SLUSBV8C August 2014  – November 2014

UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA. 

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Device Comparison Table
  6. Pin Configuration and Functions
  7. Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2Handling Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6Typical Characteristics
  8. Detailed Description
    1. 8.1Overview
    2. 8.2Functional Block Diagram
    3. 8.3Feature Description
      1. 8.3.1 Overvoltage-Protection (OVP) - Continuously Monitored
      2. 8.3.2  CHG Pin Indication (bq25101, bq25101H)
      3. 8.3.3  CHG Pin LED Pull-up Source (bq25101, bq25101H)
      4. 8.3.4 IN-DPM (VIN-DPM or IN-DPM)
      5. 8.3.5 OUT
      6. 8.3.6 ISET
      7. 8.3.7 PRE_TERM - Pre-Charge and Termination Programmable Threshold
      8. 8.3.8 TS
      9. 8.3.9 Timers
      10. 8.3.10Termination
    4. 8.4Device Functional Modes
      1. 8.4.1Power-Down or Undervoltage Lockout (UVLO)
      2. 8.4.2Power-up
      3. 8.4.3Sleep Mode
      4. 8.4.4New Charge Cycle
      5. 8.4.5Termination and Timer Disable Mode (TTDM) - TS Pin High
      6. 8.4.6Battery Detect Routine
      7. 8.4.7Refresh Threshold
      8. 8.4.8Starting a Charge on a Full Battery
  9. Application and Implementation
    1. 9.1Application Information
    2. 9.2Typical Application - Charger Application Design Example
      1. 9.2.1Design Requirements
      2. 9.2.2Detailed Design Procedures
        1. 9.2.2.1Calculations
          1. 9.2.2.1.1Program the Fast Charge Current, ISET:
          2. 9.2.2.1.2Program the Termination Current Threshold, ITERM:
          3. 9.2.2.1.3TS Function
          4. 9.2.2.1.4Selecting IN and OUT Pin Capacitors
      3. 9.2.3bq25100 Application Performance Plots
  10. 10Power Supply Recommendations
    1. 10.1Leakage Current Effects on Battery Capacity
  11. 11Layout
    1. 11.1Layout Guidelines
    2. 11.2Layout Example
    3. 11.3Thermal Package
  12. 12Device and Documentation Support
    1. 12.1Device Support
      1. 12.1.1Third-Party Products Disclaimer
    2. 12.2Related Links
    3. 12.3Trademarks
    4. 12.4Electrostatic Discharge Caution
    5. 12.5Glossary
  13. 13Mechanical, Packaging, and Orderable Information

1 Features

  • Charging
    • 1% Charge Voltage Accuracy
    • 10% Charge Current Accuracy
    • Supports Applications for Very Low Charge Currents - 10 mA to 250 mA
    • Supports minimum 1-mA Charge Termination Current
    • Ultra Low Battery Output Leakage Current - Maximum 75 nA
    • Adjustable Termination and Precharge Threshold
    • High voltage Chemistry Support: 4.35 V with bq25100H/01H, 4.30 V with bq25100A
  • Protection
    • 30-V Input Rating; with 6.5-V Input Overvoltage 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 – 1/2 Fast-Charge-Current at Cold, 4.06 V (bq25100/01) or 4.2 V (bq25100H/01H) at Hot
    • Fixed 10 Hour Safety Timer
  • System
    • Automatic Termination and Timer Disable Mode (TTDM) for Absent Battery Pack
    • Available in Small 1.60 mm × 0.90 mm DSBGA Package

2 Applications

  • Fitness Accessories
  • Smart Watches
  • Bluetooth® Headsets
  • Low-Power Handheld Devices

3 Description

The bq2510x series of devices are highly integrated Li-Ion and Li-Pol linear chargers targeted at space-limited portable applications. The high input voltage range with input overvoltage protection supports low-cost unregulated adapters.

The bq2510x 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.

The charger power stage and charge current sense functions are fully integrated. The charger function has high accuracy current and voltage regulation loops and charge termination. The pre-charge current and termination current threshold are programmed via an external resistor on the bq2510x. The fast charge current value is also programmable via an external resistor.

Device Information(1)

PART NUMBERPACKAGEBODY SIZE (NOM)
bq25100DSBGA (6)1.60 mm × 0.90 mm
bq25101DSBGA (6)1.60 mm × 0.90 mm
bq25100ADSBGA (6)1.60 mm × 0.90 mm
bq25100HDSBGA (6)1.60 mm × 0.90 mm
bq25101HDSBGA (6)1.60 mm × 0.90 mm
bq25100L(2)DSBGA (6)1.60 mm × 0.90 mm
  1. For all available packages, see the orderable addendum at the end of the datasheet.
  2. Product preview. Contact the local TI representative for device details.
fp_App_Diag_bq25100_lusbv8.gif

4 Revision History

Changes from B Revision (October 2014) to C Revision

  • Changed data sheet title Go
  • Deleted product preview note from bq25101H in Device Information TableGo
  • Deleted product preview note from bq25101H in Device Comparison Table Go

Changes from A Revision (September 2014) to B Revision

  • Deleted product preview note from bq25101 and bq25100H in Device Information TableGo
  • Deleted product preview note from bq25101 and bq25100H in Device Comparison Table Go

Changes from * Revision (August 2014) to A Revision

  • Release to ProductionGo