TIDUEJ8C January   2019  – May 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 MSPM0G1506
      2. 2.3.2 LMG2100R044
      3. 2.3.3 INA241
      4. 2.3.4 TPSM365
      5. 2.3.5 TMP303
    4. 2.4 System Design Theory
      1. 2.4.1 MPPT Operation
      2. 2.4.2 Buck Converter
        1. 2.4.2.1 Output Inductance
        2. 2.4.2.2 Input Capacitance
      3. 2.4.3 Current Sense Amplifier
        1. 2.4.3.1 Shunt Resistor Selection
        2. 2.4.3.2 Current Measurement Resolution
        3. 2.4.3.3 Shunt Resistor Power Dissipation
      4. 2.4.4 Switching Regulator
  9. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Required Hardware and Software
      1. 3.1.1 Hardware
        1. 3.1.1.1 TIDA-010042
        2. 3.1.1.2 ITECH-IT6724H
        3. 3.1.1.3 Chroma, 63107A
      2. 3.1.2 Software Flow
    2. 3.2 Testing and Results
      1. 3.2.1 Test Setup
      2. 3.2.2 Test Results
  10. 4Design Files
    1. 4.1 Schematics
    2. 4.2 Bill of Materials
    3. 4.3 PCB Layout Recommendations
      1. 4.3.1 Loop Inductances
      2. 4.3.2 Current Sense Amplifiers
      3. 4.3.3 Trace Widths
      4. 4.3.4 Layout Prints
    4. 4.4 Altium Project
    5. 4.5 Gerber Files
    6. 4.6 Assembly Drawings
    7. 4.7 Software Files
  11. 5Related Documentation
    1. 5.1 Trademarks
    2. 5.2 Support Resources
  12. 6About the Author
  13. 7Revision History

2.4.4 Switching Regulator

Table 2-3 Switching Regulator Design Criteria
PARAMETER SPECIFICATION
Input voltage range 10V to 60V
Output voltage 5V
Load current 600mA

This reference design requires 5V for the gate drivers (UCC27517 device) and GaN device (the LMG2100R044), subsequently stepped down to 3.3V for the MSPM0G1506 device and other components, to operate. To generate the 5V line from the power lines (panel), a wide VIN buck, switching regulator is needed to support a maximum panel voltage of 60 V.

The TPSM365R6V5 device is a 5V fixed output, wide VIN, frequency adjustable buck regulator with integrated inductor and boot capacitor that provides cost effective, compact, and highly-efficient power conversion design. See the Application and Implementation section of the TPSM365R6, TPSM365R3 3-V to 65-V Input, 600-mA/300-mA, 4-μA No-Load IQ Synchronous Buck Converter Power Module in a HotRod™ QFN Package as a starting point for this design; however, an input below 12V was not supported during testing.