SLUSBC1B September 2013  – December 2016

PRODUCTION DATA. 

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Description (Continued)
  6. Pin Configuration and Functions
  7. Specifications
    1. 7.1Absolute Maximum Ratings
    2. 7.2ESD Ratings
    3. 7.3Recommended Operating Conditions
    4. 7.4Thermal Information
    5. 7.5Electrical Characteristics
    6. 7.6Timing Requirements
    7. 7.7Typical Characteristics
  8. Detailed Description
    1. 8.1Overview
    2. 8.2Functional Block Diagram
    3. 8.3Feature Description
      1. 8.3.1Device Power Up
        1. 8.3.1.1Power-On-Reset (POR)
        2. 8.3.1.2Power Up from Battery without DC Source
          1. 8.3.1.2.1BATFET Turn Off
          2. 8.3.1.2.2Shipping Mode
        3. 8.3.1.3Boost Mode Operation from Battery
          1. 8.3.1.3.1Integrated Control to Switch Between USB Charge Mode and Boost Mode
        4. 8.3.1.4Power Up from DC Source
          1. 8.3.1.4.1REGN LDO
          2. 8.3.1.4.2Input Source Qualification
          3. 8.3.1.4.3Input Current Limit Detection
          4. 8.3.1.4.4D+/D- Detection Sets Input Current Limit
          5. 8.3.1.4.5Force Input Current Limit Detection
        5. 8.3.1.5Converter Power-Up
        6. 8.3.1.6Low Power HIZ State
      2. 8.3.2Power Path Management
        1. 8.3.2.1Narrow VDC Architecture
        2. 8.3.2.2Dynamic Power Management
        3. 8.3.2.3Supplement Mode
      3. 8.3.3Battery Charging Management
        1. 8.3.3.1Autonomous Charging Cycle
        2. 8.3.3.2Battery Charging Profile
        3. 8.3.3.3Thermistor Qualification
          1. 8.3.3.3.1Cold/Hot Temperature Window
        4. 8.3.3.4Charging Termination
          1. 8.3.3.4.1Termination When REG02[0] = 1
        5. 8.3.3.5Charging Safety Timer
          1. 8.3.3.5.1Safety Timer Configuration Change
      4. 8.3.4Status Outputs (STAT, and INT)
        1. 8.3.4.1Charging Status Indicator (STAT)
        2. 8.3.4.2Interrupt to Host (INT)
      5. 8.3.5Protections
        1. 8.3.5.1Input Current Limit on ILIM
        2. 8.3.5.2Thermal Regulation and Thermal Shutdown
        3. 8.3.5.3Voltage and Current Monitoring in Buck Mode
          1. 8.3.5.3.1Input Over-Voltage (ACOV)
          2. 8.3.5.3.2System Over-Voltage Protection (SYSOVP)
        4. 8.3.5.4Current Monitoring in Boost Mode
        5. 8.3.5.5Battery Protection
          1. 8.3.5.5.1Battery Over-Voltage Protection (BATOVP)
          2. 8.3.5.5.2Battery Short Protection
          3. 8.3.5.5.3System Over-Current Protection
    4. 8.4Device Functional Modes
      1. 8.4.1Host Mode and Default Mode
    5. 8.5Programming
      1. 8.5.1Serial Interface
        1. 8.5.1.1Data Validity
        2. 8.5.1.2START and STOP Conditions
        3. 8.5.1.3Byte Format
        4. 8.5.1.4Acknowledge (ACK) and Not Acknowledge (NACK)
        5. 8.5.1.5Slave Address and Data Direction Bit
          1. 8.5.1.5.1Single Read and Write
          2. 8.5.1.5.2Multi-Read and Multi-Write
    6. 8.6Register Map
      1. 8.6.1I2C Registers
        1. 8.6.1.1 Input Source Control Register REG00 [reset = 01011000, or 0x58]58 to 0x58 in heading
        2. 8.6.1.2 Power-On Configuration Register REG01 [reset = 0011101100011011 to 00111011 and 0x1B to 0x3B in heading, or 0x3B]
        3. 8.6.1.3 Charge Current Control Register REG02 [reset = 00100000, or 0x20]
        4. 8.6.1.4 Pre-Charge/Termination Current Control Register REG03 [reset = 00010001, or 0x11]
        5. 8.6.1.5 Charge Voltage Control Register REG04 [reset = 10110010, or 0xB2]
        6. 8.6.1.6 Charge Termination/Timer Control Register REG05 [reset = 10011100, or 0x9C]
        7. 8.6.1.7 Boost Voltage/Thermal Regulation Control Register REG06 [reset = 10010011, or 0x93]
        8. 8.6.1.8 Misc Operation Control Register REG07 [reset = 01001011, or 0x4B4B to 0x4B in heading ]
        9. 8.6.1.9 System Status Register REG08
        10. 8.6.1.10New Fault Register REG09
        11. 8.6.1.11Vender / Part / Revision Status Register REG0A
  9. Application and Implementation
    1. 9.1Application Information
    2. 9.2Typical Application
      1. 9.2.1Design Requirements
      2. 9.2.2Detailed Design Procedure
        1. 9.2.2.1Inductor Selection
        2. 9.2.2.2Input Capacitor
        3. 9.2.2.3Output Capacitor
      3. 9.2.3Application Performance Plots
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1Layout Guidelines
    2. 11.2Layout Example
  12. 12Device and Documentation Support
    1. 12.1Documentation Support
      1. 12.1.1Related Documentation
    2. 12.2Receiving Notification of Documentation Updates
    3. 12.3Community Resources
    4. 12.4Trademarks
    5. 12.5Electrostatic Discharge Caution
    6. 12.6Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Features

