TIDT355 October   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 Dimensions
  6. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 Efficiency Data
    3. 2.3 Thermal Images
  7. 3Waveforms
    1. 3.1 Switching
    2. 3.2 Output Voltage Ripple
    3. 3.3 Load Transients
    4. 3.4 Start-Up and Power-Down Sequence
    5. 3.5 Overcurrent Protection
    6. 3.6 Short-Circuit Protection

3.4 Start-Up and Power-Down Sequence

Start-up behavior is shown in the following figures.

GUID-20230922-SS0I-JBS5-WTNF-2J6LTJQ4PWRL-low.png
CH1: VIN, CH3: 24-V output voltage
Figure 3-17 Start-Up Waveform at 350 VIN,
Half Load
GUID-20230922-SS0I-6SVK-98P0-MHJPQMXWXXLZ-low.png
CH3: 24-V output voltage, CH4: primary current
Figure 3-19 Start-Up Waveform at 600 VIN,
Full Load
GUID-20230922-SS0I-DJZG-VTWG-JXDZDVF3LTVW-low.png
CH3: 24-V output voltage, CH4: primary current
Figure 3-21 Start-Up Waveform at 1500 VIN, Open Load
GUID-20230922-SS0I-P8LZ-VXFJ-NCGDXX63CJHK-low.png
CH3: 24-V output voltage, CH4: primary current
Figure 3-23 Power Down at 1500 VIN, Full Load
GUID-20230922-SS0I-DNJK-1WS9-LG9CQX02SBHN-low.png
CH3: 24-V output voltage, CH4: primary current
Figure 3-18 Start-Up Waveform at 600 VIN,
Open Load
GUID-20230922-SS0I-M7C5-BCTD-VFHXFXNRKBSK-low.png
CH3: 24-V output voltage, CH4: primary current
Figure 3-20 Power-Down Waveform at VIN = 600 V, Full Load
GUID-20230922-SS0I-J9JG-JG0S-4CLWJBND39SB-low.png
CH3: 24-V output voltage, CH4: primary current
Figure 3-22 Start-Up Waveform at 1500 VIN,
Full Load