BQ29441_TI 用于 2 节、3 节或 4 节锂离子电池的电压保护 (4.40V)

BQ29441的基本参数

制造厂商：TI
产品类别：电源管理
技术类目：电池管理 IC - 电池保护器
功能描述：用于 2 节、3 节或 4 节锂离子电池的电压保护 (4.40V)
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BQ29441的产品详情：

The bq2944x is a secondary overvoltage protection IC for 2-series, 3-series, or 4-series cell Li-Ion battery packs that incorporates a high-accuracy precision overvoltage detection circuit.

FUNCTION

The voltage of each cell in a battery pack is compared to an internal reference voltage. If any cells reach an overvoltage condition, the bq2944x 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 a low state to a high state. An optional latch configuration is available that holds the OUT pin in a high state indefinitely after an overvoltage condition has satisfied the specified delay timer period. The latch is released when the CD pin is shorted to GND.

BQ29441的优势和特性：

2-Series, 3-Series, or 4-Series Cell Secondary Protection
External Capacitor-Controlled Delay Timer
Low Power Consumption ICC < 2μA Typical [VCELL(ALL) < VPROTECT]
High-Accuracy Overvoltage Protection: ±25 mV with TA = 0°C to 60°C
Fixed Overvoltage Protection Thresholds: 4.30V, 4.35V, 4.40V, 4.45V, 4.50V
Small 8L QFN Package
APPLICATIONS
- Second-Level Protection in Li-Ion Battery Packs
  - Notebook Computers
  - Power Tools
  - Portable Equipment and Instrumentation

BQ29441的参数（英文）：

Function
Protection
Number of series cells (Min)
2, 3, 4
Number of series cells (Max)
3, 4
Features
Overvoltage, Single pin output drive
Typical operating current (Typ) (uA)
2
Rating
Catalog
Vin (Max) (V)
28

BQ29441具体的完整产品型号参数及价格（美元）：

BQ29441的完整型号有：BQ29441DRBR、BQ29441DRBT，以下是这些产品的关键参数及官网采购报价：

BQ29441DRBR，工作温度：-40 to 85，封装：SON (DRB)-8，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网BQ29441DRBR的批量USD价格：0.909（1000+）

BQ29441DRBT，工作温度：-40 to 85，封装：SON (DRB)-8，包装数量MPQ：250个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网BQ29441DRBT的批量USD价格：1.067（1000+）

BQ29441的评估套件：

BQ29441的电路图解：

BQ29441的评估套件：