  • 90% High Efficiency Switch Mode 3-A Charger
  • 3.9-V to 6.2-V Single Input USB-Compliant Charger with 6.4-V Over-Voltage Protection
    • USB Host or Charging Port D+/D- Detection Compatible to USB Battery Charger Spec (BC1.2)
    • Support Non-Standard 2-A/1-A Adapters Detection
    • Input Voltage and Current Limit Supports USB2.0 and USB 3.0
    • Input Current Limit: 100 mA, 150 mA, 500 mA, 900 mA, 1 A, 1.5 A, 2 A, and 3 A
  • Synchronous Boost Converter in Battery Boost Mode with
    • Adjustable Output 4.55 V – 5.5 V at 1.5 A
    • 90% 5.1-V Boost Mode Efficiency
    • Fast OTG Startup (22 ms Typ)
  • Narrow VDC (NVDC) Power Path Management
    • Instant System On with No Battery or Deeply Discharged Battery
    • Ideal Diode Operation in Battery Supplement Mode
  • 1.5-MHz Switching Frequency for Low Profile 1.2-mm Inductor
  • I2C Port for Optimal System Performance and Status Reporting
  • Autonomous Battery Charging with or without Host Management
    • Battery Charge Enable
    • Battery Charge Preconditioning
    • Charge Termination and Recharge
  • High Accuracy
    • ±0.5% Charge Voltage Regulation
    • ±7% Charge Current Regulation
    • ±7.5% Input Current Regulation
    • ±3% Output Voltage Regulation in Boost Mode
  • High Integration
    • Power Path Management
    • Synchronous Switching MOSFETs
    • Integrated Current Sensing
    • Bootstrap Diode
    • Internal Loop Compensation
  • Safety
    • Battery Temperature Sensing for Charging and Discharging in Boost Mode
    • Battery Charging Safety Timer
    • Thermal Regulation and Thermal Shutdown
    • Input and System Over-Voltage Protection
    • MOSFET Over-Current Protection
  • Charge Status Outputs for LED or Host Processor
  • Maximum Power Tracking Capability by Input Voltage Regulation
  • 20-µA Low Battery Leakage Current and Support Shipping Mode
  • 4mm x 4mm VQFN-24 Package

Applications

  • Power Bank for Smartphone, Tablet
  • Portable Media Players
  • Internet Devices

Description

The bq24295 is a highly-integrated switch-mode battery charge management and system power path management devices for 1 cell Li-Ion and Li-polymer battery in a wide range of power bank, tablet and other portable device applications.

Device Information(1)

PART NUMBERPACKAGE BODY SIZE (NOM)
bq24295VQFN (24) 4.00 mm x 4.00 mm
  1. For all available packages, see the orderable addendum at the end of the datasheet.

bq24295 with USB D+/D- Detection for Charging and Discharging in Boost Mode

bq24295 app_diag_lusbc1.gif

Revision History

Changes from A Revision (January 2015) to B Revision

Changes from * Revision (September 2013) to A Revision

  • Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section.Go
  • Changed 5.52kΩ to 5.25kΩ in bq24295 with USB D+/D- Detection for Charging and Discharging in Boost Mode Go
  • Changed Power Pad to Thermal Pad throughout data sheetGo
  • Changed REG01[5] to REG01[5] = 1 in OTG descriptionGo
  • Added (10k NTC thermistor only) to QON descriptionGo
  • Changed ICHG = 1792 mA in IICHG_REG_ACC test conditionsGo
  • Changed falling to rising and TYP to 47.2% in VHTF in Electrical CharacteristicsGo
  • Added VIH_OTG to Electrical CharacteristicsGo
  • Deleted wavefroms from Typical Characteristics and added to Application Performance PlotsGo
  • Changed Table 3 Go
  • Added paragraph after Table 3Go
  • Changed Figure 15 Go
  • Changed from 2048 mA to 1024 mA in Table 5Go
  • Changed RT1 = 5.25 kΩ Go
  • Deleted and LSFET from Voltage and Current Monitoring in Buck Mode descriptionGo
  • Changed REG09[5] to REG09[3] in Battery Over-Voltage Protection (BATOVP) sectionGo
  • Changed reset = 01100000, or 60 to reset = 00100000, or 0x20 for REG02Go
  • Changed Default: 2048 mA (011000) to Default: 1024mA (001000) for bits [7:2] in REG02Go
  • Changed reset = 10011010, or 0x9A to reset = 10011100, or 0x9C for REG05Go
  • Changed 0 to 1 for REG05 Bit 2 Reset Go
  • Changed 1 to 0 for REG05 Bit 1 ResetGo
  • Changed REG09 Bit 3 description 1 – Battery OVP Go
  • Changed paragraph in Application Information Go
  • Changed 5.52kΩ to 5.25kΩ in Figure 40 Go