TIDT367 December   2023

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Required Equipment
    3. 1.3 Test Setup
      1. 1.3.1 Hardware Setup
      2. 1.3.2 Software Setup
    4. 1.4 Running the Code for Different Labs
      1. 1.4.1 Lab 1. Primary to Secondary Power Flow, Open Loop Check PWM Driver
      2. 1.4.2 Lab 2. Primary to Secondary Power Flow, Open Loop CheckPWM Driver and ADC With Protection
      3. 1.4.3 Lab 3. Primary to Secondary Power Flow, Closed Voltage Loop Check
      4. 1.4.4 Lab 4. Primary to Secondary Power Flow, Closed Current Loop Check
      5. 1.4.5 Lab 6. Secondary to Primary Power Flow, Open Loop Check PWM Driver
      6. 1.4.6 Lab 7. Secondary to Primary Power Flow, Open Loop Check PWM Driver and ADC With Protection
      7. 1.4.7 Lab 8. Secondary to Primary Power Flow, Closed Voltage Loop Check
  6. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 Efficiency Data
    3. 2.3 Thermal Images
    4. 2.4 Bode Plots
  7. 3Waveforms
    1. 3.1 Switching
    2. 3.2 Load Transients
    3. 3.3 Start-Up Sequence
    4. 3.4 Dynamic Response
    5. 3.5 Mode Transition

3.5 Mode Transition

Phase shift mode and frequency mode transition waveforms are shown in the following figures.

GUID-20231108-SS0I-8HMJ-BGFM-NRGJDJJPQQGB-low.png
CH1: Primary Tank Current, CH2 and CH3: Primary VGS, CH4:Output Voltage
Figure 3-10 Frequency Mode With 48 VOUT, 5-A Load Current, 169-kHz Switching Frequency
GUID-20231108-SS0I-DHGV-BTKN-9BPVBCBCVPPH-low.png
CH1: Primary Tank Current, CH2 and CH3: Primary VGS, CH4:Output Voltage
Figure 3-12 Frequency Mode With 48 VOUT, 2-A Load Current, 179-kHz Switching Frequency
GUID-20231108-SS0I-G0L7-060F-CGQLXL3LF6NP-low.png
CH1: Primary Tank Current, CH2 and CH3: Primary VGS, CH4:Output Voltage
Figure 3-11 Phase Shift Mode With 48 VOUT, 1-A Load Current, 380-kHz Switching Frequency
GUID-20231108-SS0I-LF0P-JPZK-HH18FKT6JSGQ-low.png
CH1: Primary Tank Current, CH2 and CH3: Primary VGS, CH4:Output Voltage
Figure 3-13 Phase Shift Mode With 42 VOUT, 2-A Load Current, 380-kHz Switching Frequency