单片充电和系统电源路径管理 IC - BQ24070

BQ24070 (正在供货)

单片充电和系统电源路径管理 IC

 

描述

The bq24070 and bq24071 are highly integrated Li-ion linear charger and system power-path management devices targeted at space-limited portable applications. The bq2407x devices offer DC supply (AC adapter) power-path management with autonomous power-source selection, power FETs and current sensors, high-accuracy current and voltage regulation, charge status, and charge termination, in a single monolithic device.

The bq2407x devices power the system while independently charging the battery. This feature reduces the charge and discharge cycles on the battery, allows for proper charge termination, and allows the system to run with an absent or defective battery pack. This feature also allows for the system to instantaneously turn on from an external power source in the case of a deeply discharged battery pack. The IC design is focused on supplying continuous power to the system when available from the AC adapter or battery sources.

特性

  • Small 3.5-mm × 4.5-mm VQFN Package
  • Designed for Single-Cell Li-Ion- or Li-Polymer-
    Based Portable Applications
  • Integrated Dynamic Power-Path Management (DPPM)
    Feature Allowing the AC Adapter to Simultaneously
    Power the System and Charge the Battery
  • Power Supplement Mode Allows Battery to Supplement
    the AC Input Current
  • Autonomous Power Source Selection (AC Adapter
    or BAT)
  • Supports Up to 2 A Total Current
  • Thermal Regulation for Charge Control
  • Charge Status Outputs for LED or System Interface
    Indicates Charge and Fault Conditions
  • Reverse Current, Short-Circuit, and Thermal
    Protection
  • Power Good Status Outputs
  • 4.4-V and 6-V Options for System Output Regulation
    Voltage

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参数 与其它产品相比 电池充电器 IC

 
Number of Series Cells
Function
Cell Chemistry
Battery Charge Voltage (Min) (V)
Battery Charge Voltage (Max) (V)
Features
Charge Current (Max) (A)
Control Interface
Control Topology
Rating
Operating Temperature Range (C)
Pin/Package
Operating Vin (Min) (V)
Operating Vin (Max) (V)
Absolute Vin (safety rating) (Max) ((V))
BQ24070 BQ24071
1    1   
Charger    Charger   
Li-Ion/Li-Polymer    Li-Ion/Li-Polymer   
4.2    4.2   
4.2    4.2   
Power Path
Temp Monitoring (Thermistor Pin)
Thermal Regulation   
Power Path
Temp Monitoring (Thermistor Pin)
Thermal Regulation   
1.5    1.5   
Standalone (RC-Settable)    Standalone (RC-Settable)   
Linear    Linear   
Catalog    Catalog   
-40 to 85    -40 to 85   
20VQFN    20VQFN   
4.35    4.35   
16    16   
18    18