TIDUEB2A July   2022  – July 2022

 

  1.   Description
  2.   Resources
  3.   Features
  4.   Applications
  5.   5
  6. 1System Description
  7. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
      1. 2.2.1  Power Multiplexing Circuit Design Parameters
      2. 2.2.2  Input Connections and Filter
      3. 2.2.3  Reverse Polarity Protection
      4. 2.2.4  Battery Charger Input
      5. 2.2.5  Battery Ideal Diode-OR
      6. 2.2.6  Input and Battery Switchover Mechanics
      7. 2.2.7  LM74800 (U1) HGATE
      8. 2.2.8  Battery LM74800 HGATE
      9. 2.2.9  BQ25731 Design Considerations
      10. 2.2.10 BQ25731 Component Selection
      11. 2.2.11 ILIM Circuit
      12. 2.2.12 MCU and I2C Bus Design Considerations
      13. 2.2.13 MSP430FR2475
      14. 2.2.14 I2C Bus Overview
      15. 2.2.15 MSP430 Connectors
      16. 2.2.16 MSP430 Power Supply
      17. 2.2.17 Sensing Circuits
      18. 2.2.18 Current Sensing
      19. 2.2.19 Voltage Sensing
      20. 2.2.20 Input Comparators
      21. 2.2.21 Software Flow Chart
    3. 2.3 Highlighted Products
      1. 2.3.1 BQ25731
      2. 2.3.2 LM7480-Q1
      3. 2.3.3 LM74700-Q1
      4. 2.3.4 MSP430FR2475
      5. 2.3.5 PCA9546A
  8. 3Hardware, Testing Requirements, and Test Results
    1. 3.1 Hardware Requirements
    2. 3.2 Test Setup
    3. 3.3 Test Results
      1. 3.3.1 Adaptive Charge Current Limiting
      2. 3.3.2 Battery ORing System
      3. 3.3.3 Circuit Switchover From Adapter to Battery
  9. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 Schematics
      2. 4.1.2 BOM
    2. 4.2 Documentation Support
    3. 4.3 Support Resources
    4. 4.4 Trademarks
  10. 5Revision History

Test Setup

Table 3-3 shows the connections to the TIDA-010240 board for testing.

Table 3-3 TIDA-010240 Board Connections for Testing
Connector Description
J1 Connected to DC Power supply (12 V to 20 V)
J2 Battery A + and – connections
J3 Battery B + and – connections
J10 Connected to > 160-W E-Load
J4 MSPFET Connected for software monitoring
J5-1 Logic Analyzer SCL monitoring downstream
J5-2 Logic Analyzer SDA monitoring downstream
J5-3 Logic Analyzer GND Connection
J7-1 Host-MSP SDA connection for USB2ANY
J7-2 Host-MSP SCL connection for USB2ANY
J7-3 GND Connection for USB2ANY
J6-1 BQ25731 Device A SCL
J6-2 Battery Pack A SCL
J6-3 BQ25731 Device A SDA
J6-4 Battery Pack A SDA
J6-5 BQ25731 Device B SCL
J6-6 Battery Pack B SCL
J6-7 BQ25731 Device B SDA
J6-8 Battery Pack B SDA
J8 J8-2 jumper to J8-3. Ties VSYS to 3.3-V buck input
J9 J9-1 jumper to J9-2. Ties 3.3-V buck to 3.3-V system rail