BQ24315 (ACTIVE)

Overvoltage & Overcurrent Protection IC & Li+ Charger Front-End Protection IC

Overvoltage & Overcurrent Protection IC & Li+ Charger Front-End Protection IC - BQ24315
 

Description

The bq24313 and bq24315 are highly integrated circuits designed to provide protection to Li-ion batteries from failures of the charging circuit. The IC continuously monitors the input voltage, the input current, and the battery voltage. The output acts as a linear regulator. The output is regulated to VO(REG) for inputs between VO(REG) and the overvoltage threshold. If an input overvoltage condition occurs, the IC immediately removes power from the charging circuit by turning off an internal switch. In the case of an overcurrent condition, it limits the system current at the threshold value, and if the overcurrent persists, switches the pass element OFF after a blanking period. Additionally, the IC also monitors its own die temperature and switches off if it exceeds 140°C. The input overcurrent threshold is user-programmable.

The IC can be controlled by a processor and also provides status information about fault conditions to the host.

Features

  • Provides Protection for Three Variables:
    • Input Overvoltage, with Rapid Response in < 1 µs
    • User-Programmable Overcurrent with Current Limiting
    • Battery Overvoltage
  • 30V Maximum Input Voltage
  • Supports up to 1.5A Input Current
  • Robust Against False Triggering Due to Current Transients
  • Thermal Shutdown
  • Enable Input
  • Status Indication — Fault Condition
  • 5.5V LDO Mode Voltage Regulation
  • Available in Space-Saving Small 8 Lead 2mm ×2mm SON
  • APPLICATIONS
    • Mobile Phones and Smart Phones
    • PDAs
    • MP3 Players
    • Low-Power Handheld Devices
    • Bluetooth Headsets

PowerPAD Is a trademark of Texas Instruments

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Parametrics Compare all products in Battery Monitor, Protection & Authentication Solutions

 
Function
Number of Series Cells (Min)
Number of Series Cells (Max)
Input Over-Current Protection (A)
Input Over-Voltage Protection (V)
Communication Interface
Features
Typical Operating Current (Typ) (uA)
Rating
Vin (Max) (V)
Pin/Package
BQ24315 BQ24308 BQ24311 BQ24312 BQ24313 BQ24314 BQ24314A BQ24314C BQ24316
Charger Front-End Protection    Charger Front-End Protection    Charger Front-End Protection    Charger Front-End Protection    Charger Front-End Protection    Charger Front-End Protection    Charger Front-End Protection    Charger Front-End Protection    Charger Front-End Protection   
1    1    1    1    1    1    1    1    1   
1    1    1    1    1    1    1    1    1   
1    0.7    0.125    1.5    1    1    1    1    1   
5.85    6.3    5.85    5.85    10.5    5.85    5.85    5.85    6.8   
No Communication    No Communication    No Communication    No Communication    No Communication    No Communication    No Communication    No Communication    No Communication   
Over-voltage (OV)    Over-voltage (OV)    Over-voltage (OV)    Over-voltage (OV)    Over-voltage (OV)    Over-voltage (OV)    Over-voltage (OV)    Over-voltage (OV)    Over-voltage (OV)   
400    410    400    400    400    400    400    400    400   
Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog   
30    30    30    30    30    30    30    30    30   
8WSON    8WSON    8WSON    8WSON    8WSON    12VSON
8WSON   
8WSON    8WSON    12VSON
8WSON