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  • bq241xx Synchronous Switched-Mode, Li-Ion and Li-Polymer Charge-Management IC With Integrated Power FETs (bqSWITCHER™)

    • SLUS606P June   2004  – November 2015

      PRODUCTION DATA.  

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  • bq241xx Synchronous Switched-Mode, Li-Ion and Li-Polymer Charge-Management IC With Integrated Power FETs (bqSWITCHER™)
  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Options
  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 Dissipation Ratings
    7. 7.7 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  PWM Controller
      2. 8.3.2  Temperature Qualification
      3. 8.3.3  Battery Preconditioning (Precharge)
      4. 8.3.4  Battery Charge Current
      5. 8.3.5  Battery Voltage Regulation
      6. 8.3.6  Charge Termination and Recharge
      7. 8.3.7  Sleep Mode
      8. 8.3.8  Charge Status Outputs
      9. 8.3.9  PG Output
      10. 8.3.10 CE Input (Charge Enable)
      11. 8.3.11 Timer Fault Recovery
      12. 8.3.12 Output Overvoltage Protection (Applies to All Versions)
      13. 8.3.13 Functional Description For System-Controlled Version (bq2411x)
      14. 8.3.14 Precharge and Fast-Charge Control
      15. 8.3.15 Charge Termination and Safety Timers
      16. 8.3.16 Battery Detection
        1. 8.3.16.1 Battery Detection Example
      17. 8.3.17 Current Sense Amplifier
    4. 8.4 Device Functional Modes
  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 Inductor, Capacitor, and Sense Resistor Selection Guidelines
      3. 9.2.3 Application Curve
    3. 9.3 System Examples
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
    3. 11.3 Thermal Considerations
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Related Links
    4. 12.4 Community Resources
    5. 12.5 Trademarks
    6. 12.6 Electrostatic Discharge Caution
    7. 12.7 Glossary
  13. 13Mechanical, Packaging, and Orderable Information
  14. IMPORTANT NOTICE

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
  • RHL|20
    • MPQF155K
サーマルパッド・メカニカル・データ
  • RHL|20
    • QFND077N
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DATA SHEET

bq241xx Synchronous Switched-Mode, Li-Ion and Li-Polymer Charge-Management IC With Integrated Power FETs (bqSWITCHER™)

1 Features

  • Ideal For Highly Efficient Charger Designs For Single-, Two-, or Three-Cell Li-Ion and Li-Polymer Battery Packs
  • bq24105 Also for LiFePO4 Battery (see Using bq24105 to Charge the LiFePO4 Battery)
  • Integrated Synchronous Fixed-Frequency PWM Controller Operating at 1.1 MHz With 0% to 100% Duty Cycle
  • Integrated Power FETs for Up To 2-A Charge Rate
  • High-Accuracy Voltage and Current Regulation
  • Available in Both Stand-Alone (Built-In Charge Management and Control) and System-Controlled (Under System Command) Versions
  • Status Outputs for LED or Host Processor Interface Indicates Charge-In-Progress, Charge Completion, Fault, and AC-Adapter Present Conditions
  • 20-V Maximum Voltage Rating on IN and OUT Pins
  • High-Side Battery Current Sensing
  • Battery Temperature Monitoring
  • Automatic Sleep Mode for Low Power Consumption
  • System-Controlled Version Can Be Used in NiMH and NiCd Applications
  • Reverse Leakage Protection Prevents Battery Drainage
  • Thermal Shutdown and Protection
  • Built-In Battery Detection
  • Available in 20-Pin, 3.50 mm × 4.50 mm VQFN Package

2 Applications

  • Handheld Products
  • Portable Media Players
  • Industrial and Medical Equipment
  • Portable Equipment

3 Description

The bqSWITCHER™ series are highly integrated Li-ion and Li-polymer switch-mode charge management devices targeted at a wide range of portable applications. The bqSWITCHER™ series offers integrated synchronous PWM controller and power FETs, high-accuracy current and voltage regulation, charge preconditioning, charge status, and charge termination, in a small, thermally enhanced VQFN package. The system-controlled version provides additional inputs for full charge management under system control.

The bqSWITCHER™ charges the battery in three phases: conditioning, constant current, and constant voltage. Charge is terminated based on user- selectable minimum current level. A programmable charge timer provides a safety backup for charge termination. The bqSWITCHER™ automatically restarts the charge cycle if the battery voltage falls below an internal threshold. The bqSWITCHER™ automatically enters sleep mode when VCC supply is removed.

Device Information (1)

PART NUMBER PACKAGE BODY SIZE (NOM)
bq241xx VQFN (20) 3.50 mm × 4.50 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Typical 1-Cell Application

bq24100 bq24103 bq24103A bq24104 bq24105 bq24108 bq24109 bq24113 bq24113A bq24115 tc_app1_lus606.gif

4 Revision History

Changes from O Revision (March 2010) to P 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 M Revision (August 2008) to N Revision

  • Added part number bq24104.Go
  • Added part number bq24104 to the Ordering InformationGo
  • Deleted Product Preview from bq24104RHLRGo
  • Deleted Product Preview from bq24104RHLTGo
  • Added bq24104 to the Terminal Functions table.Go
  • Added part number bq24104 to the Deglitch timeGo
  • Added bq24104 to Table 2.Go
  • Added part number bq24104 to Figure 16 Go

Changes from L Revision (December 2007) to M Revision

  • Changed specifications and symbols for (cold, hot, and cutoff) temperature thresholdsGo
  • Changed equation definitionsGo
  • Changed equation definitionsGo

Changes from K Revision (November 2007) to L Revision

  • Changed Added figure almost identical to Figure 3. Changed RISET2 to 20 kohms.Go
  • Added Changed resistor bridge values 301 to 143, 100 to 200 KohmsGo

Changes from J Revision (October 2007) to K Revision

  • Changed From: CIU To: CDYGo
  • Added bq24109 to VOREG Go
  • Added part number bq24109 to VLOWV Go
  • Changed Deglitch time for temperature fault, TS, bq24109 typical value From: 1000 To: 500Go
  • Changed From: Single-cell or two-cell To: one-, two-, or three-cell applications. Deleted text.Go

Changes from I Revision (August 2007) to J Revision

  • Added part number bq24109 Go
  • Added part number bq24109 to the Ordering InformationGo
  • Added bq24109 to the Terminal Functions table.Go
  • Added part number bq24109 to the Deglitch timeGo
  • Added bq24109 to Table 2.Go

Changes from H Revision (July 2007) to I Revision

  • Added part number bq24103A Go
  • Changed device size From: 5,5 mm x 3.5 mm To: 4,5 mm x 3.5 mmGo
  • Added part number bq24103A to the Ordering InformationGo
  • Added bq24103A to the Terminal Functions table.Go
  • Added part numbers bq24103Ana d bq24113A to VOREG Go
  • Added part number bq24103A to VLOWV Go
  • Added part number bq24103A to Figure 16 Go

Changes from G Revision (June 2007) to H Revision

  • Changed Figure 1 Go
  • Changed Figure 2 Go
  • Added D1 to diode MMBZ18VALT1 in Figure 13.Go
  • Added D1 to diode MMBZ18VALT1 in Figure 16 Go
  • Added D1 to diode MMBZ18VALT1 in Figure 17 Go
  • Added D1 to diode MMBZ18VALT1 and Note A to Figure 18.Go

Changes from F Revision (January 2007) to G Revision

  • Added bq24113A to the data sheet and the Ordering Information.Go
  • Added bq24113A to the Terminal Functions table.Go
  • Changed bq24113A added to Figure 18 Go

 
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