SBAU227A March   2014  – June 2021 TPS56520 , TPS56720 , TPS56920 , TPS56C20

 

  1.   Trademarks
  2. 1Introduction
  3. 2Performance Specification Summary
  4. 3Modifications
    1. 3.1 Output Voltage Set Point
    2. 3.2 Output Voltage Set Point Using I2C Interface
      1. 3.2.1 PC Preparation
      2. 3.2.2 Connect the PC
      3. 3.2.3 Voltage Scaling Procedure
    3. 3.3 Output Filter and Closed Loop Response
  5. 4Test Setup and Results
    1. 4.1 Input/Output Connections
    2. 4.2 Start Up Procedure
    3. 4.3 Efficiency
    4. 4.4 Load Regulation
    5. 4.5 Line Regulation
    6. 4.6 Load Transient Response
    7. 4.7 Output Voltage Ripple
    8. 4.8 Start Up
    9. 4.9 Shut Down
  6. 5Board Layout
    1. 5.1 Board Layout
  7. 6Schematic, Bill of Materials and Reference
    1. 6.1 Schematic
    2. 6.2 Bill of Materials
    3. 6.3 Reference
  8. 7Revision History

3.2 Output Voltage Set Point Using I2C Interface

The engineer can change the TPS56C20 output voltage by using an I2C interface which can dynamically scale the output voltage in the range of 0.6 V to 1.87 V. Section 3.2.1, Section 3.2.2, and Section 3.2.3 explain the procedure to download all the software required and how to communicate between the evaluation module and the PC. The design includes an easy-to-use GUI so that the design engineer can test the I2C functionality without much prior experience. The test requires a PC running the Microsoft®Windows® operating system, the TI USB2ANY interface, and USB2ANY_GUI software. The design engineer can purchase the TI USB2ANY interface from the TI website.