TIDUF99 November   2024

 

  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 TMS320F2800137
      2. 2.3.2 LMG2100R026
      3. 2.3.3 TMCS1127
      4. 2.3.4 LM5164
      5. 2.3.5 LM74610-Q1
      6. 2.3.6 AFE031
      7. 2.3.7 CC1352P7
  9. 3System Design Theory
    1. 3.1 MPPT Operation
    2. 3.2 Power Optimizer Function
      1. 3.2.1 Power Line Communication (PLC)
    3. 3.3 Four-Switch Buck-Boost Converter
    4. 3.4 Output Inductance
    5. 3.5 Input Capacitance
    6. 3.6 Current Sensor
      1. 3.6.1 Current Measurement Resolution
      2. 3.6.2 Current Sensor Power Dissipation
    7. 3.7 Switching Regulator
    8. 3.8 Bypass Circuit
  10. 4Hardware, Software, Testing Requirements, and Test Results
    1. 4.1 Hardware Requirements
    2. 4.2 Software Requirements
    3. 4.3 Test Setup
    4. 4.4 Test Results
      1. 4.4.1 Short Mode Test Result
      2. 4.4.2 Switching Mode Test Result
      3. 4.4.3 Bypass Circuit Test Results
      4. 4.4.4 PLC Test Results
  11. 5Design and Documentation Support
    1. 5.1 Design Files
      1. 5.1.1 Schematics
      2. 5.1.2 BOM
    2. 5.2 Tools and Software
    3. 5.3 Documentation Support
    4. 5.4 Support Resources
    5. 5.5 Trademarks
  12. 6About the Author

3.7 Switching Regulator

This reference design requires 12V for AFE031, 5V for the C2000 control card and GaN device (the LMG2100R026), subsequently stepped down from 5V to 3.3V for the sampling device and other components, to operate. To generate the 12V line from the power lines (panel), a wide VIN buck, switching regulator LM5164 is needed to support a maximum voltage of 80V.

A fly-buck topology based on LMR51410XF, a fixed switching frequency regulator is used to generate two isolated 5V for the upper FET of LMG2100 to support a 100% duty cycle.
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