SLUSBP6D september   2013  – april 2023 BQ24296 , BQ24297

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Description (continued)
  6. 6 Device Comparison Table
  7. 7 Pin Configuration and Functions
  8. 8 Specifications
    1. 8.1 Absolute Maximum Ratings #GUID-BA2DB09A-966C-4324-B633-1AB165FC219B/SLUSBC14058
    2. 8.2 ESD Ratings
    3. 8.3 Recommended Operating Conditions
    4. 8.4 Thermal Information
    5. 8.5 Electrical Characteristics
    6. 8.6 Timing Requirements
    7. 8.7 Typical Characteristics
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Device Power Up
        1. 9.3.1.1 Power-On-Reset (POR)
        2. 9.3.1.2 Power Up from Battery without DC Source
          1. 9.3.1.2.1 BATFET Turn Off
          2. 9.3.1.2.2 Shipping Mode
        3. 9.3.1.3 Power Up from DC Source
          1. 9.3.1.3.1 REGN LDO
          2. 9.3.1.3.2 Input Source Qualification
          3. 9.3.1.3.3 Input Current Limit Detection
          4. 9.3.1.3.4 D+/D– Detection Sets Input Current Limit (BQ24297)
          5. 9.3.1.3.5 PSEL/OTG Pins Set Input Current Limit
          6. 9.3.1.3.6 HIZ State with 100mA USB Host
          7. 9.3.1.3.7 Force Input Current Limit Detection
        4. 9.3.1.4 Converter Power-Up
        5. 9.3.1.5 Boost Mode Operation from Battery
      2. 9.3.2 Power Path Management
        1. 9.3.2.1 Narrow VDC Architecture
        2. 9.3.2.2 Dynamic Power Management
        3. 9.3.2.3 Supplement Mode
      3. 9.3.3 Battery Charging Management
        1. 9.3.3.1 Autonomous Charging Cycle
        2. 9.3.3.2 Battery Charging Profile
        3. 9.3.3.3 Thermistor Qualification
          1. 9.3.3.3.1 Cold/Hot Temperature Window
        4. 9.3.3.4 Charging Termination
          1. 9.3.3.4.1 Termination When REG02[0] = 1
        5. 9.3.3.5 Charging Safety Timer
          1. 9.3.3.5.1 Safety Timer Configuration Change
        6. 9.3.3.6 USB Timer When Charging from USB100mA Source
      4. 9.3.4 Status Outputs ( PG, STAT, and INT)
        1. 9.3.4.1 Power Good Indicator ( PG) (BQ24296)
        2. 9.3.4.2 Charging Status Indicator (STAT)
        3. 9.3.4.3 Interrupt to Host (INT)
      5. 9.3.5 Protections
        1. 9.3.5.1 Input Current Limit on ILIM
        2. 9.3.5.2 Thermal Regulation and Thermal Shutdown
        3. 9.3.5.3 Voltage and Current Monitoring in Buck Mode
          1. 9.3.5.3.1 Input Over-Voltage (ACOV)
          2. 9.3.5.3.2 System Over-Voltage Protection (SYSOVP)
        4. 9.3.5.4 Voltage and Current Monitoring in Boost Mode
          1. 9.3.5.4.1 Over-Current Protection
          2. 9.3.5.4.2 VBUS Over-Voltage Protection
        5. 9.3.5.5 Battery Protection
          1. 9.3.5.5.1 Battery Over-Voltage Protection (BATOVP)
          2. 9.3.5.5.2 Battery Short Protection
          3. 9.3.5.5.3 System Over-Current Protection
    4. 9.4 Device Functional Modes
      1. 9.4.1 Host Mode and Default Mode
        1. 9.4.1.1 Plug in USB100mA Source with Good Battery
        2. 9.4.1.2 USB Timer When Charging from USB100mA Source
    5. 9.5 Programming
      1. 9.5.1 Serial Interface
        1. 9.5.1.1 Data Validity
        2. 9.5.1.2 START and STOP Conditions
        3. 9.5.1.3 Byte Format
        4. 9.5.1.4 Acknowledge (ACK) and Not Acknowledge (NACK)
        5. 9.5.1.5 Target Address and Data Direction Bit
          1. 9.5.1.5.1 Single Read and Write
          2. 9.5.1.5.2 Multi-Read and Multi-Write
    6. 9.6 Register Map
      1. 9.6.1 I2C Registers
        1. 9.6.1.1  Input Source Control Register REG00 [reset = 00110xxx, or 3x]
        2. 9.6.1.2  Power-On Configuration Register REG01 [reset = 00011011, or 0x1B]
        3. 9.6.1.3  Charge Current Control Register REG02 [reset = 01100000, or 60]
        4. 9.6.1.4  Pre-Charge/Termination Current Control Register REG03 [reset = 00010001, or 0x11]
        5. 9.6.1.5  Charge Voltage Control Register REG04 [reset = 10110010, or 0xB2]
        6. 9.6.1.6  Charge Termination/Timer Control Register REG05 [reset = 10011010, or 0x9A]
        7. 9.6.1.7  Boost Voltage/Thermal Regulation Control Register REG06 [reset = 01110011, or 0x73]
        8. 9.6.1.8  Misc Operation Control Register REG07 [reset = 01001011, or 4B]
        9. 9.6.1.9  System Status Register REG08
        10. 9.6.1.10 New Fault Register REG09
        11. 9.6.1.11 Vender / Part / Revision Status Register REG0A
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
        1. 10.2.2.1 Inductor Selection
        2. 10.2.2.2 Input Capacitor
        3. 10.2.2.3 Output Capacitor
      3. 10.2.3 Application Performance Plots
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Device Support
      1. 13.1.1 Third-Party Products Disclaimer
    2. 13.2 Documentation Support
      1. 13.2.1 Related Documentation
    3. 13.3 Receiving Notification of Documentation Updates
    4. 13.4 Support Resources
    5. 13.5 Trademarks
    6. 13.6 Electrostatic Discharge Caution
    7. 13.7 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

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

9.3.1.5 Boost Mode Operation from Battery

The device supports boost converter operation to deliver power from the battery to other portable devices through USB port. The boost mode output current rating meets the USB On-The-Go 1-A output requirement. The maximum output current is 1.5 A. The boost operation can be enabled if the following conditions are valid:

  1. BAT above BATLOWV threshold (VBATLOWV set by REG04[1])
  2. VBUS less than VBAT + VSLEEP (in sleep mode)
  3. Boost mode operation is enabled (OTG pin HIGH and REG01[5:4] = 10)
  4. Thermistor Temperature is within boost mode temperature monitor threshold unless BHOT[1:0] is set to 11 (REG06[1:0]) to disable this monitor function
  5. After 30ms delay from boost mode enable

In boost mode, the device employs a 1.5-MHz step-up switching regulator. Similar to buck operation, the device switches from PWM operation to PFM operation at light load to improve efficiency.

During boost mode, the status register REG08[7:6] is set to 11, the VBUS output is 5 V and the output current can reach up to 1 A or 1.5 A, selected via I2C (REG01[0]). In addition, the device provides adjustable boost voltage from 4.55 V to 5.5 V by changing BOOSTV bits in REG06[7:4]

Any fault during boost operation, including VBUS over-voltage or over-current, sets the fault register REG09[6] to 1 and an INT is asserted.