SLUSBI8B January   2014  – May 2017

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  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 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 Undervoltage Lockout
      2. 8.3.2 Power On
      3. 8.3.3 Power-Path Management
        1. 8.3.3.1 Input Source Connected - Adapter or USB
          1. 8.3.3.1.1 Input DPM Mode, VIN-DPM
          2. 8.3.3.1.2 DPPM Mode
          3. 8.3.3.1.3 Battery Supplement Mode
        2. 8.3.3.2 Input Source Not Connected
      4. 8.3.4 Battery Charging
        1. 8.3.4.1 Charge Current Translator
        2. 8.3.4.2 Battery Detection and Recharge
        3. 8.3.4.3 Termination Disable (TD Input, bq24230H)
        4. 8.3.4.4 Adjustable Termination Threshold (ITERM Input, bq24232H)
        5. 8.3.4.5 Dynamic Charge Timers (TMR Input)
        6. 8.3.4.6 Status Indicators (PGOOD, CHG)
          1. 8.3.4.6.1 Timer Fault
        7. 8.3.4.7 Thermal Regulation and Thermal Shutdown
      5. 8.3.5 Battery Pack Temperature Monitoring
    4. 8.4 Device Functional Modes
      1. 8.4.1 Explanation of Deglitch Times and Comparator Hysteresis
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Calculations
          1. 9.2.2.1.1 Program the Fast-Charge Current (ISET):
          2. 9.2.2.1.2 Program the Input Current Limit (ILIM)
          3. 9.2.2.1.3 Program the Termination Current Threshold (ITERM)
          4. 9.2.2.1.4 Program 6.25-Hour Fast-Charge Safety Timer (TMR)
        2. 9.2.2.2 TS Function
        3. 9.2.2.3 CHG and PGOOD
        4. 9.2.2.4 Selecting IN, OUT, AND BAT Pin Capacitors
        5. 9.2.2.5 Sleep Mode
      3. 9.2.3 Application Curves
    3. 9.3 System Examples
      1. 9.3.1 Stand-Alone Charger
  10. 10Power Supply Recommendations
    1. 10.1 Requirements for OUT Output
    2. 10.2 USB Sources and Standard AC Adapters
    3. 10.3 Half-Wave Adapters
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
    3. 11.3 Thermal Package
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Related Links
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

10 Power Supply Recommendations

10.1 Requirements for OUT Output

To provide an output voltage on SYS, the bq2423xH require either a power supply from 4.35 V to 6.0 V input for bq24230H and from 4.35 V to 10 V for bq24232H to fully charge a battery.The supply must have at least 100 mA current rating connected to IN; or, a single-cell Li-Ion battery with voltage > VBATUVLO connected to BAT. The source current rating needs to be at least 1.5 A in order to provide maximum output current to SYS.

10.2 USB Sources and Standard AC Adapters

In order for charging to occur the source voltage measured at the IN terminals of the IC, factoring in cable/trace losses from the source, must be greater than the VINDPM threshold (in USB mode), but less than the maximum values shown above. The current rating of the source must be higher than the load requirements for OUT in the application. For charging at a desired charge current of ICHRG, IIN > (ISYS+ ICHRG). The charger limits IIN to the current limit setting of EN1/EN2.

10.3 Half-Wave Adapters

Some low-cost adapters implement a half rectifier topology, which causes the adapter output voltage to fall below the battery voltage during part of the cycle. To enable operation with low-cost adapters under those conditions, the bq2423xH family keeps the charger on for at least 20 ms (typical) after the input power puts the part in sleep mode. This feature enables use of external low-cost adapters using 50-Hz networks.