SLUS940D September   2009  – May 2021 BQ24050 , BQ24052

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 (1)
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions (1)
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Timing Requirements
    7. 6.7 Switching Characteristics
    8. 6.8 Typical Characteristics
      1. 6.8.1 Power Up, Down, OVP, Disable and Enable Waveforms
      2. 6.8.2 Protection Circuits Waveforms
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Power Down, or Undervoltage Lockout (UVLO)
      2. 7.3.2  Power Up
      3. 7.3.3  D+, D– Detection
      4. 7.3.4  New Charge Cycle
      5. 7.3.5  Overvoltage Protection (OVP) – Continuously Monitored
      6. 7.3.6  CHG Pin Indication
      7. 7.3.7  CHG LED Pullup Source
      8. 7.3.8  Input DPM Mode (VIN-DPM or IN-DPM)
      9. 7.3.9  OUT
      10. 7.3.10 ISET
      11. 7.3.11 TS
      12. 7.3.12 Termination and Timer Disable Mode (TTDM) -TS Pin High
      13. 7.3.13 Timers
      14. 7.3.14 Termination
      15. 7.3.15 Battery Detect Routine
      16. 7.3.16 Refresh Threshold
      17. 7.3.17 Starting a Charge on a Full Battery
    4. 7.4 Device Functional Modes
      1. 7.4.1 Sleep Mode
    5. 7.5 Programming
      1. 7.5.1 PRE_TERM – Precharge and Termination Programmable Threshold
      2. 7.5.2 ISET2
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 BQ2405x Charger Application Design Example
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Program the Fast Charge Current, ISET
          2. 8.2.1.2.2 Program the Termination Current Threshold, ITERM
          3. 8.2.1.2.3 TS Function
          4. 8.2.1.2.4 CHG
          5. 8.2.1.2.5 Selecting IN and OUT Pin Capacitors
        3. 8.2.1.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 Thermal Considerations
      1. 10.3.1 Leakage Current Effects on Battery Capacity
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Receiving Notification of Documentation Updates
    4. 11.4 Support Resources
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 Glossary

Package Options

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

6.7 Switching Characteristics

over operating free-air temperature range (unless otherwise noted)
PARAMETERTEST CONDITIONSMINTYPMAXUNIT
INPUT
tDGL(OVP-SET)Input overvoltage blanking timeVIN: 5V → 12V113μs
tDGL(OVP-REC)Deglitch time exiting OVPTime measured from VIN: 12V → 5V30μs
ISET SHORT CIRCUIT TEST
tDGL_SHORTDeglitch time transition from ISET short to Iout disableClear fault by cycling IN or TS1ms
RECHARGE OR REFRESH
tDGL1(RCH)Deglitch time, recharge threshold detectedVIN = 5V, VTS = 0.5V, VOUT: 4.25V → 3.5V in 1μs; tDGL1(RCH) is time to ISET ramp29ms
tDGL2(RCH)Deglitch time, recharge threshold detected in OUT-Detect ModeVIN = 5V, VTS = 0.5V, VOUT = 3.5V inserted; tDGL2(RCH) is time to ISET ramp3.6ms
BATTERY DETECT ROUTINE(1)
tDGL(HI/LOW REG)Regulation time at VREG or VREG-BDVIN = 5V, VTS = 0.5V, Battery Absent25ms
BATTERY CHARGING TIMERS AND FAULT TIMERS
tPRECHGPrecharge safety timer valueRestarts when entering precharge; Always enabled when in precharge.170019402250s
tMAXCHCharge safety timer valueClears fault or resets at UVLO, TS (CE) disable, OUT Short, exiting LOWV and Refresh340003880045000s
BATTERY-PACK NTC MONITOR(2)
tDGL(TS_10C)Deglitch for TS thresholds: 10°CNormal to Cold Operation: VTS: 0.6V → 1V40ms
Cold to Normal Operation: VTS: 1.0V → 0.6V12ms
tDGL(TS)Deglitch for TS thresholds: 0/45/60C.Battery charging30ms
D+/D– DETECTION – BQ2405x
tDPDMDetectionTime from start of D+/D– detection to latched outputt = 0 at D– pulled-up > 0.5V or D+ pulled up externally, >0.8V65ms