SLUS784E December   2007  – December 2015 BQ24085 , BQ24086 , BQ24087 , BQ24088

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Options
  6. 6 Pin Configuration and Functions
  7. 7  Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Timing Requirements
    7. 7.7 Dissipation Ratings
    8. 7.8 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Control Logic Overview
      2. 8.3.2  Temperature Qualification (Applies Only to Versions With TS Pin Option)
      3. 8.3.3  Input Overvoltage Detection, Power Good Status Output
      4. 8.3.4  Charge Status Outputs
      5. 8.3.5  Battery Charging: Constant Current Phase
      6. 8.3.6  Charge Current Translator
      7. 8.3.7  Battery Voltage Regulation
      8. 8.3.8  Pre-Charge Timer
      9. 8.3.9  Thermal Protection Loop
      10. 8.3.10 Thermal Shutdown And Protection
      11. 8.3.11 Dynamic Timer Function
      12. 8.3.12 Charge Termination Detection and Recharge
      13. 8.3.13 Battery Absent Detection - Voltage Mode Algorithm
      14. 8.3.14 Charge Safety Timer
      15. 8.3.15 Short-Circuit Protection
      16. 8.3.16 Startup With Deeply Depleted Battery Connected
    4. 8.4 Device Functional Modes
      1. 8.4.1 Power Down
      2. 8.4.2 Sleep Mode
      3. 8.4.3 Overvoltage Lockout
      4. 8.4.4 Stand-By Mode
      5. 8.4.5 Begin Charge Mode
      6. 8.4.6 Charging Mode
      7. 8.4.7 Suspend Mode
      8. 8.4.8 LDO Mode Operation
      9. 8.4.9 State Machine Diagram
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 bq24086 and bq24088 Typical Application
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Selecting Input and Output Capacitor
          2. 9.2.1.2.2 Using Adapters With Large Output Voltage Ripple
          3. 9.2.1.2.3 Calculations
        3. 9.2.1.3 Application Curves
      2. 9.2.2 bq24085 Typical Application
        1. 9.2.2.1 Design Requirements
      3. 9.2.3 bq24087 Typical Application
        1. 9.2.3.1 Design Requirements
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
    3. 11.3 Thermal Considerations
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Related Links
    3. 12.3 Community Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

10 Power Supply Recommendations

The devices are designed to operate from an input voltage supply range between 3.5 V and 6.5 V and current capability of at least the maximum designed charge current. This input supply should be well regulated. If located more than a few inches from the bq24085/6/7/8 IN and GND terminals, a larger capacitor is recommended.