BQ29413
- 2-, 3-, or 4-Cell Secondary Protection
- Low Power Consumption ICC < 2 µA [VCELL(ALL) < V(PROTECT)]
- Fixed High Accuracy Overvoltage Protection Threshold
- bq29410 = 4.35 V
- bq29411 = 4.40 V
- bq29412 = 4.45 V
- bq29413 = 4.50 V
- bq29414 = 4.55 V
- bq29415 = 4.60 V
- bq29419 = 4.30 V
- Programmable Delay Time of Detection
- High Power Supply Ripple Rejection
- Stable During Pulse Charge Operation
- APPLICATIONS
- 2nd-Level Overvoltage Protection in Li-Ion Battery Packs in:
- Notebook Computers
- Portable Instrumentation
- Portable Equipment
- 2nd-Level Overvoltage Protection in Li-Ion Battery Packs in:
The bq2941x is a secondary overvoltage protection IC for 2-, 3-, or 4-cell lithium-ion battery packs that incorporates a high-accuracy precision overvoltage detection circuit. It includes a programmable delay circuit for overvoltage detection time.
FUNCTION
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 bq2941x 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.
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| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | Voltage Protection for 2-, 3-, or 4-Cell Li-Ion Batteries (2nd Level Protection) datasheet (Rev. G) | 2008/8/18 | |||
| 應用說明 | Stacking Multiple bqq2941x Li-Ion Secondary Voltage Protectors | 2007/8/27 |
設計與開發
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| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| TSSOP (PW) | 8 | Ultra Librarian |
| SSOP (DCT) | 8 | Ultra Librarian |