SLUSCG4 May   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 Undervoltage Lockout
      2. 7.3.2 Power On
      3. 7.3.3 Power-Path Management
        1. 7.3.3.1 Input Source Connected - Adapter or USB
          1. 7.3.3.1.1 Input Voltage Dynamic Power Management, (VIN_DPM)
          2. 7.3.3.1.2 Dynamic Power Path Management (DPPM)
          3. 7.3.3.1.3 Battery Supplement Mode
        2. 7.3.3.2 Input Source not Connected
      4. 7.3.4 Thermal Regulation and Thermal Shutdown
      5. 7.3.5 Battery Pack Temperature Monitoring
        1. 7.3.5.1 Modifying and Extending the Allowable Temperature Range for Charging
    4. 7.4 Device Functional Modes
      1. 7.4.1 Battery Charging
        1. 7.4.1.1 Charge Current Translator
        2. 7.4.1.2 Battery Detection and Recharge
        3. 7.4.1.3 Adjustable Termination Threshold (ITERM Input)
        4. 7.4.1.4 Dynamic Charge Timers (TMR Input)
        5. 7.4.1.5 Status Indicators (PGOOD, CHG)
          1. 7.4.1.5.1 Timer Fault
      2. 7.4.2 Explanation of Deglitch Times and Comparator Hysteresis
  8. 8 Application 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 Calculations
          1. 8.2.2.1.1 Program The Fast-Charge Current (ISET):
          2. 8.2.2.1.2 Program The Input Current Limit (ILIM)
          3. 8.2.2.1.3 Program The Termination Current Threshold (ITERM, bq24232HA)
          4. 8.2.2.1.4 Program 7.5-hour Fast-Charge Safety Timer (TMR)
        2. 8.2.2.2 TS Function
        3. 8.2.2.3 CHG and PGOOD
        4. 8.2.2.4 Selecting IN, OUT, and BAT Pin Capacitors
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
    1. 9.1 Requirements for OUT Output
    2. 9.2 USB Sources and Standard AC Adapters
    3. 9.3 Half-Wave Adapters
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 Thermal Considerations
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    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)
  • RGT|16
Thermal pad, mechanical data (Package|Pins)
Orderable Information

1 Features

  • Fully Compliant USB Charger
    • Selectable 100-mA and 500-mA Maximum Input Current
    • 100-mA Maximum Current Limit Ensures Compliance to USB-IF Standard
    • Input-based Dynamic Power Management (VIN – DPM) for Protection Against Poor USB Sources
  • 28-V Input Rating With Overvoltage Protection
  • Integrated Dynamic Power-Path Management (DPPM) Function Simultaneously and Independently Powers the System and Charges the Battery
  • Supports up to 500-mA Charge Current With Current Monitoring Output (ISET)
  • Programmable Input Current Limit up to 500 mA for Wall Adapters
  • Programmable Termination Current
  • Programmable Precharge and Fast-Charge Safety Timers
  • Reverse Current, Short-Circuit, and Thermal Protection
  • NTC Thermistor Input
  • Proprietary Start-Up Sequence Limits Inrush Current
  • Status Indication – Charging/Done, Power Good
  • Small 3 mm × 3 mm 16-Lead QFN Package

2 Applications

  • Bluetooth™ Devices
  • Low-Power Handheld Devices

3 Description

The bq24232HA device is a highly integrated Li-ion linear charger and system power-path management device targeted at space-limited portable applications. The device operates from either a USB port or ac adapter and supports charge currents between 25 mA and 500 mA. The high-input-voltage range with input overvoltage protection supports low-cost, unregulated adapters. The USB input current limit accuracy and start-up sequence allow the bq24232HA to meet USB-IF inrush current specification. Additionally, the input dynamic power management (VIN – DPM) prevents the charger from crashing poorly designed or incorrectly configured USB sources.

The bq24232HA features dynamic power-path management (DPPM) that powers the system while simultaneously and independently charging the battery. The DPPM circuit reduces the charge current when the input current limit causes the system output to fall to the DPPM threshold, thus supplying the system load at all times while monitoring the charge current separately. This feature reduces the number of charge and discharge cycles on the battery, allows for proper charge termination, and enables the system to run with a defective or absent battery pack. Additionally, this enables instant system turn-on even with a totally discharged battery. The power-path management architecture also permits the battery to supplement the system current requirements when the adapter cannot deliver the peak system currents, enabling the use of a smaller adapter.

The battery is charged in three phases: conditioning, constant current, and constant voltage. In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if the internal temperature threshold is exceeded.

The charger power stage and charge current sense functions are fully integrated. The charger function has high-accuracy current and voltage regulation loops, charge status display, and charge termination. The input current limit and charge current are programmable using external resistors.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
bq24232HA VQFN (16) 3.00 mm × 3.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Typical Application Circuit

bq24232HA app_cir2_sluscg4.gif

4 Revision History

DATE REVISION NOTES
May 2016 * Initial release.