BQ2969
- 2-series, 3-series, and 4-series cell overvoltage protection (OVP)
- Factory programmed OVP threshold (3.6V to 5.2V) with ±12mV accuracy
- Fixed delay timer to trigger FET drive output (0.25s to 6.5s options)
- Output pin options:
- Active high
- Open-drain - active pulldown
- Open-drain - inactive pulldown
- Integrated 3mA regulated output programmable to 3.8V, 3.3V, 3.15V, 3.0V, 2.5V, 1.8V, or 1.5V
- Factory programmed undervoltage (UV) detection threshold (1V to 4.15V) to disable regulator
- OVP remains operational even in undervoltage condition
- Multiple power modes:
- NORMAL mode - no OV or UV: ICC ≅ 1.23µA
- Undervoltage mode - UV detected: ICC ≅ 0.25µA
- Overvoltage mode - OV detected: ICC ≅ 19µA
- Low leakage current per cell input < 100nA
- Small package footprint
- 8-Pin WSON (2mm × 2mm)
The BQ2969 family is a high-accuracy, low-power overvoltage protector with a 3mA regulated output supply for Li-ion and LiFePO4 (LFP) battery pack applications.
Each cell in a 2-series to 4-series cell stack is individually monitored for an overvoltage condition. An internally fixed-delay timer is initiated upon detection of an overvoltage condition on any cell. Upon expiration of the delay timer, the output pin is triggered into an active state to indicate that an overvoltage condition has occurred.
The regulated output supply delivers up to 3mA output current to drive always-on circuits, such as a real-time clock (RTC) oscillator. The BQ2969 family has a self-disable function to turn off the regulated output if any cell voltage falls below a programmable undervoltage threshold, thereby preventing drain on the battery.
The BQ2969 family provides exceptionally low power operation, drawing only 1.23µA during normal operation (excluding regulator load current), and dropping to 0.25uA when in an undervoltage condition. Even when in the undervoltage state, the device can still detect an overvoltage condition on any other cell (which can occur in an imbalanced pack) and can assert the output pin.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | BQ2969 Overvoltage Protection for 2-Series, 3-Series, and 4-Series Cell Li-Ion Batteries with Regulated Output Supply datasheet | PDF | HTML | 2024年 8月 2日 |
| EVM User's guide | BQ2969 Evaluation Module User's Guide | PDF | HTML | 2023年 6月 24日 |
設計與開發
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BQ2969EVM — BQ2969 評估模組
BQ2969EVM 評估模組 (EVM) 是適用於 BQ2969 的完整評估系統，BQ2969 為具備整合式 LDO 的高準確度、低功率過電壓保護器，適用於 2 串聯至 4 串聯鋰離子和 LiFePO4 電池組。此 EVM 包含 BQ2969 電路模組，用於對 BQ2969 的保護功能進行簡易評估。電路模組包含一個 BQ2969 積體電路 (IC)，以及可在 4 串聯電池芯鋰離子或鋰聚合物電池組中出現過充電和過放電等情況時，發出訊號所需的其他所有板載零組件。電路模組直接連接電池中的電池芯，或可與電源供應器和隨附的電池芯模擬器電阻器連接。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| WSON (DSG) | 8 | Ultra Librarian |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中持續性的可靠性監測
- 晶圓廠位置
- 組裝地點
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。