SLUS968G January   2010  – August 2015

PRODUCTION DATA.  

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Description (continued)
  6. Device Options
  7. Pin Configuration and Functions
  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 Dissipation Ratings
    6. 8.6 Electrical Characteristics
    7. 8.7 Typical Characteristics
      1. 8.7.1 Power Up, Power Down, OVP, Disable and Enable Waveforms
      2. 8.7.2 Protection Circuits Waveforms
  9. Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature 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. 9.3.10 IN-DPM (VIN-DPM or IN-DPM)
      11. 9.3.11 OUT
      12. 9.3.12 ISET
      13. 9.3.13 PRE_TERM - Pre-Charge and Termination Programmable Threshold
      14. 9.3.14 ISET2
      15. 9.3.15 TS
    4. 9.4 Device Functional Modes
      1. 9.4.1 Termination and Timer Disable Mode (TTDM) -TS Pin High
      2. 9.4.2 Timers
      3. 9.4.3 Termination
      4. 9.4.4 Battery Detect Routine
      5. 9.4.5 Refresh Threshold
      6. 9.4.6 Starting a Charge on a Full Battery
  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 Calculations
          1. 10.2.2.1.1 Program the Fast Charge Current, ISET:
          2. 10.2.2.1.2 Program the Termination Current Threshold, ITERM:
          3. 10.2.2.1.3 TS Function
          4. 10.2.2.1.4 CHG and PG
        2. 10.2.2.2 Selecting IN and OUT Pin Capacitors
      3. 10.2.3 Application Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
    3. 12.3 Thermal Considerations
      1. 12.3.1 Leakage Current Effects on Battery Capacity
  13. 13Device and Documentation Support
    1. 13.1 Device Support
      1. 13.1.1 Third-Party Products Disclaimer
    2. 13.2 Related Links
    3. 13.3 Trademarks
    4. 13.4 Electrostatic Discharge Caution
    5. 13.5 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, 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)

PART NUMBER PACKAGE BODY SIZE (NOM)
bq2409x HVSSOP (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