SLUS763D July   2007  – April 2016

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Timing Requirements
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Power Down
      2. 7.3.2 Power-On Reset
      3. 7.3.3 Operation
        1. 7.3.3.1 Input Overvoltage Protection
        2. 7.3.3.2 Input Overcurrent Protection
        3. 7.3.3.3 Battery Overvoltage Protection
        4. 7.3.3.4 Thermal Protection
        5. 7.3.3.5 Enable Function
        6. 7.3.3.6 Fault Indication
    4. 7.4 Device Functional Modes
      1. 7.4.1 OPERATION Mode
      2. 7.4.2 POWER-DOWN Mode
      3. 7.4.3 POWER-ON RESET Mode
  8. 8 Applications and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Selection of RBAT
        2. 8.2.2.2 Selection of RCE, RFAULT, and RPU
        3. 8.2.2.3 Selection of Input and Output Bypass Capacitors
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
    1. 9.1 Powering Accessories
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Related Links
    2. 11.2 Community Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • DSG|8
Thermal pad, mechanical data (Package|Pins)
Orderable Information

1 Features

  • Provides Protection for Three Variables:
    • Input Overvoltage, With Rapid Response in
      < 1 μs
    • User-Programmable Overcurrent With Current Limiting
    • Battery Overvoltage
  • 30-V Maximum Input Voltage
  • Supports up to 1.5-A Input Current
  • Robust Against False Triggering Due to Current Transients
  • Thermal Shutdown
  • Enable Input
  • Status Indication – Fault Condition
  • Available in Space-Saving Small 8-Pin 2 × 2 SON and 12-Pin 4 × 3 SON Packages

2 Applications

  • Mobile Phones and Smart Phones
  • PDAs
  • MP3 Players
  • Low-Power Handheld Devices
  • Bluetooth™ Headsets

3 Description

The bq24314 and bq24316 devices 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. In case of an input overvoltage condition, 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 becomes too hot. 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.

Device Information (1)

PART NUMBER PACKAGE BODY SIZE (NOM)
bq24314
bq24316		 WSON (8) 2.00 mm × 2.00 mm
VSON (8) 3.00 mm × 4.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Application Schematic

bq24314 bq24316 typ_sch_lus763.gif