BQ29405 用于 2、3 或 4 节锂电池电压保护（第 2 级保护）
BQ29405 描述
The bq29400, bq29400A, bq29401, and bq29405 are BiCMOS secondary protection ICs for 2-, 3-, or 4-cell Lithium-Ion battery packs that incorporate a high-accuracy precision over voltage detection circuit. They include a programmable delay circuit for over voltage detection time.
Each cell in a multiple cell pack is compared to an internal reference voltage. If one cell reaches an overvoltage condition, the protection sequence begins. The bq2940x device starts charging an external capacitor through the CD pin. When the CD pin voltage reaches 1.2 V, the OUT pin changes from a low level to a high level
|
BQ29400 |
BQ29401 |
BQ29405 |
| Cells Protected |
2, 3, 4 |
2, 3, 4 |
2, 3, 4 |
| Overvoltage Threshold(V) |
4.35 |
4.45 |
4.65 |
| Protection FETs |
External |
External |
External |
| Shutdown Current(uA) |
2 |
2 |
2 |
| Pin/Package |
8SM8, 8TSSOP |
8SM8, 8TSSOP |
8SM8 |
| Approx. Price (US$) |
0.42 | 1ku |
0.40 | 1ku |
0.55 | 1ku |
BQ29405 特性
- 2-, 3-, or 4-Cell Secondary Protection
- Low Power Consumption ICC < 2 uA [VCELL(ALL) <V(PROTECT)]
- High Accuracy Over Sense Voltage:
- BQ29400: 4.35 V ±25 mV
- BQ29405A: 4.40 V ±25 mV
- BQ29401: 4.45 V ±25 mV
- bq29405: 4.65 V ±25 mV
- Prefixed Protection Threshold Voltage
- Programmable Delay Time
- High Power Supply Ripple Rejection
- Stable During Pulse Charge Operation
- APPLICATIONS
- 2nd Level Protection in Lion Battery Packs in
- Notebook PCs
- Portable Instrumentation
- Medical and Test Equipment
BQ29405 芯片订购指南
| 器件 |
状态 |
温度 (oC) |
价格（美元） |
封装 | 引脚 |
封装数量 | 封装载体 |
丝印标记 |
| BQ29405DCT |
NRND |
-20 to 85 |
|
SM8 (DCT) | 8 |
|
|
| BQ29405DCT3 |
ACTIVE |
|
0.40 | 1ku |
SM8 (DCT) | 8 |
3000 | LARGE T&R |
|
| BQ29405DCT3E6 |
ACTIVE |
|
0.40 | 1ku |
SM8 (DCT) | 8 |
3000 | LARGE T&R |
|
| BQ29405PW |
ACTIVE |
-20 to 85 |
0.48 | 1ku |
TSSOP (PW) | 8 |
150 | TUBE |
|
| BQ29405PWR |
ACTIVE |
-20 to 85 |
0.40 | 1ku |
TSSOP (PW) | 8 |
2000 | LARGE T&R |
|
BQ29405 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 |
| BQ29405DCT3 |
Pb-Free (RoHS) |
CU SNBI |
Level-1-260C-UNLIM |
BQ29405DCT3 |
BQ29405DCT3 |
| BQ29405DCT3E6 |
Pb-Free (RoHS) |
CU SNBI |
Level-1-260C-UNLIM |
BQ29405DCT3E6 |
BQ29405DCT3E6 |
| BQ29405PW |
TBD |
CU NIPDAU |
Level-1-220C-UNLIM |
BQ29405PW |
BQ29405PW |
| BQ29405PWR |
TBD |
CU NIPDAU |
Level-1-220C-UNLIM |
BQ29405PWR |
BQ29405PWR |
BQ29405 应用技术支持与电子电路设计开发资源下载
- BQ29405 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)
- QFN Layout Guidelines (PDF 1279 KB)
- 笔记本电脑指南 (Rev. A) (PDF 2774 KB)
- 全面认识开关型电源中的BUCK-BOOST功率级 (Rev. A)
(PDF 2206 KB)
- PowerPADTM Made Easy (PDF 57 KB)
- 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)
BQ29405 相关工具