SLUSCJ4B June   2017  – March 2022 BQ25600 , BQ25600D

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Description (continued)
  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 Timing Requirements
    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 Power-On-Reset (POR)
      2. 8.3.2 Device Power Up from Battery without Input Source
      3. 8.3.3 Power Up from Input Source
        1. 8.3.3.1 Power Up REGN Regulation
        2. 8.3.3.2 Poor Source Qualification
        3. 8.3.3.3 Input Source Type Detection
          1. 8.3.3.3.1 D+/D– Detection Sets Input Current Limit in BQ25600D
          2. 8.3.3.3.2 PSEL Pins Sets Input Current Limit in BQ25600
        4. 8.3.3.4 Input Voltage Limit Threshold Setting (VINDPM Threshold)
        5. 8.3.3.5 Converter Power Up
      4. 8.3.4 Boost Mode Operation From Battery
      5. 8.3.5 Host Mode and Standalone Power Management
        1. 8.3.5.1 Host Mode and Default Mode in BQ25600 and BQ25600D
      6. 8.3.6 Power Path Management
      7. 8.3.7 Battery Charging Management
        1. 8.3.7.1 Autonomous Charging Cycle
        2. 8.3.7.2 Battery Charging Profile
        3. 8.3.7.3 Charging Termination
        4. 8.3.7.4 Thermistor Qualification
        5. 8.3.7.5 JEITA Guideline Compliance During Charging Mode
        6. 8.3.7.6 Boost Mode Thermistor Monitor During Battery Discharge Mode
        7. 8.3.7.7 Charging Safety Timer
      8. 8.3.8 Protections
        1. 8.3.8.1 Voltage and Current Monitoring in Converter Operation
          1. 8.3.8.1.1 Voltage and Current Monitoring in Buck Mode
            1. 8.3.8.1.1.1 Input Overvoltage (ACOV)
            2. 8.3.8.1.1.2 System Overvoltage Protection (SYSOVP)
        2. 8.3.8.2 Voltage and Current Monitoring in Boost Mode
          1. 8.3.8.2.1 VBUS Soft Start
          2. 8.3.8.2.2 VBUS Output Protection
          3. 8.3.8.2.3 Boost Mode Overvoltage Protection
        3. 8.3.8.3 Thermal Regulation and Thermal Shutdown
          1. 8.3.8.3.1 Thermal Protection in Buck Mode
          2. 8.3.8.3.2 Thermal Protection in Boost Mode
        4. 8.3.8.4 Battery Protection
          1. 8.3.8.4.1 Battery Overvoltage Protection (BATOVP)
          2. 8.3.8.4.2 Battery Overdischarge Protection
          3. 8.3.8.4.3 System Overcurrent Protection
    4. 8.4 Device Functional Modes
      1. 8.4.1 Narrow VDC Architecture
      2. 8.4.2 Dynamic Power Management
      3. 8.4.3 Supplement Mode
      4. 8.4.4 Shipping Mode and QON Pin
        1. 8.4.4.1 BATFET Disable Mode (Shipping Mode)
        2. 8.4.4.2 BATFET Enable (Exit Shipping Mode)
        3. 8.4.4.3 BATFET Full System Reset
        4. 8.4.4.4 QON Pin Operations
      5. 8.4.5 Status Outputs ( PG, STAT, INT )
        1. 8.4.5.1 Power Good Indicator ( PG Pin and PG_STAT Bit)
        2. 8.4.5.2 Charging Status Indicator (STAT)
        3. 8.4.5.3 Interrupt to Host ( INT)
    5. 8.5 Programming
      1. 8.5.1 Serial Interface
        1. 8.5.1.1 Data Validity
        2. 8.5.1.2 START and STOP Conditions
        3. 8.5.1.3 Byte Format
        4. 8.5.1.4 Acknowledge (ACK) and Not Acknowledge (NACK)
        5. 8.5.1.5 Slave Address and Data Direction Bit
        6. 8.5.1.6 Single Read and Write
        7. 8.5.1.7 Multi-Read and Multi-Write
    6. 8.6 Register Maps
      1. 8.6.1  REG00
      2. 8.6.2  REG01
      3. 8.6.3  REG02
      4. 8.6.4  REG03
      5. 8.6.5  REG04
      6. 8.6.6  REG05
      7. 8.6.7  REG06
      8. 8.6.8  REG07
      9. 8.6.9  REG08
      10. 8.6.10 REG09
      11. 8.6.11 REG0A
      12. 8.6.12 REG0B
  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 Selection
        2. 9.2.2.2 Input Capacitor
        3. 9.2.2.3 Output Capacitor
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Support Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

8.3.7.3 Charging Termination

The device terminates a charge cycle when the battery voltage is above recharge threshold, and the current is below termination current. After the charging cycle is completed, the BATFET turns off. The converter keeps running to power the system, and BATFET can turn on again to engage Supplement Mode.

When termination occurs, the status register CHRG_STAT is set to 11, and an INT pulse is asserted to the host. Termination is temporarily disabled when the charger device is in input current, voltage, or thermal regulation . Termination can be disabled by writing 0 to EN_TERM bit prior to charge termination.

At low termination currents, due to the comparator offset, the actual termination current may be 10 mA-20 mA higher than the termination target. in order to compensate for comparator offset, a programmable top-off timer can be applied after termination is detected. The termination timer will follow safety timer constraints, such that if safety timer is suspended, so will the termination timer. Similarly, if safety timer is doubled, so will the termination timer. TOPOFF_ACTIVE bit reports whether the top off timer is active or not. The host can read CHRG_STAT and TOPOFF_ACTIVE to find out the termination status.

Top off timer gets reset at one of the following conditions:

  1. Charge disable to enable
  2. Termination status low to high
  3. REG_RST register bit is set

The top-off timer settings are read in once termination is detected by the charger. Programming a top-off timer value after termination will have no effect unless a recharge cycle is initiated. An INT is asserted to the host when entering top-off timer segment as well as when top-off timer expires.