SLUSAF7C December 2010  – April 2015

PRODUCTION DATA. 

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Description (continued)
  6. Device Comparison Table
  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. 8.5Electrical Characteristics
    6. 8.6Typical Characteristics
  9. Detailed Description
    1. 9.1Overview
    2. 9.2Functional Block Diagram
    3. 9.3Feature Description
      1. 9.3.1 Battery Voltage Regulation
      2. 9.3.2 Battery Current Regulation
      3. 9.3.3 Battery Precharge Current Regulation
      4. 9.3.4 Input Current Regulation
      5. 9.3.5 Charge Termination, Recharge, And Safety Timers
      6. 9.3.6 Power Up
      7. 9.3.7 Input Undervoltage Lockout (UVLO)
      8. 9.3.8 Input Overvoltage/Undervoltage Protection
      9. 9.3.9 Enable and Disable Charging
      10. 9.3.10System Power Selector
      11. 9.3.11Converter Operation
      12. 9.3.12Automatic Internal Soft-Start Charger Current
      13. 9.3.13Charge Overcurrent Protection
      14. 9.3.14Charge Undercurrent Protection
      15. 9.3.15Battery Detection
        1. 9.3.15.1Example
      16. 9.3.16Battery Short Protection
      17. 9.3.17Battery Overvoltage Protection
      18. 9.3.18Temperature Qualification
      19. 9.3.19MOSFET Short Circuit and Inductor Short Circuit Protection
      20. 9.3.20Thermal Regulation and Shutdown Protection
      21. 9.3.21Timer Fault Recovery
      22. 9.3.22Charge Status Outputs
    4. 9.4Device Functional Modes
  10. 10Application and Implementation
    1. 10.1Application Information
    2. 10.2Typical Application
      1. 10.2.1Design Requirements
      2. 10.2.2Detailed Design Procedure
        1. 10.2.2.1Inductor Selection
        2. 10.2.2.2Input Capacitor
        3. 10.2.2.3Output Capacitor
        4. 10.2.2.4Input Filter Design
        5. 10.2.2.5Input ACFET and RBFET Selection
        6. 10.2.2.6Inductor, Capacitor, and Sense Resistor Selection Guidelines
      3. 10.2.3Application Curve
    3. 10.3System Examples
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1Layout Guidelines
    2. 12.2Layout Examples
  13. 13Device and Documentation Support
    1. 13.1Trademarks
    2. 13.2Electrostatic Discharge Caution
    3. 13.3Glossary
  14. 14Mechanical, Packaging, and Orderable Information

1 Features

  • 1.6-MHz Synchronous Switched-Mode Charger With 2.5-A Integrated N-MOSFETs
  • Up to 92% Efficiency
  • 30-V Input Rating With Adjustable Overvoltage Protection
    • 4.5-V to 17-V Input Operating Voltage
  • Battery Charge Voltage
    • 1-Cell, 2-Cell, or 3-Cell With 4.2 V/Cell
  • High Integration
    • Automatic Power Path Selector Between Adapter and Battery
    • Dynamic Power Management
    • Integrated 20-V Switching MOSFETs
    • Integrated Bootstrap Diode
    • Internal Digital Soft Start
  • Safety
    • Thermal Regulation Loop Throttles Back Current to Limit TJ = 120°C
    • Thermal Shutdown
    • Battery Thermistor Sense Hot/Cold Charge Suspend and Battery Detect
    • Adjustable Input Overvoltage Protection
    • Cycle-by-Cycle Current Limit
  • Accuracy
    • ±0.5% Charge Voltage Regulation
    • ±5% Charge Current Regulation
    • ±6% Input Current Regulation
  • <15-μA Battery Current With Adapter Removed
  • <1.5-mA Input Current With Adapter Present and Charge Disabled Package

2 Applications

  • Tablet PCs
  • Netbooks and Ultra-Mobile Computers
  • Portable Data Capture Terminals
  • Portable Printers
  • Medical Diagnostics Equipment
  • Battery Bay Chargers
  • Battery Backup Systems

3 Description

The bq24133 device is a highly integrated stand-alone Li-Ion and Li-Polymer switched-mode battery charger with two integrated N-channel power MOSFETs. The device offers a constant-frequency synchronous PWM controller with high accuracy regulation of input current, charge current, and voltage. The bq24133 closely monitors the battery pack temperature to allow charge only in a preset temperature window. The bq24133 charges one, two, or three cells (selected by CELL pin) at a fixed 4.2 V/cell.

Device Information(1)

PART NUMBERPACKAGEBODY SIZE (NOM)
bq24133VQFN (24)5.50 mm × 3.50 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Typical Application Schematic

bq24133 typ_app1_slusaf7.gif