BQ24070 Li-Ion Charger with Dynamic Power-Path Management, Output regulated to 4.4V | TI.com

BQ24070 (ACTIVE) Li-Ion Charger with Dynamic Power-Path Management, Output regulated to 4.4V

 

Description

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.

Features

  • 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

Parametrics

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Part number Order Number of series cells Function Cell chemistry Charge current (Max) (A) Operating Vin (Min) (V) Operating Vin (Max) (V) Absolute Vin (safety rating) (Max) ((V)) Battery charge voltage (Min) (V) Battery charge voltage (Max) (V) Features Control interface Control topology Rating Operating temperature range (C) Package Group Package size: mm2:W x L (PKG)
BQ24070 Order now 1     Charger     Li-Ion/Li-Polymer     1.5     4.35     16     18     4.2     4.2     Power Path
Temp Monitoring (Thermistor Pin)
Thermal Regulation
UVLO    
Standalone (RC-Settable)     Linear     Catalog     -40 to 85     VQFN | 20     20VQFN: 16 mm2: 3.5 x 4.5 (VQFN | 20)    
BQ24071 Order now 1     Charger     Li-Ion/Li-Polymer     1.5     4.35     16     18     4.2     4.2     Power Path
Temp Monitoring (Thermistor Pin)
Thermal Regulation
UVLO    
Standalone (RC-Settable)     Linear     Catalog     -40 to 85     VQFN | 20     20VQFN: 16 mm2: 3.5 x 4.5 (VQFN | 20)