SLUS618I August   2004  – December 2014 BQ24031 , BQ24032A , BQ24038

UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Power Flow Diagram
  5. 5 Revision History
  6. 6 Description (continued)
  7. 7 Device Options
  8. 8 Pin Configuration and Functions
  9. 9 Specifications
    1. 9.1 Absolute Maximum Ratings
    2. 9.2 ESD Ratings
    3. 9.3 Recommended Operating Conditions
    4. 9.4 Thermal Information
    5. 9.5 Dissipation Ratings
    6. 9.6 Electrical Characteristics
    7. 9.7 Typical Characteristics
  10. 10Detailed Description
    1. 10.1 Overview
    2. 10.2 Functional Block Diagram
    3. 10.3 Feature Description
      1. 10.3.1  bq24038 Differences
      2. 10.3.2  Power-Path Management
        1. 10.3.2.1 Case 1: AC Mode (PSEL = High)
          1. 10.3.2.1.1 System Power
          2. 10.3.2.1.2 Charge Control
          3. 10.3.2.1.3 Dynamic Power-Path Management (DPPM)
        2. 10.3.2.2 Case 2: USB (PSEL = Low) bq24030/31/32A/38
          1. 10.3.2.2.1 System Power
          2. 10.3.2.2.2 Charge Control
          3. 10.3.2.2.3 Dynamic Power-Path Management (DPPM)
          4. 10.3.2.2.4 Battery Temperature Monitoring
      3. 10.3.3  Charge Status Outputs
      4. 10.3.4  ACPG, USBPG Outputs (Power Good), bq24030/31/32A/35
      5. 10.3.5  PG Output (Power Good), bq24038
      6. 10.3.6  CE Input (Chip Enable)
      7. 10.3.7  VBSEL Input (Battery Voltage Selection), bq24038
      8. 10.3.8  DPPM Used As A Charge Disable Function
      9. 10.3.9  Timer Fault Recovery
      10. 10.3.10 Short-Circuit Recovery
      11. 10.3.11 LDO Regulator
    4. 10.4 Device Functional Modes
      1. 10.4.1 Sleep Mode - V(IN) < VI(BAT)
      2. 10.4.2 Standby Mode - V(IN) > VI(BAT)and CE (Chip Enable) Pin = Low
      3. 10.4.3 Battery Charge Mode - V(IN) > VI(BAT), Battery Present, CE Pin = High and DPPM Pin Not Floating
        1. 10.4.3.1 Autonomous Power Source Selection, PSEL Control Pin
      4. 10.4.4 Charge Control
        1. 10.4.4.1 Battery Pre-Conditioning
        2. 10.4.4.2 Battery Charge Current
        3. 10.4.4.3 Battery Voltage Regulation
        4. 10.4.4.4 Power Handoff
        5. 10.4.4.5 Temperature Regulation and Thermal Protection
        6. 10.4.4.6 Charge Timer Operation
        7. 10.4.4.7 Charge Termination and Recharge
      5. 10.4.5 Boot-Up Sequence
  11. 11Application and Implementation
    1. 11.1 Application Information
    2. 11.2 Typical Application
      1. 11.2.1 Design Requirements
      2. 11.2.2 Detailed Design Procedure
        1. 11.2.2.1 Selecting the Input and Output Capacitors
      3. 11.2.3 Application Curves
  12. 12Power Supply Recommendations
  13. 13Layout
    1. 13.1 Layout Guidelines
    2. 13.2 Layout Example
    3. 13.3 Thermal Considerations
  14. 14Device and Documentation Support
    1. 14.1 Device Support
      1. 14.1.1 Third-Party Products Disclaimer
    2. 14.2 Documentation Support
      1. 14.2.1 Related Documentation
    3. 14.3 Related Links
    4. 14.4 Trademarks
    5. 14.5 Electrostatic Discharge Caution
    6. 14.6 Glossary
  15. 15Mechanical, Packaging, and Orderable Information

14 Device and Documentation Support

14.1 Device Support

14.1.1 Third-Party Products Disclaimer

TI'S PUBLICATION OF INFORMATION REGARDING THIRD-PARTY PRODUCTS OR SERVICES DOES NOT CONSTITUTE AN ENDORSEMENT REGARDING THE SUITABILITY OF SUCH PRODUCTS OR SERVICES OR A WARRANTY, REPRESENTATION OR ENDORSEMENT OF SUCH PRODUCTS OR SERVICES, EITHER ALONE OR IN COMBINATION WITH ANY TI PRODUCT OR SERVICE.

14.2 Documentation Support

14.2.1 Related Documentation

For related documentation see the following:

14.3 Related Links

The table below lists quick access links. Categories include technical documents, support and community resources, tools and software, and quick access to sample or buy.

Table 3. Related Links

PARTS PRODUCT FOLDER SAMPLE & BUY TECHNICAL DOCUMENTS TOOLS & SOFTWARE SUPPORT & COMMUNITY
bq24030 Click here Click here Click here Click here Click here
bq24031 Click here Click here Click here Click here Click here
bq24032A Click here Click here Click here Click here Click here
bq24035 Click here Click here Click here Click here Click here
bq24038 Click here Click here Click here Click here Click here

14.4 Trademarks

bqTINY is a trademark of Texas Instruments.

All other trademarks are the property of their respective owners.

14.5 Electrostatic Discharge Caution

esds-image

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.

14.6 Glossary

SLYZ022 — TI Glossary.

This glossary lists and explains terms, acronyms, and definitions.