) | 8 |
3000 | LARGE T&R |
209 |
| BQ29209DRBT |
ACTIVE |
-40 to 85 |
0.35 | 1ku |
SON (DRB) | 8 |
250 | SMALL T&R |
209 |
BQ29209 质量与无铅数据
| 器件 |
环保计划* |
铅/焊球涂层 |
MSL 等级/回流焊峰 |
环保信息与无铅 (Pb-free) |
DPPM / MTBF / FIT 率 |
| BQ29209DRBR |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-250C-1 YEAR |
BQ29209DRBR |
BQ29209DRBR |
| BQ29209DRBT |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-250C-1 YEAR |
BQ29209DRBT |
BQ29209DRBT |
BQ29209 应用技术支持与电子电路设计开发资源下载
- BQ29209 数据资料 dataSheet 下载.PDF
- TI 德州仪器电池管理产品选型与价格 . xls
- 照明和显示屏电源选择指南 (PDF 1427 KB)
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(PDF 2206 KB)
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- 标准线性产品交叉参考 (Rev. D)
(PDF 1058 KB)
- 模数规格和性能特性术语表 (Rev. A) (PDF 1993 KB)
- 所选封装材料的热学和电学性质 (PDF 645 KB)
- 高速数据转换 (PDF 1967 KB)
BQ29209 相关工具
| 名称 |
型号 |
公司 |
工具/软件类型 |
| BQ29209 评估模块 |
BQ29209EVM |
Texas Instruments |
开发电路板/EVM |