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BQ29449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:2-4 节串联锂离子/锂聚合物电池的二级过压保护 (4.30V)
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BQ29449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.

BQ29449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

BQ29449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
BQ29449具体的完整产品型号参数及价格(美元):

BQ29449的完整型号有:BQ29449DRBR、BQ29449DRBT,以下是这些产品的关键参数及官网采购报价:

BQ29449DRBR,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BQ29449DRBR的批量USD价格:.909(1000+)

BQ29449DRBT,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BQ29449DRBT的批量USD价格:1.067(1000+)

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BQ29449的评估套件:

BQ29449DRBR,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BQ29449DRBR的批量USD价格:.909(1000+)

BQ29449DRBT,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BQ29449DRBT的批量USD价格:1.067(1000+)

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