TIDUEY1B November   2020  – April 2024 BQ25798

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
    1. 1.1 Key System Specifications
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
    3. 2.3 Highlighted Products
      1. 2.3.1 TPS25750D
      2. 2.3.2 BQ25798
    4. 2.4 System Design Theory
      1. 2.4.1 TPS25750D PD Controller
      2. 2.4.2 BQ25798 Battery Charger
      3. 2.4.3 TPS54531 Buck Converter
      4. 2.4.4 TLV75533 LDO
      5. 2.4.5 USB Type-C® Receptacle
      6. 2.4.6 Supporting Components for Programming
  9. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Hardware and Software Requirements
    2. 3.2 Application Customization Tool
    3. 3.3 Test Setup
    4. 3.4 Test Results
  10. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 Schematics
      2. 4.1.2 BOM
      3. 4.1.3 Altium Project
    2. 4.2 Software
    3. 4.3 Documentation Support
    4. 4.4 Support Resources
    5. 4.5 Trademarks
  11. 5About the Author
  12. 6Revision History

2.3.2 BQ25798

The BQ25798 is an integrated switched-mode buck-boost battery charge management device intended for 1- to 4-series cell Li-ion and Li-polymer batteries. The charger features a narrow VDC architecture (NVDC) which allows the system to be regulated to a minimum value even if the battery is completely discharged. Additionally, the BQ25798 supports input source detection through D+ and D– which is compatible with USB 2.0, USB 3.0 power delivery, non-standard adapters, and high voltage adapters. With dual-input source selection, USB OTG support, and an integrated 16-bit multichannel analog-to-digital converter (ADC), the BQ25798 is a complete charging design.


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Figure 2-3 BQ25798 Typical Application Circuit