SLUSCB6B May   2015  – June 2017

UNLESS OTHERWISE NOTED, this document contains 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  Battery Preconditioning
      2. 7.3.2  Battery Fast-Charge Constant Current
      3. 7.3.3  Charge-Current Monitor
      4. 7.3.4  Battery Fast-Charge Voltage Regulation
      5. 7.3.5  Charge Termination Detection and Recharge
      6. 7.3.6  Charge Status Outputs
      7. 7.3.7  PG Output (bq24080-Q1)
      8. 7.3.8  Charge-Enabled (CE) Input (bq24080-Q1)
      9. 7.3.9  Timer Enabled (TE) Input (bq24081-Q1)
      10. 7.3.10 Temperature Qualification (bq24081-Q1)
      11. 7.3.11 Timer Fault and Recovery
        1. 7.3.11.1 Condition Number 1
        2. 7.3.11.2 Condition Number 2
    4. 7.4 Device Functional Modes
      1. 7.4.1 Sleep Mode
  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
        2. 8.2.2.2 Battery Temperature Sense (bq24081-Q1):
        3. 8.2.2.3 STAT Pins (All Devices) and PG Pin (bq24080-Q1):
        4. 8.2.2.4 Selecting Input and Output Capacitors
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  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
    2. 11.2 Documentation Support
    3. 11.3 Related Links
    4. 11.4 Receiving Notification of Documentation Updates
    5. 11.5 Community Resources
    6. 11.6 Trademarks
    7. 11.7 Electrostatic Discharge Caution
    8. 11.8 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

1 Features

  • Integrated Power FET and Current Sensor for
    Up to 1-A Charge Applications From AC Adapter
  • Precharge Conditioning With Safety Timer
  • Charge and Power-Good Status Output
  • Automatic Sleep Mode for Low Power Consumption
  • Integrated Charge-Current Monitor
  • Fixed 7-Hour Fast Charge Safety Timer
  • Ideal for Low-Dropout Charger Designs for
    Single-Cell Li-Ion or Li-Pol Packs in
    Space-Limited Portable Applications
  • Small 3-mm × 3-mm SON Package

2 Applications

  • Linear Chargers for Automotive
  • E-Call/ Back Up Call battery
  • Automotive Infotainment
  • Key FOB in Automotive

3 Description

The bq24080-Q1 and bq24081-Q1 are highly integrated and flexible Li-Ion linear charge devices targeted at space-limited charger applications. They offer an integrated power FET and current sensor, high-accuracy current and voltage regulation, charge status, and charge termination, in a single monolithic device. An external resistor sets the magnitude of the charge current.

The device charges the battery in three phases: conditioning, constant current, and constant voltage. Charge is terminated based on minimum current. An internal charge timer provides a backup safety for charge termination. The device automatically restarts the charge if the battery voltage falls below an internal threshold. The device automatically enters sleep mode when the ac adapter is removed.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
bq24080-Q1(2) VSON (10) 3.00 mm x 3.00 mm
bq24081-Q1
  1. For all available packages, see the orderable addendum at the end of the datasheet.
  2. Product Preview

Simplified Schematic

bq24080-Q1 bq24081-Q1 fp_circuit_sluscb6.gif