TIDUF57 November   2023

 

  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 [Required Topic]
    3. 2.3 Highlighted Products
      1. 2.3.1 LMG3624
  9. 3System Design Theory
    1. 3.1 Quasi-Resonant Operation
    2. 3.2 Transformer Design
    3. 3.3 GaN FET Switching Device
    4. 3.4 Current Sense Emulation Resistor
  10. 4Hardware, Testing Requirements, and Test Results
    1. 4.1 Required Hardware
      1. 4.1.1 Hardware
      2. 4.1.2 Testing Equipment
    2. 4.2 Test Setup
    3. 4.3 Test Results
      1. 4.3.1 Efficiency Results
      2. 4.3.2 Thermal Results
      3. 4.3.3 Switching Waveforms
      4. 4.3.4 Switching Transients
  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 [Required Topic]
    4. 5.4 Support Resources
    5. 5.5 Trademarks
  12. 6About the Author

4.1.2 Testing Equipment

The following test equipment is required when working with this reference design:

    Voltage Source: Isolated AC source or variable AC transformer capable of 264 VRMS and capable of handling 100-W power level.
    CAUTION: Do not apply DC voltage to this board when testing. Damage to equipment and components is possible.
    Voltmeter: Digital voltage meter
    Power Analyzer: Capable of measuring 1 mW to 100 W of input power and capable of handling 264-VRMS input voltage. Some power analyzers can require a precision shunt resistor for measuring input current to measure input power of 5 W or less. Read the user manual for the power analyzer for proper measurement setups for full power and for stand-by power.
    Oscilloscope: 4-channel, 500-MHz bandwidth. Probes capable of handling 600 V.
    Load: TIDA-050072 comes populated with a USB Type-C® PD controller and requires external connection through an onboard USB Type-C connector to a USB Type-C PD load to adjust the board output to obtain 5-V, 9-V, 15-V, or 20-V. A USB Type-C PD communicating load is required to make the board evaluation. An example of such a load is PM125, USB Power Delivery Tester and PassMark® Software. Without such a communication load, the board output USB Type-C connector does not provide a variable output voltage. To obtain the full load current 3.00-A from 5 V, 9 V, and 15 V, a standard USB Type-C cable can be used, but to obtain 3.25 A at 20-V output, an E-marker USB Type-C cable must be used. In case the EVM is desired to test on a load without USB Type-C PD communication, the output voltage can be obtained from C18 , but only 5 V and up to 3.00 A can be obtained.