SLUSAB0D October   2010  – April 2016 BQ24153A , BQ24156A , BQ24158 , BQ24159

UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Description (Continued)
  6. 6 Device Comparisons
  7. 7 Pin Configuration and Functions
  8. 8 Specifications
    1. 8.1 Absolute Maximum Ratings
    2. 8.2 ESD Ratings
    3. 8.3 Recommended Operating Conditions
    4. 8.4 Thermal Information
    5. 8.5 Electrical Characteristics
    6. 8.6 Timing Requirements
    7. 8.7 Typical Characteristics
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Input Voltage Protection
        1. 9.3.1.1 Input Overvoltage Protection
        2. 9.3.1.2 Bad Adaptor Detection/Rejection
        3. 9.3.1.3 Sleep Mode
        4. 9.3.1.4 Input Voltage Based DPM (Special Charger Voltage Threshold)
      2. 9.3.2 Battery Protection
        1. 9.3.2.1 Output Overvoltage Protection
        2. 9.3.2.2 Battery Short Protection
        3. 9.3.2.3 Battery Detection at Power Up in 15-minute Mode (bq24153A/6A only)
        4. 9.3.2.4 Battery Detection in Host Mode
      3. 9.3.3 15-Minute Safety Timer and 32-second Watchdog Timer in Charge Mode
      4. 9.3.4 USB Friendly Power Up
      5. 9.3.5 Input Current Limiting at Power Up
    4. 9.4 Device Functional Modes
      1. 9.4.1 Charge Mode Operation
        1. 9.4.1.1 Charge Profile
      2. 9.4.2 PWM Controller in Charge Mode
      3. 9.4.3 Battery Charging Process
      4. 9.4.4 Thermal Regulation and Protection
      5. 9.4.5 Charge Status Output, STAT Pin
      6. 9.4.6 Control Bits in Charge Mode
        1. 9.4.6.1 CE Bit (Charge Mode)
        2. 9.4.6.2 RESET Bit
        3. 9.4.6.3 OPA_Mode Bit
      7. 9.4.7 Control Pins in Charge Mode
        1. 9.4.7.1 CD Pin (Charge Disable)
        2. 9.4.7.2 SLRST Pin (Safety Limit Register 06H Reset, bq24156A/9 only)
      8. 9.4.8 BOOST Mode Operation (bq24153A/8 only)
        1. 9.4.8.1 PWM Controller in Boost Mode
        2. 9.4.8.2 Boost Start Up
        3. 9.4.8.3 PFM Mode at Light Load
        4. 9.4.8.4 Safety Timer in Boost Mode
        5. 9.4.8.5 Protection in Boost Mode
          1. 9.4.8.5.1 Output Overvoltage Protection
          2. 9.4.8.5.2 Output Overload Protection
          3. 9.4.8.5.3 Battery Overvoltage Protection
        6. 9.4.8.6 STAT Pin in Boost Mode
      9. 9.4.9 High Impedance (HI-Z) Mode
    5. 9.5 Programming
      1. 9.5.1 Serial Interface Description
        1. 9.5.1.1 F/S Mode Protocol
        2. 9.5.1.2 H/S Mode Protocol
        3. 9.5.1.3 I2C Update Sequence
        4. 9.5.1.4 Slave Address Byte
        5. 9.5.1.5 Register Address Byte
    6. 9.6 Register Maps
      1. 9.6.1 Status/Control Register [Memory Location: 00, Reset State: x1xx 0xxx]
      2. 9.6.2 Control Register [Memory Location: 01, Reset State: 0011 0000]
      3. 9.6.3 Control/Battery Voltage Register [Memory Location: 02, Reset State: 0000 1010]
      4. 9.6.4 Vender/Part/Revision Register [Memory Location: 03, Reset State: 0101 000x]
      5. 9.6.5 Battery Termination/Fast Charge Current Register [Memory Location: 04, Reset State: 0000 000]
      6. 9.6.6 Special Charger Voltage/Enable Pin Status Register [Memory location: 05, Reset state: 001X X100]
      7. 9.6.7 Safety Limit Register [Memory location: 06, Reset state: 01000000]
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
        1. 10.2.2.1 Systems Design Specifications
        2. 10.2.2.2 Charge Current Sensing Resistor Selection Guidelines
        3. 10.2.2.3 Output Inductor and Capacitance Selection Guidelines
      3. 10.2.3 Application Curves
    3. 10.3 System Example
  11. 11Power Supply Recommendations
    1. 11.1 System Load After Sensing Resistor
    2. 11.2 System Load Before Sensing Resistor
  12. 12Layout
    1. 12.1 Layout Guidelines
      1. 12.1.1 Current Path
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Third-Party Products Disclaimer
    2. 13.2 Related Links
    3. 13.3 Community Resources
    4. 13.4 Trademarks
    5. 13.5 Electrostatic Discharge Caution
    6. 13.6 Glossary
  14. 14Mechanical, Packaging, and Orderable Information
    1. 14.1 Package Summary
      1. 14.1.1 Chip Scale Packaging Dimensions

5 Description (Continued)

The IC charges the battery in three phases: conditioning, constant current and constant voltage. The input current is automatically limited to the value set by the host. Charge is terminated based on battery voltage and user-selectable minimum current level. A safety timer with reset control provides a safety backup for I2C interface. During normal operation, The IC automatically restarts the charge cycle if the battery voltage falls below an internal threshold and automatically enters sleep mode or high impedance mode when the input supply is removed. The charge status can be reported to the host using the I2C interface. During the charging process, the IC monitors its junction temperature (TJ) and reduces the charge current once TJ increases to about 125°C. To support USB OTG device, bq24153A/8 can provide VBUS (5.05 V) by boosting the battery voltage. The IC is available in 20-pin WCSP package.