SLUS968G January 2010  – August 2015


  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Description (continued)
  6. Device Options
  7. Pin Configuration and Functions
  8. Specifications
    1. 8.1Absolute Maximum Ratings
    2. 8.2ESD Ratings
    3. 8.3Recommended Operating Conditions
    4. 8.4Thermal Information
    5. 8.5Dissipation Ratings
    6. 8.6Electrical Characteristics
    7. 8.7Typical Characteristics
      1. 8.7.1Power Up, Power Down, OVP, Disable and Enable Waveforms
      2. 8.7.2Protection Circuits Waveforms
  9. Detailed Description
    1. 9.1Overview
    2. 9.2Functional Block Diagram
    3. 9.3Feature Description
      1. 9.3.1 Power-Down or Undervoltage Lockout (UVLO)
      2. 9.3.2 UVLO
      3. 9.3.3 Power-Up
      4. 9.3.4 Sleep Mode
      5. 9.3.5 New Charge Cycle
      6. 9.3.6 Overvoltage-Protection (OVP) - Continuously Monitored
      7. 9.3.7 Power Good Indication (PG)
      8. 9.3.8  CHG Pin Indication
      9. 9.3.9  CHG and PG LED Pull-Up Source
      10. 9.3.10IN-DPM (VIN-DPM or IN-DPM)
      11. 9.3.11OUT
      12. 9.3.12ISET
      13. 9.3.13PRE_TERM - Pre-Charge and Termination Programmable Threshold
      14. 9.3.14ISET2
      15. 9.3.15TS
    4. 9.4Device Functional Modes
      1. 9.4.1Termination and Timer Disable Mode (TTDM) -TS Pin High
      2. 9.4.2Timers
      3. 9.4.3Termination
      4. 9.4.4Battery Detect Routine
      5. 9.4.5Refresh Threshold
      6. 9.4.6Starting a Charge on a Full Battery
  10. 10Application and Implementation
    1. 10.1Application Information
    2. 10.2Typical Application
      1. 10.2.1Design Requirements
      2. 10.2.2Detailed Design Procedure
          1. the Fast Charge Current, ISET:
          2. the Termination Current Threshold, ITERM:
          3. Function
          4. CHG and PG
        2. IN and OUT Pin Capacitors
      3. 10.2.3Application Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1Layout Guidelines
    2. 12.2Layout Example
    3. 12.3Thermal Considerations
      1. 12.3.1Leakage Current Effects on Battery Capacity
  13. 13Device and Documentation Support
    1. 13.1Device Support
      1. 13.1.1Third-Party Products Disclaimer
    2. 13.2Related Links
    3. 13.3Trademarks
    4. 13.4Electrostatic Discharge Caution
    5. 13.5Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Orderable Information

1 Features

  • Charging
    • 1% Charge Voltage Accuracy
    • 10% Charge Current Accuracy
    • Pin Selectable USB 100-mA and 500-mA Maximum Input Current Limit
    • Programmable Termination and Precharge Threshold
  • Protection
    • 6.6 V Over-Voltage Protection
    • Input Voltage Dynamic Power Management
    • 125°C Thermal Regulation; 150°C Thermal Shutdown Protection
    • OUT Short-Circuit Protection and ISET Short Detection
    • Operation Over JEITA Range via Battery NTC – ½ Fast-Charge-Current at Cold, 4.06V at Hot, bq24092/3
    • Fixed 10-Hour Safety Timer
  • System
    • Automatic Termination and Timer Disable Mode (TTDM) for Absent Battery Pack With Thermistor
    • Status Indication – Charging/Done
    • Available in Small 10-Pin MSOP Package

2 Applications

  • Smart Phones
  • PDAs
  • MP3 Players
  • Low-Power Handheld Devices

3 Description

The bq2409x series of devices are highly integrated Li-ion and Li-Pol linear chargers devices targeted at space-limited portable applications. The devices operate from either a USB port or AC adapter. The high input voltage range with input overvoltage protection supports low-cost unregulated adapters.

The bq2409x has a single power output that charges the battery. A system load can be placed in parallel with the battery as long as the average system load does not keep the battery from charging fully during the 10-hour safety timer.

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 an internal temperature threshold is exceeded.

Device Information(1)

bq2409xHVSSOP (10)3.00 mm x 3.00 mm
  1. For all available packages, see the orderable addendum at the end of the datasheet.
bq24091 bq24092 bq24093 bq24095 bq24090 app_cir_lus968.gif

4 Revision History

Changes from F Revision (December 2014) to G Revision

  • Changed bq24095 VO(REG) value From: 4.20 V To: 4.35 V in the Device Options table Go

Changes from E Revision (September 2013) to F Revision

  • Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information sectionGo

Changes from D Revision (December 2012) to E Revision

  • Deleted the MARKING column from the ORDERING INFORMATION table, and added table note 1.Go

Changes from C Revision (May 2012) to D Revision

  • Added bq24095 to the ORDERING INFORMATION tableGo
  • Changed bq24090/2 to bq24090/2/5 for TS pin description in Pin Functions table.Go
  • Changed the KISET entry in the Elect Characteristics tableGo
  • Deleted " Line Regulation" typical characteristics graph Go
  • Changed "Current Regulation Over Temperature" graph to "Load Regulation - bq24095" graphGo

Changes from B Revision (June 2010) to C Revision

  • Changed all instances of Li-ion To: Li-ion and Li-PolGo

Changes from A Revision (February 2010) to B Revision

  • Changed the device number on the front page circuit From: bq24090 To: bq2409x Go
  • Changed the ORDERING INFORMATION table Marking column From: Product Preview To: bq24092 and bq24093Go

Changes from * Revision (January 2010) to A Revision

  • Changed VDO(IN-OUT), MAX value From: 500 mV To: 520 mV in the Elect Characteristics table Go
  • Changed IPRE-TERM MAX value From: 79 µA to 81µA in the Elect Characteristics tableGo
  • Changed VCLAMP(TS) MIN value From: 1900 mV to 1800 mV in the Elect Characteristics tableGo