TIDUFC8 July   2025

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
      1. 2.2.1 Introduction
      2. 2.2.2 Basic Operation Principles and ZVS Requirements
    3. 2.3 Highlighted Products
      1. 2.3.1 UCC27288
      2. 2.3.2 UCC23513
      3. 2.3.3 TMS320F2800137
      4. 2.3.4 TLV9062
      5. 2.3.5 INA181
      6. 2.3.6 TPSM861252
      7. 2.3.7 AMC0311R
  9. 3System Design Theory
    1. 3.1 Design Theory
      1. 3.1.1 Resonant Tank Design
      2. 3.1.2 Full-Range ZVS Realization
      3. 3.1.3 Total Control Algorithm
      4. 3.1.4 Resonant Tank RMS Current Analysis
    2. 3.2 Hardware Design Theory
      1. 3.2.1 Resonant Capacitors
      2. 3.2.2 Power Stage
      3. 3.2.3 Voltage Sensing
      4. 3.2.4 Current Sensing
  10. 4Hardware, Software, Testing Requirements, and Test Results
    1. 4.1 Hardware Requirements
    2. 4.2 Software Requirements
      1. 4.2.1 Simulation
    3. 4.3 Test Setup
    4. 4.4 Test Results
  11. 5Design and Documentation Support
    1. 5.1 Design Files
      1. 5.1.1 Schematics
      2. 5.1.2 BOM
      3. 5.1.3 PCB Layout Recommendations
        1. 5.1.3.1 Layout Prints
    2. 5.2 Tools
    3. 5.3 Documentation Support
    4. 5.4 Support Resources
    5. 5.5 Trademarks
  12. 6About the Author

3.2.2 Power Stage

Figure 3-5 shows the power stage of the bidirectional isolated dual-bridge series resonant DC/DC converter. The primary side consists of a 80V, 4.1mΩ, N-channel, NexFET™ power MOSFET CSD19502Q5B to block a DC voltage of 24V, and the secondary side consists of a 100V, 14.5mΩ, N-channel NexFET™ power MOSFET CSD19537Q3 to block DC voltage of 60V. There are two switches on each side of the primary and secondary sides to form a half-bridge, and the other set of bridge arms is composed of resonant capacitors.

TIDA-010966 Power Stage of Bidirectional Isolated Dual-Bridge Series Resonant DC/DC ConverterFigure 3-5 Power Stage of Bidirectional Isolated Dual-Bridge Series Resonant DC/DC Converter

The full bridges are connected with a high-frequency transformer with integrated leakage inductance (T1).